/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 16:50:44,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 16:50:44,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 16:50:44,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 16:50:44,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 16:50:44,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 16:50:44,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 16:50:44,205 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 16:50:44,227 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 16:50:44,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 16:50:44,227 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 16:50:44,227 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 16:50:44,228 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 16:50:44,228 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 16:50:44,228 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 16:50:44,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 16:50:44,228 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 16:50:44,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 16:50:44,228 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 16:50:44,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 16:50:44,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 16:50:44,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 16:50:44,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 16:50:44,231 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 16:50:44,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 16:50:44,232 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 16:50:44,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 16:50:44,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 16:50:44,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 16:50:44,232 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 16:50:44,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 16:50:44,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:50:44,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 16:50:44,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 16:50:44,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 16:50:44,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 16:50:44,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 16:50:44,233 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 16:50:44,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 16:50:44,233 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 16:50:44,234 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 16:50:44,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 16:50:44,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 16:50:44,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 16:50:44,512 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 16:50:44,516 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 16:50:44,517 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl [2021-06-05 16:50:44,517 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl' [2021-06-05 16:50:44,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 16:50:44,546 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 16:50:44,547 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 16:50:44,547 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 16:50:44,547 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 16:50:44,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:50:44" (1/1) ... [2021-06-05 16:50:44,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:50:44" (1/1) ... [2021-06-05 16:50:44,576 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 16:50:44,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 16:50:44,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 16:50:44,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 16:50:44,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:50:44" (1/1) ... [2021-06-05 16:50:44,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:50:44" (1/1) ... [2021-06-05 16:50:44,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:50:44" (1/1) ... [2021-06-05 16:50:44,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:50:44" (1/1) ... [2021-06-05 16:50:44,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:50:44" (1/1) ... [2021-06-05 16:50:44,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:50:44" (1/1) ... [2021-06-05 16:50:44,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:50:44" (1/1) ... [2021-06-05 16:50:44,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 16:50:44,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 16:50:44,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 16:50:44,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 16:50:44,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:50:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:50:44,653 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 16:50:44,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 16:50:44,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 16:50:44,654 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 16:50:44,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 16:50:44,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 16:50:44,654 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 16:50:44,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 16:50:44,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 16:50:44,654 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 16:50:44,655 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 16:50:44,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 16:50:44,656 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 16:50:44,844 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 16:50:44,844 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 16:50:44,846 INFO L202 PluginConnector]: Adding new model parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:50:44 BoogieIcfgContainer [2021-06-05 16:50:44,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 16:50:44,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 16:50:44,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 16:50:44,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 16:50:44,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:50:44" (1/2) ... [2021-06-05 16:50:44,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aff6e3b and model type parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:50:44, skipping insertion in model container [2021-06-05 16:50:44,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:50:44" (2/2) ... [2021-06-05 16:50:44,851 INFO L111 eAbstractionObserver]: Analyzing ICFG parray-copy.wvr.bpl [2021-06-05 16:50:44,855 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 16:50:44,855 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 16:50:44,855 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 16:50:44,861 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 16:50:44,923 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 16:50:44,938 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 16:50:44,966 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 16:50:44,966 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 16:50:44,967 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 16:50:44,967 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 16:50:44,967 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 16:50:44,967 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 16:50:44,967 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 16:50:44,967 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 16:50:44,973 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 31 transitions, 86 flow [2021-06-05 16:50:44,997 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 116 states, 114 states have (on average 2.7719298245614037) internal successors, (316), 115 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:44,999 INFO L276 IsEmpty]: Start isEmpty. Operand has 116 states, 114 states have (on average 2.7719298245614037) internal successors, (316), 115 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:45,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:50:45,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:45,006 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 16:50:45,008 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:45,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:45,011 INFO L82 PathProgramCache]: Analyzing trace with hash -245139670, now seen corresponding path program 1 times [2021-06-05 16:50:45,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:45,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374489484] [2021-06-05 16:50:45,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:45,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:45,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374489484] [2021-06-05 16:50:45,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374489484] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:50:45,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:50:45,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:50:45,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634962447] [2021-06-05 16:50:45,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:50:45,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:45,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:50:45,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:50:45,199 INFO L87 Difference]: Start difference. First operand has 116 states, 114 states have (on average 2.7719298245614037) internal successors, (316), 115 states have internal predecessors, (316), 0 states have call successors, (0), 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 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:45,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:45,276 INFO L93 Difference]: Finished difference Result 156 states and 438 transitions. [2021-06-05 16:50:45,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 16:50:45,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 16:50:45,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:45,288 INFO L225 Difference]: With dead ends: 156 [2021-06-05 16:50:45,289 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 16:50:45,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:50:45,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 16:50:45,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 135. [2021-06-05 16:50:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.8059701492537314) internal successors, (376), 134 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:45,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 376 transitions. [2021-06-05 16:50:45,344 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 376 transitions. Word has length 20 [2021-06-05 16:50:45,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:45,345 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 376 transitions. [2021-06-05 16:50:45,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:45,345 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 376 transitions. [2021-06-05 16:50:45,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:50:45,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:45,348 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:45,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 16:50:45,348 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:45,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:45,351 INFO L82 PathProgramCache]: Analyzing trace with hash -716869078, now seen corresponding path program 1 times [2021-06-05 16:50:45,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:45,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026682296] [2021-06-05 16:50:45,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:45,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:45,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026682296] [2021-06-05 16:50:45,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026682296] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:50:45,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:50:45,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:50:45,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476583100] [2021-06-05 16:50:45,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:50:45,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:45,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:50:45,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:50:45,411 INFO L87 Difference]: Start difference. First operand 135 states and 376 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:45,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:45,445 INFO L93 Difference]: Finished difference Result 160 states and 450 transitions. [2021-06-05 16:50:45,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:50:45,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:50:45,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:45,448 INFO L225 Difference]: With dead ends: 160 [2021-06-05 16:50:45,448 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 16:50:45,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:50:45,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 16:50:45,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-06-05 16:50:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.830188679245283) internal successors, (450), 159 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 450 transitions. [2021-06-05 16:50:45,467 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 450 transitions. Word has length 22 [2021-06-05 16:50:45,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:45,468 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 450 transitions. [2021-06-05 16:50:45,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:45,468 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 450 transitions. [2021-06-05 16:50:45,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:50:45,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:45,473 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:45,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 16:50:45,474 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:45,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:45,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1666279556, now seen corresponding path program 1 times [2021-06-05 16:50:45,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:45,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273037113] [2021-06-05 16:50:45,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:45,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:45,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273037113] [2021-06-05 16:50:45,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273037113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:45,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053859375] [2021-06-05 16:50:45,800 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 16:50:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:45,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:50:45,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:46,143 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 8 treesize of output 7 [2021-06-05 16:50:46,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:46,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:46,158 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 16:50:46,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:20 [2021-06-05 16:50:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:46,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053859375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:46,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:46,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 16:50:46,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96299785] [2021-06-05 16:50:46,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:50:46,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:46,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:50:46,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:50:46,196 INFO L87 Difference]: Start difference. First operand 160 states and 450 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:46,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:46,643 INFO L93 Difference]: Finished difference Result 395 states and 1116 transitions. [2021-06-05 16:50:46,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:50:46,644 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:50:46,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:46,645 INFO L225 Difference]: With dead ends: 395 [2021-06-05 16:50:46,645 INFO L226 Difference]: Without dead ends: 280 [2021-06-05 16:50:46,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 572.0ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:50:46,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-05 16:50:46,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 194. [2021-06-05 16:50:46,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.8911917098445596) internal successors, (558), 193 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:46,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 558 transitions. [2021-06-05 16:50:46,656 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 558 transitions. Word has length 24 [2021-06-05 16:50:46,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:46,657 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 558 transitions. [2021-06-05 16:50:46,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:46,657 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 558 transitions. [2021-06-05 16:50:46,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:50:46,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:46,658 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:46,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 16:50:46,873 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:46,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:46,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1670859648, now seen corresponding path program 2 times [2021-06-05 16:50:46,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:46,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033673282] [2021-06-05 16:50:46,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:47,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:47,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033673282] [2021-06-05 16:50:47,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033673282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:47,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132836901] [2021-06-05 16:50:47,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:47,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:50:47,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:47,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:50:47,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:47,287 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 8 treesize of output 7 [2021-06-05 16:50:47,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:47,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:47,300 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 16:50:47,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:23 [2021-06-05 16:50:47,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:47,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132836901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:47,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:47,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:50:47,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180039243] [2021-06-05 16:50:47,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:50:47,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:47,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:50:47,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:50:47,407 INFO L87 Difference]: Start difference. First operand 194 states and 558 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:48,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:48,396 INFO L93 Difference]: Finished difference Result 639 states and 1800 transitions. [2021-06-05 16:50:48,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:50:48,397 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 24 [2021-06-05 16:50:48,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:48,399 INFO L225 Difference]: With dead ends: 639 [2021-06-05 16:50:48,400 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 16:50:48,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 894.1ms TimeCoverageRelationStatistics Valid=307, Invalid=1253, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:50:48,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 16:50:48,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 281. [2021-06-05 16:50:48,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.8892857142857142) internal successors, (809), 280 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:48,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 809 transitions. [2021-06-05 16:50:48,410 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 809 transitions. Word has length 24 [2021-06-05 16:50:48,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:48,410 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 809 transitions. [2021-06-05 16:50:48,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:48,411 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 809 transitions. [2021-06-05 16:50:48,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:48,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:48,411 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:48,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:48,625 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:48,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1190941142, now seen corresponding path program 3 times [2021-06-05 16:50:48,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:48,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549794608] [2021-06-05 16:50:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:48,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:48,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549794608] [2021-06-05 16:50:48,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549794608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:48,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968874452] [2021-06-05 16:50:48,684 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:48,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:50:48,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:48,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:50:48,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:48,805 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 8 treesize of output 7 [2021-06-05 16:50:48,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:48,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:48,817 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 16:50:48,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-05 16:50:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:50:48,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968874452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:48,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:48,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 16:50:48,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911881607] [2021-06-05 16:50:48,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:50:48,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:48,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:50:48,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:50:48,943 INFO L87 Difference]: Start difference. First operand 281 states and 809 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:50,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:50,159 INFO L93 Difference]: Finished difference Result 1001 states and 2814 transitions. [2021-06-05 16:50:50,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:50:50,159 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 26 [2021-06-05 16:50:50,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:50,163 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 16:50:50,163 INFO L226 Difference]: Without dead ends: 966 [2021-06-05 16:50:50,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 772.8ms TimeCoverageRelationStatistics Valid=549, Invalid=2757, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:50:50,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-06-05 16:50:50,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 305. [2021-06-05 16:50:50,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.924342105263158) internal successors, (889), 304 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 889 transitions. [2021-06-05 16:50:50,174 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 889 transitions. Word has length 26 [2021-06-05 16:50:50,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:50,174 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 889 transitions. [2021-06-05 16:50:50,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:50,174 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 889 transitions. [2021-06-05 16:50:50,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:50,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:50,175 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:50,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:50,389 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:50,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:50,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1175480346, now seen corresponding path program 4 times [2021-06-05 16:50:50,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:50,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887933419] [2021-06-05 16:50:50,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:50,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:50,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887933419] [2021-06-05 16:50:50,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887933419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:50,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791484168] [2021-06-05 16:50:50,433 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:50,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:50:50,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:50,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:50:50,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:50,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791484168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:50,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:50,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:50:50,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928821999] [2021-06-05 16:50:50,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:50:50,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:50,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:50:50,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:50:50,546 INFO L87 Difference]: Start difference. First operand 305 states and 889 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 16:50:51,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:51,315 INFO L93 Difference]: Finished difference Result 1201 states and 3376 transitions. [2021-06-05 16:50:51,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:50:51,315 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:50:51,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:51,320 INFO L225 Difference]: With dead ends: 1201 [2021-06-05 16:50:51,320 INFO L226 Difference]: Without dead ends: 1201 [2021-06-05 16:50:51,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 449.4ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:50:51,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-06-05 16:50:51,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 365. [2021-06-05 16:50:51,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.0961538461538463) internal successors, (1127), 364 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:51,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1127 transitions. [2021-06-05 16:50:51,331 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1127 transitions. Word has length 26 [2021-06-05 16:50:51,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:51,331 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 1127 transitions. [2021-06-05 16:50:51,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 16:50:51,331 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1127 transitions. [2021-06-05 16:50:51,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:51,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:51,332 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:51,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:51,550 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:51,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:51,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1693913438, now seen corresponding path program 5 times [2021-06-05 16:50:51,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:51,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495372318] [2021-06-05 16:50:51,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:51,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:51,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495372318] [2021-06-05 16:50:51,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495372318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:51,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419704551] [2021-06-05 16:50:51,586 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:51,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:50:51,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:51,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:50:51,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:51,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419704551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:51,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:51,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:50:51,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303626727] [2021-06-05 16:50:51,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:50:51,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:51,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:50:51,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:50:51,709 INFO L87 Difference]: Start difference. First operand 365 states and 1127 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 16:50:52,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:52,448 INFO L93 Difference]: Finished difference Result 1858 states and 5235 transitions. [2021-06-05 16:50:52,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:50:52,449 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:50:52,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:52,455 INFO L225 Difference]: With dead ends: 1858 [2021-06-05 16:50:52,456 INFO L226 Difference]: Without dead ends: 1858 [2021-06-05 16:50:52,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 444.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:50:52,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-06-05 16:50:52,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 388. [2021-06-05 16:50:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.1834625322997416) internal successors, (1232), 387 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:52,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1232 transitions. [2021-06-05 16:50:52,474 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1232 transitions. Word has length 26 [2021-06-05 16:50:52,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:52,474 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1232 transitions. [2021-06-05 16:50:52,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 16:50:52,474 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1232 transitions. [2021-06-05 16:50:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:52,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:52,475 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:52,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 16:50:52,689 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:52,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:52,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1481056820, now seen corresponding path program 6 times [2021-06-05 16:50:52,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:52,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929135506] [2021-06-05 16:50:52,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:52,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:52,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929135506] [2021-06-05 16:50:52,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929135506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:52,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567188278] [2021-06-05 16:50:52,723 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:52,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:50:52,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:52,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:50:52,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:52,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567188278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:52,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:52,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:50:52,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253106099] [2021-06-05 16:50:52,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:50:52,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:52,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:50:52,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:50:52,833 INFO L87 Difference]: Start difference. First operand 388 states and 1232 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 16:50:53,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:53,413 INFO L93 Difference]: Finished difference Result 1674 states and 4689 transitions. [2021-06-05 16:50:53,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:50:53,414 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 26 [2021-06-05 16:50:53,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:53,419 INFO L225 Difference]: With dead ends: 1674 [2021-06-05 16:50:53,420 INFO L226 Difference]: Without dead ends: 1670 [2021-06-05 16:50:53,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 317.9ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:50:53,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-06-05 16:50:53,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 402. [2021-06-05 16:50:53,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.1645885286783044) internal successors, (1269), 401 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:53,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1269 transitions. [2021-06-05 16:50:53,441 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1269 transitions. Word has length 26 [2021-06-05 16:50:53,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:53,442 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1269 transitions. [2021-06-05 16:50:53,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 16:50:53,442 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1269 transitions. [2021-06-05 16:50:53,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:53,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:53,443 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:53,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:53,653 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:53,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:53,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1751566512, now seen corresponding path program 7 times [2021-06-05 16:50:53,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:53,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589163693] [2021-06-05 16:50:53,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:53,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:53,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589163693] [2021-06-05 16:50:53,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589163693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:53,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975149634] [2021-06-05 16:50:53,694 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:53,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:50:53,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:53,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975149634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:53,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:53,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:50:53,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59952689] [2021-06-05 16:50:53,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:50:53,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:53,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:50:53,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:50:53,805 INFO L87 Difference]: Start difference. First operand 402 states and 1269 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 16:50:54,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:54,432 INFO L93 Difference]: Finished difference Result 1844 states and 5052 transitions. [2021-06-05 16:50:54,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:50:54,433 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 26 [2021-06-05 16:50:54,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:54,439 INFO L225 Difference]: With dead ends: 1844 [2021-06-05 16:50:54,439 INFO L226 Difference]: Without dead ends: 1844 [2021-06-05 16:50:54,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 339.4ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:50:54,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-06-05 16:50:54,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 400. [2021-06-05 16:50:54,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.1679197994987467) internal successors, (1264), 399 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1264 transitions. [2021-06-05 16:50:54,459 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1264 transitions. Word has length 26 [2021-06-05 16:50:54,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:54,460 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1264 transitions. [2021-06-05 16:50:54,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 16:50:54,460 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1264 transitions. [2021-06-05 16:50:54,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:54,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:54,461 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:54,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:54,673 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:54,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:54,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1992513178, now seen corresponding path program 8 times [2021-06-05 16:50:54,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:54,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562049630] [2021-06-05 16:50:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:54,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:54,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562049630] [2021-06-05 16:50:54,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562049630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:54,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199930770] [2021-06-05 16:50:54,724 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:54,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:50:54,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:54,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:50:54,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:54,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:54,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199930770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:54,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:54,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:50:54,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440861154] [2021-06-05 16:50:54,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:50:54,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:54,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:50:54,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:50:54,834 INFO L87 Difference]: Start difference. First operand 400 states and 1264 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 16:50:55,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:55,292 INFO L93 Difference]: Finished difference Result 1308 states and 3890 transitions. [2021-06-05 16:50:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:50:55,293 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:50:55,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:55,297 INFO L225 Difference]: With dead ends: 1308 [2021-06-05 16:50:55,297 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 16:50:55,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 306.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:50:55,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 16:50:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 415. [2021-06-05 16:50:55,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.2294685990338166) internal successors, (1337), 414 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:55,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1337 transitions. [2021-06-05 16:50:55,309 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1337 transitions. Word has length 26 [2021-06-05 16:50:55,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:55,309 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1337 transitions. [2021-06-05 16:50:55,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 16:50:55,309 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1337 transitions. [2021-06-05 16:50:55,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:55,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:55,310 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:55,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 16:50:55,528 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:55,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:55,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1182457080, now seen corresponding path program 9 times [2021-06-05 16:50:55,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:55,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911936928] [2021-06-05 16:50:55,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:55,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:55,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911936928] [2021-06-05 16:50:55,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911936928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:55,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017816909] [2021-06-05 16:50:55,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:55,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:50:55,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:55,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:50:55,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:55,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017816909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:55,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:55,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:50:55,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589265000] [2021-06-05 16:50:55,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:50:55,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:55,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:50:55,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:50:55,671 INFO L87 Difference]: Start difference. First operand 415 states and 1337 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 16:50:56,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:56,015 INFO L93 Difference]: Finished difference Result 1124 states and 3354 transitions. [2021-06-05 16:50:56,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:50:56,015 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 26 [2021-06-05 16:50:56,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:56,019 INFO L225 Difference]: With dead ends: 1124 [2021-06-05 16:50:56,019 INFO L226 Difference]: Without dead ends: 1120 [2021-06-05 16:50:56,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 215.3ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:50:56,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-06-05 16:50:56,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 421. [2021-06-05 16:50:56,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.2333333333333334) internal successors, (1358), 420 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:56,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1358 transitions. [2021-06-05 16:50:56,031 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1358 transitions. Word has length 26 [2021-06-05 16:50:56,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:56,031 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1358 transitions. [2021-06-05 16:50:56,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 16:50:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1358 transitions. [2021-06-05 16:50:56,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:56,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:56,032 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:56,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:56,249 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:56,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:56,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1452966772, now seen corresponding path program 10 times [2021-06-05 16:50:56,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:56,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737645730] [2021-06-05 16:50:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:56,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:56,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:56,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737645730] [2021-06-05 16:50:56,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737645730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:56,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793906908] [2021-06-05 16:50:56,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:56,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:50:56,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:56,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:50:56,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:56,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793906908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:56,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:56,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:50:56,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428094337] [2021-06-05 16:50:56,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:50:56,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:56,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:50:56,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:50:56,396 INFO L87 Difference]: Start difference. First operand 421 states and 1358 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 16:50:56,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:56,798 INFO L93 Difference]: Finished difference Result 1207 states and 3549 transitions. [2021-06-05 16:50:56,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:50:56,799 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 26 [2021-06-05 16:50:56,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:56,803 INFO L225 Difference]: With dead ends: 1207 [2021-06-05 16:50:56,803 INFO L226 Difference]: Without dead ends: 1207 [2021-06-05 16:50:56,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 269.8ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:50:56,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-06-05 16:50:56,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 415. [2021-06-05 16:50:56,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.2294685990338166) internal successors, (1337), 414 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:56,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1337 transitions. [2021-06-05 16:50:56,814 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1337 transitions. Word has length 26 [2021-06-05 16:50:56,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:56,814 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1337 transitions. [2021-06-05 16:50:56,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 16:50:56,814 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1337 transitions. [2021-06-05 16:50:56,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:56,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:56,815 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:57,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:57,020 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:57,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:57,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2037994958, now seen corresponding path program 11 times [2021-06-05 16:50:57,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:57,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997748251] [2021-06-05 16:50:57,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:57,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:57,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997748251] [2021-06-05 16:50:57,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997748251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:57,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187185582] [2021-06-05 16:50:57,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:57,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:50:57,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:57,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:50:57,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:57,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187185582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:57,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:57,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:50:57,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166127972] [2021-06-05 16:50:57,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:50:57,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:57,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:50:57,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:50:57,157 INFO L87 Difference]: Start difference. First operand 415 states and 1337 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:57,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:57,361 INFO L93 Difference]: Finished difference Result 824 states and 2512 transitions. [2021-06-05 16:50:57,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:50:57,361 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 26 [2021-06-05 16:50:57,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:57,364 INFO L225 Difference]: With dead ends: 824 [2021-06-05 16:50:57,364 INFO L226 Difference]: Without dead ends: 812 [2021-06-05 16:50:57,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:50:57,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-05 16:50:57,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 433. [2021-06-05 16:50:57,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.2175925925925926) internal successors, (1390), 432 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1390 transitions. [2021-06-05 16:50:57,374 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1390 transitions. Word has length 26 [2021-06-05 16:50:57,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:57,374 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1390 transitions. [2021-06-05 16:50:57,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:57,374 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1390 transitions. [2021-06-05 16:50:57,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:57,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:57,375 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:57,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 16:50:57,592 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:57,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:57,592 INFO L82 PathProgramCache]: Analyzing trace with hash 545990226, now seen corresponding path program 12 times [2021-06-05 16:50:57,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:57,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602450160] [2021-06-05 16:50:57,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:57,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:57,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602450160] [2021-06-05 16:50:57,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602450160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:57,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402600768] [2021-06-05 16:50:57,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:57,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:50:57,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:57,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:50:57,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:57,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402600768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:57,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:57,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:50:57,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265488850] [2021-06-05 16:50:57,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:50:57,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:57,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:50:57,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:50:57,705 INFO L87 Difference]: Start difference. First operand 433 states and 1390 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:57,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:57,979 INFO L93 Difference]: Finished difference Result 999 states and 2955 transitions. [2021-06-05 16:50:57,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:50:57,979 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 26 [2021-06-05 16:50:57,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:57,982 INFO L225 Difference]: With dead ends: 999 [2021-06-05 16:50:57,982 INFO L226 Difference]: Without dead ends: 995 [2021-06-05 16:50:57,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:50:57,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-06-05 16:50:57,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 472. [2021-06-05 16:50:57,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.2229299363057327) internal successors, (1518), 471 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:57,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1518 transitions. [2021-06-05 16:50:57,993 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1518 transitions. Word has length 26 [2021-06-05 16:50:57,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:57,993 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1518 transitions. [2021-06-05 16:50:57,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:57,993 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1518 transitions. [2021-06-05 16:50:57,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:57,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:57,994 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:58,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 16:50:58,209 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:58,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:58,209 INFO L82 PathProgramCache]: Analyzing trace with hash 816499918, now seen corresponding path program 13 times [2021-06-05 16:50:58,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:58,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044358310] [2021-06-05 16:50:58,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:58,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:58,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044358310] [2021-06-05 16:50:58,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044358310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:58,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883526406] [2021-06-05 16:50:58,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:58,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:50:58,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:58,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883526406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:58,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:58,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:50:58,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053632313] [2021-06-05 16:50:58,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:50:58,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:58,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:50:58,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:50:58,344 INFO L87 Difference]: Start difference. First operand 472 states and 1518 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:58,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:58,690 INFO L93 Difference]: Finished difference Result 1053 states and 3099 transitions. [2021-06-05 16:50:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:50:58,690 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 26 [2021-06-05 16:50:58,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:58,694 INFO L225 Difference]: With dead ends: 1053 [2021-06-05 16:50:58,694 INFO L226 Difference]: Without dead ends: 1053 [2021-06-05 16:50:58,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:50:58,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-06-05 16:50:58,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 464. [2021-06-05 16:50:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.2311015118790496) internal successors, (1496), 463 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:58,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1496 transitions. [2021-06-05 16:50:58,704 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1496 transitions. Word has length 26 [2021-06-05 16:50:58,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:58,705 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1496 transitions. [2021-06-05 16:50:58,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:58,705 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1496 transitions. [2021-06-05 16:50:58,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:58,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:58,707 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:58,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 16:50:58,921 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:58,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:58,921 INFO L82 PathProgramCache]: Analyzing trace with hash -980752764, now seen corresponding path program 1 times [2021-06-05 16:50:58,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:58,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754536527] [2021-06-05 16:50:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:59,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:59,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754536527] [2021-06-05 16:50:59,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754536527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:59,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148797067] [2021-06-05 16:50:59,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2021-06-05 16:50:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:59,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 16:50:59,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:59,392 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 8 treesize of output 7 [2021-06-05 16:50:59,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:59,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:59,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:50:59,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:20 [2021-06-05 16:50:59,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:59,444 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 16 treesize of output 18 [2021-06-05 16:50:59,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:59,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:59,454 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 16:50:59,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:27 [2021-06-05 16:50:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:59,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148797067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:59,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:59,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 16:50:59,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639451983] [2021-06-05 16:50:59,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:50:59,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:59,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:50:59,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:50:59,516 INFO L87 Difference]: Start difference. First operand 464 states and 1496 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 16:50:59,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:59,965 INFO L93 Difference]: Finished difference Result 853 states and 2545 transitions. [2021-06-05 16:50:59,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:50:59,965 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 28 [2021-06-05 16:50:59,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:59,968 INFO L225 Difference]: With dead ends: 853 [2021-06-05 16:50:59,968 INFO L226 Difference]: Without dead ends: 766 [2021-06-05 16:50:59,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 520.3ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:50:59,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-06-05 16:50:59,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 490. [2021-06-05 16:50:59,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.216768916155419) internal successors, (1573), 489 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:59,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1573 transitions. [2021-06-05 16:50:59,977 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1573 transitions. Word has length 28 [2021-06-05 16:50:59,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:59,977 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1573 transitions. [2021-06-05 16:50:59,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 16:50:59,977 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1573 transitions. [2021-06-05 16:50:59,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:59,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:59,978 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:00,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:00,195 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:00,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:00,195 INFO L82 PathProgramCache]: Analyzing trace with hash 735427332, now seen corresponding path program 2 times [2021-06-05 16:51:00,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:00,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439475947] [2021-06-05 16:51:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:00,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:00,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439475947] [2021-06-05 16:51:00,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439475947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:00,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551538999] [2021-06-05 16:51:00,467 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 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 16:51:00,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:51:00,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:00,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 16:51:00,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:00,568 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 8 treesize of output 7 [2021-06-05 16:51:00,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:00,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:00,577 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 16:51:00,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-05 16:51:00,645 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 16:51:00,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:51:00,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:00,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:00,663 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 16:51:00,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:29 [2021-06-05 16:51:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:51:00,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551538999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:00,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:00,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 16:51:00,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768454608] [2021-06-05 16:51:00,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:51:00,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:00,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:51:00,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:51:00,745 INFO L87 Difference]: Start difference. First operand 490 states and 1573 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 16:51:02,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:02,070 INFO L93 Difference]: Finished difference Result 1130 states and 3345 transitions. [2021-06-05 16:51:02,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:51:02,070 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 28 [2021-06-05 16:51:02,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:02,073 INFO L225 Difference]: With dead ends: 1130 [2021-06-05 16:51:02,073 INFO L226 Difference]: Without dead ends: 998 [2021-06-05 16:51:02,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1239.5ms TimeCoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:51:02,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-06-05 16:51:02,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 537. [2021-06-05 16:51:02,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 3.1940298507462686) internal successors, (1712), 536 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:02,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1712 transitions. [2021-06-05 16:51:02,082 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1712 transitions. Word has length 28 [2021-06-05 16:51:02,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:02,082 INFO L482 AbstractCegarLoop]: Abstraction has 537 states and 1712 transitions. [2021-06-05 16:51:02,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 16:51:02,082 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1712 transitions. [2021-06-05 16:51:02,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:02,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:02,083 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:02,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 16:51:02,299 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:02,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:02,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1417721472, now seen corresponding path program 14 times [2021-06-05 16:51:02,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:02,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885261747] [2021-06-05 16:51:02,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:02,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:02,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885261747] [2021-06-05 16:51:02,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885261747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:02,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210911556] [2021-06-05 16:51:02,609 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) [2021-06-05 16:51:02,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:51:02,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:02,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:51:02,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:02,730 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 8 treesize of output 7 [2021-06-05 16:51:02,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:02,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:02,738 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 16:51:02,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-06-05 16:51:02,792 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 16:51:02,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:51:02,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:02,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:02,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:51:02,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-06-05 16:51:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:51:02,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210911556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:02,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:02,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 16:51:02,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108891450] [2021-06-05 16:51:02,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:51:02,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:02,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:51:02,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:51:02,897 INFO L87 Difference]: Start difference. First operand 537 states and 1712 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 16:51:04,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:04,136 INFO L93 Difference]: Finished difference Result 1024 states and 3050 transitions. [2021-06-05 16:51:04,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:51:04,136 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 16:51:04,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:04,138 INFO L225 Difference]: With dead ends: 1024 [2021-06-05 16:51:04,138 INFO L226 Difference]: Without dead ends: 946 [2021-06-05 16:51:04,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1118.1ms TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:51:04,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-05 16:51:04,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 637. [2021-06-05 16:51:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.10062893081761) internal successors, (1972), 636 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1972 transitions. [2021-06-05 16:51:04,166 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1972 transitions. Word has length 28 [2021-06-05 16:51:04,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:04,166 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 1972 transitions. [2021-06-05 16:51:04,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 16:51:04,167 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1972 transitions. [2021-06-05 16:51:04,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:04,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:04,168 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:04,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 16:51:04,387 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:04,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:04,387 INFO L82 PathProgramCache]: Analyzing trace with hash 916230348, now seen corresponding path program 3 times [2021-06-05 16:51:04,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:04,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030418724] [2021-06-05 16:51:04,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:04,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:04,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030418724] [2021-06-05 16:51:04,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030418724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:04,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893051589] [2021-06-05 16:51:04,682 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 16:51:04,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:51:04,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:04,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:51:04,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:04,783 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 8 treesize of output 7 [2021-06-05 16:51:04,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:04,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:04,792 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 16:51:04,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-05 16:51:04,835 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 16:51:04,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:51:04,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:04,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:04,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:51:04,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-06-05 16:51:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:51:04,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893051589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:04,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:04,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 16:51:04,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401037056] [2021-06-05 16:51:04,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:51:04,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:04,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:51:04,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:51:04,998 INFO L87 Difference]: Start difference. First operand 637 states and 1972 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 16:51:07,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:07,258 INFO L93 Difference]: Finished difference Result 1838 states and 5313 transitions. [2021-06-05 16:51:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:51:07,258 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 28 [2021-06-05 16:51:07,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:07,261 INFO L225 Difference]: With dead ends: 1838 [2021-06-05 16:51:07,261 INFO L226 Difference]: Without dead ends: 1655 [2021-06-05 16:51:07,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1847.6ms TimeCoverageRelationStatistics Valid=569, Invalid=3091, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:51:07,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-06-05 16:51:07,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 692. [2021-06-05 16:51:07,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.1577424023154848) internal successors, (2182), 691 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:07,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2182 transitions. [2021-06-05 16:51:07,277 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2182 transitions. Word has length 28 [2021-06-05 16:51:07,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:07,277 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 2182 transitions. [2021-06-05 16:51:07,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 16:51:07,278 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2182 transitions. [2021-06-05 16:51:07,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:07,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:07,279 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:07,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:07,493 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:07,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:07,493 INFO L82 PathProgramCache]: Analyzing trace with hash 937707268, now seen corresponding path program 15 times [2021-06-05 16:51:07,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:07,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562934824] [2021-06-05 16:51:07,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:07,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:07,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562934824] [2021-06-05 16:51:07,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562934824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:07,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555755763] [2021-06-05 16:51:07,768 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 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 16:51:07,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:51:07,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:07,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:51:07,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:07,888 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 8 treesize of output 7 [2021-06-05 16:51:07,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:07,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:07,897 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 16:51:07,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-05 16:51:07,967 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 16:51:07,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:51:07,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:07,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:07,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:51:07,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-06-05 16:51:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:51:08,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555755763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:08,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:08,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 16:51:08,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839400079] [2021-06-05 16:51:08,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:51:08,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:08,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:51:08,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:51:08,060 INFO L87 Difference]: Start difference. First operand 692 states and 2182 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 16:51:09,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:09,387 INFO L93 Difference]: Finished difference Result 1136 states and 3439 transitions. [2021-06-05 16:51:09,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:51:09,388 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 16:51:09,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:09,390 INFO L225 Difference]: With dead ends: 1136 [2021-06-05 16:51:09,390 INFO L226 Difference]: Without dead ends: 1058 [2021-06-05 16:51:09,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1152.2ms TimeCoverageRelationStatistics Valid=406, Invalid=2044, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:51:09,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-06-05 16:51:09,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 680. [2021-06-05 16:51:09,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.1723122238586154) internal successors, (2154), 679 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:09,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2154 transitions. [2021-06-05 16:51:09,400 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2154 transitions. Word has length 28 [2021-06-05 16:51:09,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:09,401 INFO L482 AbstractCegarLoop]: Abstraction has 680 states and 2154 transitions. [2021-06-05 16:51:09,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 16:51:09,401 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2154 transitions. [2021-06-05 16:51:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:09,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:09,402 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:09,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:09,607 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:09,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:09,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1490293068, now seen corresponding path program 16 times [2021-06-05 16:51:09,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:09,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842896768] [2021-06-05 16:51:09,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:09,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:09,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842896768] [2021-06-05 16:51:09,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842896768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:09,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961722429] [2021-06-05 16:51:09,861 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 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 16:51:09,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:51:09,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:09,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 16:51:09,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:10,041 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 16:51:10,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:10,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:10,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:51:10,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-06-05 16:51:10,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:10,108 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 20 treesize of output 22 [2021-06-05 16:51:10,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:10,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:10,118 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 16:51:10,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:31 [2021-06-05 16:51:10,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:10,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961722429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:10,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:10,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-06-05 16:51:10,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646963375] [2021-06-05 16:51:10,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:51:10,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:10,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:51:10,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:51:10,184 INFO L87 Difference]: Start difference. First operand 680 states and 2154 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:12,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:12,100 INFO L93 Difference]: Finished difference Result 1629 states and 4937 transitions. [2021-06-05 16:51:12,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:51:12,100 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:12,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:12,107 INFO L225 Difference]: With dead ends: 1629 [2021-06-05 16:51:12,107 INFO L226 Difference]: Without dead ends: 1293 [2021-06-05 16:51:12,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1725.1ms TimeCoverageRelationStatistics Valid=735, Invalid=3425, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:51:12,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-06-05 16:51:12,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 920. [2021-06-05 16:51:12,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.263329706202394) internal successors, (2999), 919 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:12,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2999 transitions. [2021-06-05 16:51:12,124 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2999 transitions. Word has length 28 [2021-06-05 16:51:12,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:12,124 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 2999 transitions. [2021-06-05 16:51:12,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:12,125 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2999 transitions. [2021-06-05 16:51:12,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:12,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:12,126 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:12,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:12,336 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:12,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:12,336 INFO L82 PathProgramCache]: Analyzing trace with hash -836691140, now seen corresponding path program 4 times [2021-06-05 16:51:12,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:12,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279619054] [2021-06-05 16:51:12,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:12,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:12,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279619054] [2021-06-05 16:51:12,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279619054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:12,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703591335] [2021-06-05 16:51:12,716 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 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 16:51:12,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:51:12,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:12,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 16:51:12,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:12,825 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 8 treesize of output 7 [2021-06-05 16:51:12,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:12,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:12,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:51:12,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:20 [2021-06-05 16:51:12,889 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 16:51:12,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:51:12,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:12,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:12,898 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 16:51:12,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:29 [2021-06-05 16:51:12,995 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 16:51:12,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703591335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:12,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:12,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 16:51:12,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528992990] [2021-06-05 16:51:12,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:51:12,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:12,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:51:12,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:51:12,996 INFO L87 Difference]: Start difference. First operand 920 states and 2999 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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 16:51:14,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:14,155 INFO L93 Difference]: Finished difference Result 1908 states and 5865 transitions. [2021-06-05 16:51:14,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:51:14,156 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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 16:51:14,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:14,159 INFO L225 Difference]: With dead ends: 1908 [2021-06-05 16:51:14,159 INFO L226 Difference]: Without dead ends: 1792 [2021-06-05 16:51:14,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1276.5ms TimeCoverageRelationStatistics Valid=320, Invalid=1402, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:51:14,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-06-05 16:51:14,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1049. [2021-06-05 16:51:14,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 3.25381679389313) internal successors, (3410), 1048 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:14,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3410 transitions. [2021-06-05 16:51:14,177 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3410 transitions. Word has length 28 [2021-06-05 16:51:14,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:14,178 INFO L482 AbstractCegarLoop]: Abstraction has 1049 states and 3410 transitions. [2021-06-05 16:51:14,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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 16:51:14,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3410 transitions. [2021-06-05 16:51:14,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:14,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:14,180 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:14,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 16:51:14,398 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:14,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:14,398 INFO L82 PathProgramCache]: Analyzing trace with hash -556203584, now seen corresponding path program 5 times [2021-06-05 16:51:14,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:14,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500489529] [2021-06-05 16:51:14,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:14,618 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 16:51:14,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:14,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500489529] [2021-06-05 16:51:14,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500489529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:14,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042100376] [2021-06-05 16:51:14,618 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 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 16:51:14,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:51:14,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:14,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 16:51:14,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:14,752 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 8 treesize of output 7 [2021-06-05 16:51:14,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:14,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:14,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:51:14,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-06-05 16:51:14,804 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 16:51:14,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:51:14,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:14,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:14,815 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 16:51:14,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:32 [2021-06-05 16:51:14,940 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 16:51:14,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042100376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:14,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:14,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 16:51:14,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693051512] [2021-06-05 16:51:14,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:51:14,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:14,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:51:14,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:51:14,941 INFO L87 Difference]: Start difference. First operand 1049 states and 3410 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 16:51:16,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:16,779 INFO L93 Difference]: Finished difference Result 1982 states and 6072 transitions. [2021-06-05 16:51:16,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:51:16,779 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 28 [2021-06-05 16:51:16,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:16,782 INFO L225 Difference]: With dead ends: 1982 [2021-06-05 16:51:16,782 INFO L226 Difference]: Without dead ends: 1756 [2021-06-05 16:51:16,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1660.5ms TimeCoverageRelationStatistics Valid=554, Invalid=2416, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:51:16,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-06-05 16:51:16,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1070. [2021-06-05 16:51:16,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 3.2198316183348923) internal successors, (3442), 1069 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 3442 transitions. [2021-06-05 16:51:16,814 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 3442 transitions. Word has length 28 [2021-06-05 16:51:16,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:16,815 INFO L482 AbstractCegarLoop]: Abstraction has 1070 states and 3442 transitions. [2021-06-05 16:51:16,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 16:51:16,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 3442 transitions. [2021-06-05 16:51:16,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:16,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:16,817 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:17,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 16:51:17,029 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:17,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:17,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1520630964, now seen corresponding path program 6 times [2021-06-05 16:51:17,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:17,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083545056] [2021-06-05 16:51:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:17,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:17,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083545056] [2021-06-05 16:51:17,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083545056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:17,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966402163] [2021-06-05 16:51:17,377 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 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 16:51:17,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:51:17,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:17,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 16:51:17,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:17,509 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 8 treesize of output 7 [2021-06-05 16:51:17,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:17,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:17,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:51:17,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-05 16:51:17,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:17,546 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 16 treesize of output 18 [2021-06-05 16:51:17,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:17,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:17,557 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 16:51:17,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-06-05 16:51:17,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:17,623 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-05 16:51:17,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 16:51:17,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:17,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:17,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:51:17,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-06-05 16:51:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:17,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966402163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:17,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:17,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-05 16:51:17,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017428884] [2021-06-05 16:51:17,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:51:17,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:17,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:51:17,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:51:17,800 INFO L87 Difference]: Start difference. First operand 1070 states and 3442 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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 16:51:19,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:19,362 INFO L93 Difference]: Finished difference Result 2007 states and 6151 transitions. [2021-06-05 16:51:19,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:51:19,362 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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 28 [2021-06-05 16:51:19,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:19,365 INFO L225 Difference]: With dead ends: 2007 [2021-06-05 16:51:19,365 INFO L226 Difference]: Without dead ends: 1842 [2021-06-05 16:51:19,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1381.9ms TimeCoverageRelationStatistics Valid=307, Invalid=2045, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:51:19,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-06-05 16:51:19,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1157. [2021-06-05 16:51:19,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 3.222318339100346) internal successors, (3725), 1156 states have internal predecessors, (3725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:19,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3725 transitions. [2021-06-05 16:51:19,386 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3725 transitions. Word has length 28 [2021-06-05 16:51:19,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:19,387 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 3725 transitions. [2021-06-05 16:51:19,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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 16:51:19,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3725 transitions. [2021-06-05 16:51:19,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:19,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:19,388 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:19,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:19,604 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:19,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:19,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1530790852, now seen corresponding path program 7 times [2021-06-05 16:51:19,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:19,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690562964] [2021-06-05 16:51:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:19,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:19,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690562964] [2021-06-05 16:51:19,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690562964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:19,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157854872] [2021-06-05 16:51:19,909 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 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 16:51:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:19,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 16:51:19,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:20,039 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 8 treesize of output 7 [2021-06-05 16:51:20,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:20,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:20,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:51:20,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 16:51:20,079 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 16:51:20,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:51:20,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:20,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:20,090 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 16:51:20,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:37 [2021-06-05 16:51:20,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,138 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-06-05 16:51:20,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 16:51:20,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:20,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:20,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:51:20,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:44 [2021-06-05 16:51:20,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:20,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157854872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:20,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:20,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 16:51:20,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400967278] [2021-06-05 16:51:20,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:51:20,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:20,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:51:20,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:51:20,319 INFO L87 Difference]: Start difference. First operand 1157 states and 3725 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 16:51:21,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:21,041 INFO L93 Difference]: Finished difference Result 2244 states and 7072 transitions. [2021-06-05 16:51:21,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:51:21,041 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 28 [2021-06-05 16:51:21,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:21,044 INFO L225 Difference]: With dead ends: 2244 [2021-06-05 16:51:21,044 INFO L226 Difference]: Without dead ends: 1887 [2021-06-05 16:51:21,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 780.8ms TimeCoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:51:21,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2021-06-05 16:51:21,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1173. [2021-06-05 16:51:21,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.2380546075085324) internal successors, (3795), 1172 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:21,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3795 transitions. [2021-06-05 16:51:21,064 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3795 transitions. Word has length 28 [2021-06-05 16:51:21,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:21,065 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3795 transitions. [2021-06-05 16:51:21,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 16:51:21,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3795 transitions. [2021-06-05 16:51:21,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:21,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:21,066 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:21,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 16:51:21,281 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:21,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:21,281 INFO L82 PathProgramCache]: Analyzing trace with hash 55569732, now seen corresponding path program 8 times [2021-06-05 16:51:21,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:21,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507233620] [2021-06-05 16:51:21,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:21,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:21,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507233620] [2021-06-05 16:51:21,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507233620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:21,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420231368] [2021-06-05 16:51:21,666 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 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 16:51:21,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:51:21,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:21,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:51:21,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:21,785 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 8 treesize of output 7 [2021-06-05 16:51:21,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:21,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:21,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:51:21,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-06-05 16:51:21,837 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 16:51:21,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:51:21,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:21,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:21,862 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 16:51:21,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:29 [2021-06-05 16:51:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:21,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420231368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:21,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:21,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-06-05 16:51:21,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386967079] [2021-06-05 16:51:21,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:51:21,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:21,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:51:21,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:51:21,969 INFO L87 Difference]: Start difference. First operand 1173 states and 3795 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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 16:51:22,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:22,622 INFO L93 Difference]: Finished difference Result 2027 states and 6489 transitions. [2021-06-05 16:51:22,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:51:22,622 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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 28 [2021-06-05 16:51:22,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:22,625 INFO L225 Difference]: With dead ends: 2027 [2021-06-05 16:51:22,625 INFO L226 Difference]: Without dead ends: 1705 [2021-06-05 16:51:22,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 790.5ms TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:51:22,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-06-05 16:51:22,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1135. [2021-06-05 16:51:22,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 3.236331569664903) internal successors, (3670), 1134 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:22,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 3670 transitions. [2021-06-05 16:51:22,642 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 3670 transitions. Word has length 28 [2021-06-05 16:51:22,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:22,642 INFO L482 AbstractCegarLoop]: Abstraction has 1135 states and 3670 transitions. [2021-06-05 16:51:22,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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 16:51:22,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 3670 transitions. [2021-06-05 16:51:22,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:22,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:22,644 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:22,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:22,857 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:22,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:22,857 INFO L82 PathProgramCache]: Analyzing trace with hash 915430826, now seen corresponding path program 9 times [2021-06-05 16:51:22,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:22,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133420791] [2021-06-05 16:51:22,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:22,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:22,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133420791] [2021-06-05 16:51:22,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133420791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:22,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713361649] [2021-06-05 16:51:22,905 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 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 16:51:22,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:51:22,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:22,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:22,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:23,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713361649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:23,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:23,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:51:23,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132634027] [2021-06-05 16:51:23,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:51:23,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:23,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:51:23,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:51:23,024 INFO L87 Difference]: Start difference. First operand 1135 states and 3670 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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 16:51:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:24,232 INFO L93 Difference]: Finished difference Result 5166 states and 15294 transitions. [2021-06-05 16:51:24,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:51:24,232 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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 16:51:24,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:24,239 INFO L225 Difference]: With dead ends: 5166 [2021-06-05 16:51:24,240 INFO L226 Difference]: Without dead ends: 5166 [2021-06-05 16:51:24,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2985 ImplicationChecksByTransitivity, 834.3ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 16:51:24,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2021-06-05 16:51:24,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 1295. [2021-06-05 16:51:24,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 3.3377125193199384) internal successors, (4319), 1294 states have internal predecessors, (4319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 4319 transitions. [2021-06-05 16:51:24,282 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 4319 transitions. Word has length 30 [2021-06-05 16:51:24,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:24,282 INFO L482 AbstractCegarLoop]: Abstraction has 1295 states and 4319 transitions. [2021-06-05 16:51:24,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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 16:51:24,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 4319 transitions. [2021-06-05 16:51:24,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:24,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:24,284 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:24,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 16:51:24,497 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:24,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:24,497 INFO L82 PathProgramCache]: Analyzing trace with hash 930891622, now seen corresponding path program 10 times [2021-06-05 16:51:24,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:24,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030133524] [2021-06-05 16:51:24,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:24,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:24,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030133524] [2021-06-05 16:51:24,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030133524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:24,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568775961] [2021-06-05 16:51:24,542 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 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 16:51:24,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:51:24,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:24,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:24,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:24,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:24,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568775961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:24,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:24,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:51:24,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149446600] [2021-06-05 16:51:24,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:51:24,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:24,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:51:24,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:51:24,667 INFO L87 Difference]: Start difference. First operand 1295 states and 4319 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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 16:51:25,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:25,962 INFO L93 Difference]: Finished difference Result 5273 states and 15409 transitions. [2021-06-05 16:51:25,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 16:51:25,962 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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 16:51:25,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:25,969 INFO L225 Difference]: With dead ends: 5273 [2021-06-05 16:51:25,970 INFO L226 Difference]: Without dead ends: 5273 [2021-06-05 16:51:25,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3083 ImplicationChecksByTransitivity, 840.0ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 16:51:25,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5273 states. [2021-06-05 16:51:26,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5273 to 1261. [2021-06-05 16:51:26,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.3119047619047617) internal successors, (4173), 1260 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:26,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4173 transitions. [2021-06-05 16:51:26,010 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4173 transitions. Word has length 30 [2021-06-05 16:51:26,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:26,010 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 4173 transitions. [2021-06-05 16:51:26,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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 16:51:26,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4173 transitions. [2021-06-05 16:51:26,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:26,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:26,012 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:26,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 16:51:26,222 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:26,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:26,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1624165858, now seen corresponding path program 11 times [2021-06-05 16:51:26,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:26,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781775843] [2021-06-05 16:51:26,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:26,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:26,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781775843] [2021-06-05 16:51:26,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781775843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:26,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027015086] [2021-06-05 16:51:26,258 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 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 16:51:26,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:51:26,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:26,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:26,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:26,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027015086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:26,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:26,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:51:26,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227272256] [2021-06-05 16:51:26,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:51:26,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:26,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:51:26,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:51:26,372 INFO L87 Difference]: Start difference. First operand 1261 states and 4173 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:27,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:27,121 INFO L93 Difference]: Finished difference Result 3862 states and 11266 transitions. [2021-06-05 16:51:27,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:51:27,122 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 30 [2021-06-05 16:51:27,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:27,127 INFO L225 Difference]: With dead ends: 3862 [2021-06-05 16:51:27,127 INFO L226 Difference]: Without dead ends: 3862 [2021-06-05 16:51:27,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 470.1ms TimeCoverageRelationStatistics Valid=747, Invalid=2793, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:51:27,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-06-05 16:51:27,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 1267. [2021-06-05 16:51:27,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 3.3143759873617693) internal successors, (4196), 1266 states have internal predecessors, (4196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:27,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 4196 transitions. [2021-06-05 16:51:27,152 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 4196 transitions. Word has length 30 [2021-06-05 16:51:27,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:27,153 INFO L482 AbstractCegarLoop]: Abstraction has 1267 states and 4196 transitions. [2021-06-05 16:51:27,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:27,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 4196 transitions. [2021-06-05 16:51:27,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:27,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:27,155 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:27,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 16:51:27,366 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:27,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:27,367 INFO L82 PathProgramCache]: Analyzing trace with hash 568788464, now seen corresponding path program 12 times [2021-06-05 16:51:27,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:27,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014927284] [2021-06-05 16:51:27,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:27,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:27,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014927284] [2021-06-05 16:51:27,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014927284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:27,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758531227] [2021-06-05 16:51:27,398 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 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 16:51:27,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:51:27,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:27,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:27,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:27,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:27,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758531227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:27,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:27,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:51:27,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290116718] [2021-06-05 16:51:27,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:51:27,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:27,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:51:27,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:51:27,511 INFO L87 Difference]: Start difference. First operand 1267 states and 4196 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:28,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:28,274 INFO L93 Difference]: Finished difference Result 3689 states and 10863 transitions. [2021-06-05 16:51:28,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:51:28,274 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 30 [2021-06-05 16:51:28,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:28,294 INFO L225 Difference]: With dead ends: 3689 [2021-06-05 16:51:28,294 INFO L226 Difference]: Without dead ends: 3673 [2021-06-05 16:51:28,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 464.0ms TimeCoverageRelationStatistics Valid=710, Invalid=2482, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:51:28,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3673 states. [2021-06-05 16:51:28,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3673 to 1255. [2021-06-05 16:51:28,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 3.3038277511961724) internal successors, (4143), 1254 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:28,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 4143 transitions. [2021-06-05 16:51:28,356 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 4143 transitions. Word has length 30 [2021-06-05 16:51:28,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:28,356 INFO L482 AbstractCegarLoop]: Abstraction has 1255 states and 4143 transitions. [2021-06-05 16:51:28,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:28,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 4143 transitions. [2021-06-05 16:51:28,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:28,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:28,368 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:28,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:28,584 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:28,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:28,584 INFO L82 PathProgramCache]: Analyzing trace with hash -707538508, now seen corresponding path program 13 times [2021-06-05 16:51:28,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:28,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883759080] [2021-06-05 16:51:28,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:28,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:28,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883759080] [2021-06-05 16:51:28,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883759080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:28,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144044353] [2021-06-05 16:51:28,621 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 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 16:51:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:28,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:28,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:28,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144044353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:28,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:28,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:51:28,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251533606] [2021-06-05 16:51:28,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:51:28,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:28,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:51:28,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:51:28,740 INFO L87 Difference]: Start difference. First operand 1255 states and 4143 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 16:51:29,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:29,402 INFO L93 Difference]: Finished difference Result 4077 states and 11802 transitions. [2021-06-05 16:51:29,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:51:29,403 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 30 [2021-06-05 16:51:29,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:29,408 INFO L225 Difference]: With dead ends: 4077 [2021-06-05 16:51:29,408 INFO L226 Difference]: Without dead ends: 4053 [2021-06-05 16:51:29,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 393.6ms TimeCoverageRelationStatistics Valid=680, Invalid=2400, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:51:29,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2021-06-05 16:51:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 1269. [2021-06-05 16:51:29,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 3.2981072555205047) internal successors, (4182), 1268 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:29,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 4182 transitions. [2021-06-05 16:51:29,439 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 4182 transitions. Word has length 30 [2021-06-05 16:51:29,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:29,439 INFO L482 AbstractCegarLoop]: Abstraction has 1269 states and 4182 transitions. [2021-06-05 16:51:29,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 16:51:29,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 4182 transitions. [2021-06-05 16:51:29,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:29,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:29,441 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:29,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 16:51:29,653 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:29,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:29,654 INFO L82 PathProgramCache]: Analyzing trace with hash -437028816, now seen corresponding path program 14 times [2021-06-05 16:51:29,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:29,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338610813] [2021-06-05 16:51:29,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:29,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:29,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338610813] [2021-06-05 16:51:29,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338610813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:29,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138181082] [2021-06-05 16:51:29,686 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 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 16:51:29,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:51:29,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:29,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:29,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:29,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138181082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:29,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:29,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:51:29,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147470854] [2021-06-05 16:51:29,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:51:29,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:29,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:51:29,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:51:29,798 INFO L87 Difference]: Start difference. First operand 1269 states and 4182 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 16:51:30,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:30,529 INFO L93 Difference]: Finished difference Result 4229 states and 12165 transitions. [2021-06-05 16:51:30,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 16:51:30,529 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 30 [2021-06-05 16:51:30,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:30,534 INFO L225 Difference]: With dead ends: 4229 [2021-06-05 16:51:30,534 INFO L226 Difference]: Without dead ends: 4229 [2021-06-05 16:51:30,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 462.9ms TimeCoverageRelationStatistics Valid=757, Invalid=2783, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:51:30,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2021-06-05 16:51:30,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 1092. [2021-06-05 16:51:30,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 3.1631530705774518) internal successors, (3451), 1091 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:30,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 3451 transitions. [2021-06-05 16:51:30,563 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 3451 transitions. Word has length 30 [2021-06-05 16:51:30,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:30,563 INFO L482 AbstractCegarLoop]: Abstraction has 1092 states and 3451 transitions. [2021-06-05 16:51:30,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 16:51:30,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 3451 transitions. [2021-06-05 16:51:30,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:30,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:30,565 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:30,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:30,780 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:30,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:30,781 INFO L82 PathProgramCache]: Analyzing trace with hash 333072554, now seen corresponding path program 15 times [2021-06-05 16:51:30,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:30,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648867193] [2021-06-05 16:51:30,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:30,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:30,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:30,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:30,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648867193] [2021-06-05 16:51:30,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648867193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:30,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564834554] [2021-06-05 16:51:30,813 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 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 16:51:30,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:51:30,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:30,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:30,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:30,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564834554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:30,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:30,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:51:30,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022516924] [2021-06-05 16:51:30,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:51:30,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:30,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:51:30,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:51:30,928 INFO L87 Difference]: Start difference. First operand 1092 states and 3451 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:31,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:31,709 INFO L93 Difference]: Finished difference Result 3880 states and 11526 transitions. [2021-06-05 16:51:31,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:51:31,709 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 30 [2021-06-05 16:51:31,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:31,715 INFO L225 Difference]: With dead ends: 3880 [2021-06-05 16:51:31,715 INFO L226 Difference]: Without dead ends: 3880 [2021-06-05 16:51:31,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 541.8ms TimeCoverageRelationStatistics Valid=788, Invalid=3244, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:51:31,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2021-06-05 16:51:31,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 1361. [2021-06-05 16:51:31,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.2536764705882355) internal successors, (4425), 1360 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:31,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4425 transitions. [2021-06-05 16:51:31,749 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4425 transitions. Word has length 30 [2021-06-05 16:51:31,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:31,749 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4425 transitions. [2021-06-05 16:51:31,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:31,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4425 transitions. [2021-06-05 16:51:31,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:31,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:31,751 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:31,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 16:51:31,967 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:31,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:31,967 INFO L82 PathProgramCache]: Analyzing trace with hash -722304840, now seen corresponding path program 16 times [2021-06-05 16:51:31,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:31,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518754989] [2021-06-05 16:51:31,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:31,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:31,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:31,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518754989] [2021-06-05 16:51:31,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518754989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:31,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573515356] [2021-06-05 16:51:31,997 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 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 16:51:32,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:51:32,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:32,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:32,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:32,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573515356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:32,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:32,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:51:32,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939360625] [2021-06-05 16:51:32,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:51:32,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:32,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:51:32,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:51:32,111 INFO L87 Difference]: Start difference. First operand 1361 states and 4425 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:32,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:32,812 INFO L93 Difference]: Finished difference Result 3700 states and 11089 transitions. [2021-06-05 16:51:32,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 16:51:32,813 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 30 [2021-06-05 16:51:32,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:32,817 INFO L225 Difference]: With dead ends: 3700 [2021-06-05 16:51:32,817 INFO L226 Difference]: Without dead ends: 3684 [2021-06-05 16:51:32,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 469.9ms TimeCoverageRelationStatistics Valid=675, Invalid=2517, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:51:32,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3684 states. [2021-06-05 16:51:32,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3684 to 1355. [2021-06-05 16:51:32,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 3.2511078286558344) internal successors, (4402), 1354 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:32,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 4402 transitions. [2021-06-05 16:51:32,847 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 4402 transitions. Word has length 30 [2021-06-05 16:51:32,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:32,847 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 4402 transitions. [2021-06-05 16:51:32,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:32,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 4402 transitions. [2021-06-05 16:51:32,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:32,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:32,849 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:33,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 16:51:33,062 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:33,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:33,063 INFO L82 PathProgramCache]: Analyzing trace with hash 760830098, now seen corresponding path program 17 times [2021-06-05 16:51:33,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:33,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497867227] [2021-06-05 16:51:33,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:33,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:33,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497867227] [2021-06-05 16:51:33,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497867227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:33,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845538786] [2021-06-05 16:51:33,097 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 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 16:51:33,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:51:33,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:33,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:33,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:33,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845538786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:33,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:33,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:51:33,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017967511] [2021-06-05 16:51:33,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:51:33,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:33,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:51:33,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:51:33,203 INFO L87 Difference]: Start difference. First operand 1355 states and 4402 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 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 16:51:33,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:33,857 INFO L93 Difference]: Finished difference Result 3586 states and 10726 transitions. [2021-06-05 16:51:33,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:51:33,857 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 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 30 [2021-06-05 16:51:33,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:33,861 INFO L225 Difference]: With dead ends: 3586 [2021-06-05 16:51:33,861 INFO L226 Difference]: Without dead ends: 3538 [2021-06-05 16:51:33,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 402.9ms TimeCoverageRelationStatistics Valid=596, Invalid=2160, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:51:33,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2021-06-05 16:51:33,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 1367. [2021-06-05 16:51:33,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.2423133235724744) internal successors, (4429), 1366 states have internal predecessors, (4429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:33,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4429 transitions. [2021-06-05 16:51:33,886 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4429 transitions. Word has length 30 [2021-06-05 16:51:33,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:33,886 INFO L482 AbstractCegarLoop]: Abstraction has 1367 states and 4429 transitions. [2021-06-05 16:51:33,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 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 16:51:33,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4429 transitions. [2021-06-05 16:51:33,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:33,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:33,888 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:34,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 16:51:34,089 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:34,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:34,089 INFO L82 PathProgramCache]: Analyzing trace with hash -150600370, now seen corresponding path program 18 times [2021-06-05 16:51:34,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:34,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148777784] [2021-06-05 16:51:34,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:34,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:34,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148777784] [2021-06-05 16:51:34,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148777784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:34,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860111461] [2021-06-05 16:51:34,126 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 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 16:51:34,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:51:34,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:34,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:34,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:34,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:34,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860111461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:34,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:34,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:51:34,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646470065] [2021-06-05 16:51:34,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:51:34,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:34,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:51:34,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:51:34,217 INFO L87 Difference]: Start difference. First operand 1367 states and 4429 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 16:51:34,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:34,859 INFO L93 Difference]: Finished difference Result 3947 states and 11608 transitions. [2021-06-05 16:51:34,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:51:34,859 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 30 [2021-06-05 16:51:34,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:34,865 INFO L225 Difference]: With dead ends: 3947 [2021-06-05 16:51:34,865 INFO L226 Difference]: Without dead ends: 3871 [2021-06-05 16:51:34,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 386.7ms TimeCoverageRelationStatistics Valid=584, Invalid=2172, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:51:34,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-06-05 16:51:34,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 1381. [2021-06-05 16:51:34,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 3.2405797101449276) internal successors, (4472), 1380 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4472 transitions. [2021-06-05 16:51:34,897 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4472 transitions. Word has length 30 [2021-06-05 16:51:34,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:34,897 INFO L482 AbstractCegarLoop]: Abstraction has 1381 states and 4472 transitions. [2021-06-05 16:51:34,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 16:51:34,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4472 transitions. [2021-06-05 16:51:34,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:34,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:34,899 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:35,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 16:51:35,113 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:35,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:35,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1642605102, now seen corresponding path program 19 times [2021-06-05 16:51:35,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:35,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091785113] [2021-06-05 16:51:35,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:35,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:35,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091785113] [2021-06-05 16:51:35,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091785113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:35,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532080183] [2021-06-05 16:51:35,143 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 16:51:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:35,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:35,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:35,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532080183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:35,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:35,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:51:35,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650037248] [2021-06-05 16:51:35,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:51:35,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:35,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:51:35,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:51:35,236 INFO L87 Difference]: Start difference. First operand 1381 states and 4472 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 16:51:35,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:35,872 INFO L93 Difference]: Finished difference Result 3759 states and 11296 transitions. [2021-06-05 16:51:35,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:51:35,873 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 30 [2021-06-05 16:51:35,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:35,878 INFO L225 Difference]: With dead ends: 3759 [2021-06-05 16:51:35,878 INFO L226 Difference]: Without dead ends: 3739 [2021-06-05 16:51:35,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 411.7ms TimeCoverageRelationStatistics Valid=649, Invalid=2431, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:51:35,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-06-05 16:51:35,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 1571. [2021-06-05 16:51:35,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 3.186624203821656) internal successors, (5003), 1570 states have internal predecessors, (5003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 5003 transitions. [2021-06-05 16:51:35,907 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 5003 transitions. Word has length 30 [2021-06-05 16:51:35,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:35,907 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 5003 transitions. [2021-06-05 16:51:35,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 16:51:35,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 5003 transitions. [2021-06-05 16:51:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:35,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:35,909 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:36,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 16:51:36,110 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:36,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:36,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1372095410, now seen corresponding path program 20 times [2021-06-05 16:51:36,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:36,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637989159] [2021-06-05 16:51:36,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:36,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:36,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637989159] [2021-06-05 16:51:36,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637989159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:36,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819139354] [2021-06-05 16:51:36,145 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 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 16:51:36,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:51:36,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:36,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:36,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:36,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819139354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:36,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:36,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:51:36,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587648431] [2021-06-05 16:51:36,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:51:36,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:36,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:51:36,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:51:36,262 INFO L87 Difference]: Start difference. First operand 1571 states and 5003 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 16:51:37,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:37,132 INFO L93 Difference]: Finished difference Result 4002 states and 11899 transitions. [2021-06-05 16:51:37,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:51:37,133 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 30 [2021-06-05 16:51:37,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:37,137 INFO L225 Difference]: With dead ends: 4002 [2021-06-05 16:51:37,137 INFO L226 Difference]: Without dead ends: 4002 [2021-06-05 16:51:37,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 581.8ms TimeCoverageRelationStatistics Valid=869, Invalid=3291, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:51:37,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4002 states. [2021-06-05 16:51:37,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4002 to 1386. [2021-06-05 16:51:37,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.2368231046931406) internal successors, (4483), 1385 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:37,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4483 transitions. [2021-06-05 16:51:37,165 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4483 transitions. Word has length 30 [2021-06-05 16:51:37,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:37,165 INFO L482 AbstractCegarLoop]: Abstraction has 1386 states and 4483 transitions. [2021-06-05 16:51:37,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 16:51:37,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4483 transitions. [2021-06-05 16:51:37,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:37,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:37,167 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:37,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 16:51:37,383 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:37,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:37,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1532772694, now seen corresponding path program 21 times [2021-06-05 16:51:37,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:37,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361024450] [2021-06-05 16:51:37,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:37,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:37,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:37,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361024450] [2021-06-05 16:51:37,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361024450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:37,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280258175] [2021-06-05 16:51:37,427 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 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 16:51:37,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:51:37,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:37,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:37,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:37,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280258175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:37,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:37,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:51:37,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132717957] [2021-06-05 16:51:37,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:51:37,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:37,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:51:37,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:51:37,565 INFO L87 Difference]: Start difference. First operand 1386 states and 4483 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 16:51:38,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:38,680 INFO L93 Difference]: Finished difference Result 5413 states and 16415 transitions. [2021-06-05 16:51:38,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 16:51:38,681 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 30 [2021-06-05 16:51:38,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:38,689 INFO L225 Difference]: With dead ends: 5413 [2021-06-05 16:51:38,689 INFO L226 Difference]: Without dead ends: 5413 [2021-06-05 16:51:38,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2469 ImplicationChecksByTransitivity, 787.8ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 16:51:38,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-06-05 16:51:38,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 1890. [2021-06-05 16:51:38,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.338803599788248) internal successors, (6307), 1889 states have internal predecessors, (6307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:38,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6307 transitions. [2021-06-05 16:51:38,739 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6307 transitions. Word has length 30 [2021-06-05 16:51:38,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:38,739 INFO L482 AbstractCegarLoop]: Abstraction has 1890 states and 6307 transitions. [2021-06-05 16:51:38,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 16:51:38,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6307 transitions. [2021-06-05 16:51:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:38,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:38,742 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:38,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 16:51:38,942 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:38,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:38,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1706817208, now seen corresponding path program 22 times [2021-06-05 16:51:38,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:38,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838205678] [2021-06-05 16:51:38,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:38,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:38,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838205678] [2021-06-05 16:51:38,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838205678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:38,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620391588] [2021-06-05 16:51:38,981 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 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 16:51:39,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:51:39,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:39,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:39,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:39,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620391588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:39,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:39,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:51:39,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128260756] [2021-06-05 16:51:39,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:51:39,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:39,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:51:39,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:51:39,115 INFO L87 Difference]: Start difference. First operand 1890 states and 6307 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 16:51:40,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:40,049 INFO L93 Difference]: Finished difference Result 5130 states and 15678 transitions. [2021-06-05 16:51:40,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:51:40,050 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 30 [2021-06-05 16:51:40,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:40,056 INFO L225 Difference]: With dead ends: 5130 [2021-06-05 16:51:40,056 INFO L226 Difference]: Without dead ends: 5114 [2021-06-05 16:51:40,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 642.5ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:51:40,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5114 states. [2021-06-05 16:51:40,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5114 to 1830. [2021-06-05 16:51:40,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1829 states have (on average 3.348824494259158) internal successors, (6125), 1829 states have internal predecessors, (6125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:40,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 6125 transitions. [2021-06-05 16:51:40,095 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 6125 transitions. Word has length 30 [2021-06-05 16:51:40,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:40,095 INFO L482 AbstractCegarLoop]: Abstraction has 1830 states and 6125 transitions. [2021-06-05 16:51:40,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 16:51:40,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 6125 transitions. [2021-06-05 16:51:40,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:40,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:40,097 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:40,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 16:51:40,305 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:40,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:40,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1105015150, now seen corresponding path program 23 times [2021-06-05 16:51:40,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:40,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691151138] [2021-06-05 16:51:40,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:40,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:40,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691151138] [2021-06-05 16:51:40,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691151138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:40,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077776963] [2021-06-05 16:51:40,342 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 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 16:51:40,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:51:40,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:40,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:40,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:40,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077776963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:40,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:40,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:51:40,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207155165] [2021-06-05 16:51:40,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:51:40,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:40,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:51:40,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:51:40,454 INFO L87 Difference]: Start difference. First operand 1830 states and 6125 transitions. Second operand has 16 states, 16 states have (on average 2.9375) 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 16:51:41,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:41,254 INFO L93 Difference]: Finished difference Result 4815 states and 14976 transitions. [2021-06-05 16:51:41,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 16:51:41,255 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) 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 30 [2021-06-05 16:51:41,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:41,262 INFO L225 Difference]: With dead ends: 4815 [2021-06-05 16:51:41,262 INFO L226 Difference]: Without dead ends: 4767 [2021-06-05 16:51:41,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 526.4ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:51:41,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4767 states. [2021-06-05 16:51:41,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4767 to 1882. [2021-06-05 16:51:41,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.334928229665072) internal successors, (6273), 1881 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:41,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 6273 transitions. [2021-06-05 16:51:41,301 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 6273 transitions. Word has length 30 [2021-06-05 16:51:41,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:41,301 INFO L482 AbstractCegarLoop]: Abstraction has 1882 states and 6273 transitions. [2021-06-05 16:51:41,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) 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 16:51:41,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 6273 transitions. [2021-06-05 16:51:41,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:41,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:41,304 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:41,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:41,505 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:41,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:41,505 INFO L82 PathProgramCache]: Analyzing trace with hash 441056662, now seen corresponding path program 24 times [2021-06-05 16:51:41,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:41,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930186611] [2021-06-05 16:51:41,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:41,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:41,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930186611] [2021-06-05 16:51:41,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930186611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:41,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865164594] [2021-06-05 16:51:41,548 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 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 16:51:41,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:51:41,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:41,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:41,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:41,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:41,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865164594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:41,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:41,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:51:41,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732823290] [2021-06-05 16:51:41,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:51:41,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:41,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:51:41,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:51:41,639 INFO L87 Difference]: Start difference. First operand 1882 states and 6273 transitions. Second operand has 15 states, 15 states have (on average 3.0) 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 16:51:42,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:42,380 INFO L93 Difference]: Finished difference Result 4941 states and 15164 transitions. [2021-06-05 16:51:42,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:51:42,380 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) 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 30 [2021-06-05 16:51:42,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:42,387 INFO L225 Difference]: With dead ends: 4941 [2021-06-05 16:51:42,387 INFO L226 Difference]: Without dead ends: 4861 [2021-06-05 16:51:42,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 488.7ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:51:42,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2021-06-05 16:51:42,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 2178. [2021-06-05 16:51:42,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 3.3674781809830043) internal successors, (7331), 2177 states have internal predecessors, (7331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:42,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 7331 transitions. [2021-06-05 16:51:42,440 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 7331 transitions. Word has length 30 [2021-06-05 16:51:42,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:42,440 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 7331 transitions. [2021-06-05 16:51:42,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) 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 16:51:42,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 7331 transitions. [2021-06-05 16:51:42,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:42,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:42,443 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:42,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:42,658 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:42,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:42,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1158883238, now seen corresponding path program 25 times [2021-06-05 16:51:42,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:42,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508825884] [2021-06-05 16:51:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:42,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:42,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508825884] [2021-06-05 16:51:42,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508825884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:42,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375934284] [2021-06-05 16:51:42,688 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 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 16:51:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:42,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:42,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:42,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375934284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:42,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:42,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:51:42,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241657992] [2021-06-05 16:51:42,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:51:42,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:42,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:51:42,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:51:42,816 INFO L87 Difference]: Start difference. First operand 2178 states and 7331 transitions. Second operand has 16 states, 16 states have (on average 3.0) 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 16:51:43,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:43,616 INFO L93 Difference]: Finished difference Result 6842 states and 21215 transitions. [2021-06-05 16:51:43,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:51:43,616 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) 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 30 [2021-06-05 16:51:43,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:43,625 INFO L225 Difference]: With dead ends: 6842 [2021-06-05 16:51:43,625 INFO L226 Difference]: Without dead ends: 6842 [2021-06-05 16:51:43,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 510.0ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:51:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6842 states. [2021-06-05 16:51:43,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6842 to 2474. [2021-06-05 16:51:43,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2474 states, 2473 states have (on average 3.4488475535786494) internal successors, (8529), 2473 states have internal predecessors, (8529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:43,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 8529 transitions. [2021-06-05 16:51:43,687 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 8529 transitions. Word has length 30 [2021-06-05 16:51:43,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:43,687 INFO L482 AbstractCegarLoop]: Abstraction has 2474 states and 8529 transitions. [2021-06-05 16:51:43,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) 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 16:51:43,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 8529 transitions. [2021-06-05 16:51:43,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:43,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:43,691 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:43,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 16:51:43,898 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:43,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:43,898 INFO L82 PathProgramCache]: Analyzing trace with hash 103505844, now seen corresponding path program 26 times [2021-06-05 16:51:43,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:43,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348874567] [2021-06-05 16:51:43,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:43,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:43,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348874567] [2021-06-05 16:51:43,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348874567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:43,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29779387] [2021-06-05 16:51:43,927 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 16:51:43,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:51:43,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:43,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:43,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:44,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29779387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:44,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:44,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:51:44,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98581359] [2021-06-05 16:51:44,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:51:44,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:44,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:51:44,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:51:44,051 INFO L87 Difference]: Start difference. First operand 2474 states and 8529 transitions. Second operand has 16 states, 16 states have (on average 3.0) 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 16:51:44,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:44,779 INFO L93 Difference]: Finished difference Result 6641 states and 20706 transitions. [2021-06-05 16:51:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:51:44,780 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) 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 30 [2021-06-05 16:51:44,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:44,788 INFO L225 Difference]: With dead ends: 6641 [2021-06-05 16:51:44,790 INFO L226 Difference]: Without dead ends: 6617 [2021-06-05 16:51:44,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 464.6ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:51:44,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6617 states. [2021-06-05 16:51:44,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6617 to 2462. [2021-06-05 16:51:44,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2461 states have (on average 3.4461600975213327) internal successors, (8481), 2461 states have internal predecessors, (8481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:44,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 8481 transitions. [2021-06-05 16:51:44,846 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 8481 transitions. Word has length 30 [2021-06-05 16:51:44,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:44,846 INFO L482 AbstractCegarLoop]: Abstraction has 2462 states and 8481 transitions. [2021-06-05 16:51:44,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) 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 16:51:44,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 8481 transitions. [2021-06-05 16:51:44,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:44,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:44,850 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:45,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:45,050 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:45,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:45,050 INFO L82 PathProgramCache]: Analyzing trace with hash 954749098, now seen corresponding path program 27 times [2021-06-05 16:51:45,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:45,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854839091] [2021-06-05 16:51:45,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:45,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:45,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854839091] [2021-06-05 16:51:45,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854839091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:45,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774458209] [2021-06-05 16:51:45,080 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 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 16:51:45,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:51:45,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:45,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 16:51:45,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:45,184 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 16:51:45,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:45,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:45,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:51:45,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 16:51:45,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:45,263 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 20 treesize of output 22 [2021-06-05 16:51:45,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:45,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:45,274 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 16:51:45,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:41 [2021-06-05 16:51:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:45,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774458209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:45,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:45,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-06-05 16:51:45,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562978753] [2021-06-05 16:51:45,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:51:45,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:45,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:51:45,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:51:45,377 INFO L87 Difference]: Start difference. First operand 2462 states and 8481 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:49,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:49,323 INFO L93 Difference]: Finished difference Result 7094 states and 21992 transitions. [2021-06-05 16:51:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-06-05 16:51:49,324 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have 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 16:51:49,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:49,333 INFO L225 Difference]: With dead ends: 7094 [2021-06-05 16:51:49,333 INFO L226 Difference]: Without dead ends: 7094 [2021-06-05 16:51:49,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7400 ImplicationChecksByTransitivity, 3179.7ms TimeCoverageRelationStatistics Valid=2804, Invalid=16656, Unknown=0, NotChecked=0, Total=19460 [2021-06-05 16:51:49,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7094 states. [2021-06-05 16:51:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7094 to 2546. [2021-06-05 16:51:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 2545 states have (on average 3.4675834970530452) internal successors, (8825), 2545 states have internal predecessors, (8825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:49,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 8825 transitions. [2021-06-05 16:51:49,386 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 8825 transitions. Word has length 30 [2021-06-05 16:51:49,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:49,386 INFO L482 AbstractCegarLoop]: Abstraction has 2546 states and 8825 transitions. [2021-06-05 16:51:49,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:49,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 8825 transitions. [2021-06-05 16:51:49,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:49,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:49,390 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:49,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:49,600 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:49,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:49,600 INFO L82 PathProgramCache]: Analyzing trace with hash -52824090, now seen corresponding path program 28 times [2021-06-05 16:51:49,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:49,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767551632] [2021-06-05 16:51:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:49,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:49,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767551632] [2021-06-05 16:51:49,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767551632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:49,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108424309] [2021-06-05 16:51:49,632 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 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 16:51:49,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:51:49,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:49,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:49,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:49,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108424309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:49,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:49,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:51:49,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241783564] [2021-06-05 16:51:49,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:51:49,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:49,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:51:49,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:51:49,770 INFO L87 Difference]: Start difference. First operand 2546 states and 8825 transitions. Second operand has 16 states, 16 states have (on average 3.1875) 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 16:51:50,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:50,706 INFO L93 Difference]: Finished difference Result 7653 states and 24222 transitions. [2021-06-05 16:51:50,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:51:50,706 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) 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 30 [2021-06-05 16:51:50,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:50,717 INFO L225 Difference]: With dead ends: 7653 [2021-06-05 16:51:50,718 INFO L226 Difference]: Without dead ends: 7653 [2021-06-05 16:51:50,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 613.1ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:51:50,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7653 states. [2021-06-05 16:51:50,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7653 to 2551. [2021-06-05 16:51:50,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2551 states, 2550 states have (on average 3.4705882352941178) internal successors, (8850), 2550 states have internal predecessors, (8850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:50,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 8850 transitions. [2021-06-05 16:51:50,782 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 8850 transitions. Word has length 30 [2021-06-05 16:51:50,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:50,782 INFO L482 AbstractCegarLoop]: Abstraction has 2551 states and 8850 transitions. [2021-06-05 16:51:50,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) 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 16:51:50,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 8850 transitions. [2021-06-05 16:51:50,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:50,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:50,786 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:50,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 16:51:50,986 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:50,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:50,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1172821128, now seen corresponding path program 29 times [2021-06-05 16:51:50,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:50,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301693694] [2021-06-05 16:51:50,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:51,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:51,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301693694] [2021-06-05 16:51:51,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301693694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:51,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553124860] [2021-06-05 16:51:51,023 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 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 16:51:51,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:51:51,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:51,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:51,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:51,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553124860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:51,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:51,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:51:51,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571659909] [2021-06-05 16:51:51,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:51:51,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:51,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:51:51,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:51:51,167 INFO L87 Difference]: Start difference. First operand 2551 states and 8850 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 16:51:51,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:51,975 INFO L93 Difference]: Finished difference Result 6999 states and 21972 transitions. [2021-06-05 16:51:51,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:51:51,975 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 30 [2021-06-05 16:51:51,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:51,985 INFO L225 Difference]: With dead ends: 6999 [2021-06-05 16:51:51,985 INFO L226 Difference]: Without dead ends: 6979 [2021-06-05 16:51:51,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 492.4ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:51:51,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6979 states. [2021-06-05 16:51:52,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6979 to 2561. [2021-06-05 16:51:52,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 3.469140625) internal successors, (8881), 2560 states have internal predecessors, (8881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:52,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 8881 transitions. [2021-06-05 16:51:52,057 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 8881 transitions. Word has length 30 [2021-06-05 16:51:52,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:52,057 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 8881 transitions. [2021-06-05 16:51:52,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 16:51:52,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 8881 transitions. [2021-06-05 16:51:52,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:52,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:52,061 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:52,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 16:51:52,261 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:52,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:52,264 INFO L82 PathProgramCache]: Analyzing trace with hash -902311436, now seen corresponding path program 30 times [2021-06-05 16:51:52,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:52,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191644328] [2021-06-05 16:51:52,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:52,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:52,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191644328] [2021-06-05 16:51:52,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191644328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:52,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563836937] [2021-06-05 16:51:52,342 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 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 16:51:52,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:51:52,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:52,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:52,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:52,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563836937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:52,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:52,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:51:52,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959727740] [2021-06-05 16:51:52,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:51:52,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:52,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:51:52,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:51:52,512 INFO L87 Difference]: Start difference. First operand 2561 states and 8881 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 16:51:53,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:53,388 INFO L93 Difference]: Finished difference Result 7314 states and 22731 transitions. [2021-06-05 16:51:53,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:51:53,388 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 30 [2021-06-05 16:51:53,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:53,401 INFO L225 Difference]: With dead ends: 7314 [2021-06-05 16:51:53,401 INFO L226 Difference]: Without dead ends: 7314 [2021-06-05 16:51:53,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 561.9ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:51:53,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7314 states. [2021-06-05 16:51:53,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7314 to 2550. [2021-06-05 16:51:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.4699882306786973) internal successors, (8845), 2549 states have internal predecessors, (8845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:53,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8845 transitions. [2021-06-05 16:51:53,478 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8845 transitions. Word has length 30 [2021-06-05 16:51:53,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:53,478 INFO L482 AbstractCegarLoop]: Abstraction has 2550 states and 8845 transitions. [2021-06-05 16:51:53,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 16:51:53,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8845 transitions. [2021-06-05 16:51:53,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:53,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:53,483 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:53,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 16:51:53,700 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:53,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:53,700 INFO L82 PathProgramCache]: Analyzing trace with hash -317283250, now seen corresponding path program 31 times [2021-06-05 16:51:53,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:53,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709246473] [2021-06-05 16:51:53,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:53,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:53,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709246473] [2021-06-05 16:51:53,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709246473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:53,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515040690] [2021-06-05 16:51:53,731 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 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 16:51:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:53,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:53,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:53,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515040690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:53,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:53,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:51:53,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718052683] [2021-06-05 16:51:53,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:51:53,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:53,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:51:53,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:51:53,833 INFO L87 Difference]: Start difference. First operand 2550 states and 8845 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 16:51:54,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:54,431 INFO L93 Difference]: Finished difference Result 5631 states and 17797 transitions. [2021-06-05 16:51:54,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:51:54,431 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 30 [2021-06-05 16:51:54,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:54,439 INFO L225 Difference]: With dead ends: 5631 [2021-06-05 16:51:54,439 INFO L226 Difference]: Without dead ends: 5583 [2021-06-05 16:51:54,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 348.4ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:51:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5583 states. [2021-06-05 16:51:54,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5583 to 2564. [2021-06-05 16:51:54,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 3.467811158798283) internal successors, (8888), 2563 states have internal predecessors, (8888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 8888 transitions. [2021-06-05 16:51:54,490 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 8888 transitions. Word has length 30 [2021-06-05 16:51:54,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:54,490 INFO L482 AbstractCegarLoop]: Abstraction has 2564 states and 8888 transitions. [2021-06-05 16:51:54,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 16:51:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 8888 transitions. [2021-06-05 16:51:54,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:54,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:54,494 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:54,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:54,694 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:54,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:54,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1809287982, now seen corresponding path program 32 times [2021-06-05 16:51:54,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:54,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165909692] [2021-06-05 16:51:54,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:54,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:54,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165909692] [2021-06-05 16:51:54,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165909692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:54,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881634590] [2021-06-05 16:51:54,726 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 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 16:51:54,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:51:54,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:54,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:54,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:54,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881634590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:54,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:54,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:51:54,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324821905] [2021-06-05 16:51:54,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:51:54,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:54,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:51:54,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:51:54,829 INFO L87 Difference]: Start difference. First operand 2564 states and 8888 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 16:51:55,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:55,565 INFO L93 Difference]: Finished difference Result 6400 states and 19785 transitions. [2021-06-05 16:51:55,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:51:55,565 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 30 [2021-06-05 16:51:55,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:55,573 INFO L225 Difference]: With dead ends: 6400 [2021-06-05 16:51:55,573 INFO L226 Difference]: Without dead ends: 6384 [2021-06-05 16:51:55,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 462.5ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:51:55,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6384 states. [2021-06-05 16:51:55,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6384 to 2642. [2021-06-05 16:51:55,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2642 states, 2641 states have (on average 3.452101476713366) internal successors, (9117), 2641 states have internal predecessors, (9117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 9117 transitions. [2021-06-05 16:51:55,633 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 9117 transitions. Word has length 30 [2021-06-05 16:51:55,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:55,633 INFO L482 AbstractCegarLoop]: Abstraction has 2642 states and 9117 transitions. [2021-06-05 16:51:55,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 16:51:55,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 9117 transitions. [2021-06-05 16:51:55,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:55,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:55,638 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:55,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 16:51:55,838 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:55,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:55,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1538778290, now seen corresponding path program 33 times [2021-06-05 16:51:55,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:55,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180637422] [2021-06-05 16:51:55,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:55,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:55,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180637422] [2021-06-05 16:51:55,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180637422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:55,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263226224] [2021-06-05 16:51:55,870 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 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 16:51:55,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:51:55,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:55,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:55,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:55,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263226224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:55,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:55,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:51:55,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238579959] [2021-06-05 16:51:55,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:51:55,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:55,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:51:55,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:51:55,966 INFO L87 Difference]: Start difference. First operand 2642 states and 9117 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 16:51:56,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:56,944 INFO L93 Difference]: Finished difference Result 6651 states and 20412 transitions. [2021-06-05 16:51:56,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:51:56,945 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 30 [2021-06-05 16:51:56,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:56,954 INFO L225 Difference]: With dead ends: 6651 [2021-06-05 16:51:56,954 INFO L226 Difference]: Without dead ends: 6651 [2021-06-05 16:51:56,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 642.5ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:51:56,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6651 states. [2021-06-05 16:51:57,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6651 to 2550. [2021-06-05 16:51:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.4699882306786973) internal successors, (8845), 2549 states have internal predecessors, (8845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:57,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8845 transitions. [2021-06-05 16:51:57,012 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8845 transitions. Word has length 30 [2021-06-05 16:51:57,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:57,012 INFO L482 AbstractCegarLoop]: Abstraction has 2550 states and 8845 transitions. [2021-06-05 16:51:57,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 16:51:57,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8845 transitions. [2021-06-05 16:51:57,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:57,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:57,016 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:57,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:57,217 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:57,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:57,217 INFO L82 PathProgramCache]: Analyzing trace with hash 729705298, now seen corresponding path program 34 times [2021-06-05 16:51:57,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:57,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414453375] [2021-06-05 16:51:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:57,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:57,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414453375] [2021-06-05 16:51:57,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414453375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:57,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261342636] [2021-06-05 16:51:57,258 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 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 16:51:57,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:51:57,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:57,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:57,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:57,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261342636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:57,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:57,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:51:57,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843241438] [2021-06-05 16:51:57,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:51:57,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:57,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:51:57,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:51:57,365 INFO L87 Difference]: Start difference. First operand 2550 states and 8845 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) 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 16:51:58,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:58,121 INFO L93 Difference]: Finished difference Result 6000 states and 18681 transitions. [2021-06-05 16:51:58,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 16:51:58,121 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) 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 30 [2021-06-05 16:51:58,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:58,130 INFO L225 Difference]: With dead ends: 6000 [2021-06-05 16:51:58,130 INFO L226 Difference]: Without dead ends: 5912 [2021-06-05 16:51:58,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 488.0ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:51:58,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5912 states. [2021-06-05 16:51:58,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5912 to 2568. [2021-06-05 16:51:58,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 3.4678613167121153) internal successors, (8902), 2567 states have internal predecessors, (8902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:58,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 8902 transitions. [2021-06-05 16:51:58,183 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 8902 transitions. Word has length 30 [2021-06-05 16:51:58,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:58,183 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 8902 transitions. [2021-06-05 16:51:58,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) 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 16:51:58,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 8902 transitions. [2021-06-05 16:51:58,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:58,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:58,186 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:58,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:58,387 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:58,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:58,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1432234710, now seen corresponding path program 35 times [2021-06-05 16:51:58,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:58,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499426545] [2021-06-05 16:51:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:58,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:58,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499426545] [2021-06-05 16:51:58,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499426545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:58,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096587126] [2021-06-05 16:51:58,427 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 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 16:51:58,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:51:58,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:58,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:58,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:58,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096587126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:58,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:58,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:51:58,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146107117] [2021-06-05 16:51:58,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:51:58,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:58,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:51:58,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:51:58,524 INFO L87 Difference]: Start difference. First operand 2568 states and 8902 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) 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 16:51:59,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:59,323 INFO L93 Difference]: Finished difference Result 6028 states and 18895 transitions. [2021-06-05 16:51:59,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:51:59,324 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) 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 30 [2021-06-05 16:51:59,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:59,332 INFO L225 Difference]: With dead ends: 6028 [2021-06-05 16:51:59,332 INFO L226 Difference]: Without dead ends: 5980 [2021-06-05 16:51:59,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 547.9ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:51:59,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5980 states. [2021-06-05 16:51:59,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5980 to 2814. [2021-06-05 16:51:59,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2814 states, 2813 states have (on average 3.407394241023818) internal successors, (9585), 2813 states have internal predecessors, (9585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:59,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2814 states to 2814 states and 9585 transitions. [2021-06-05 16:51:59,387 INFO L78 Accepts]: Start accepts. Automaton has 2814 states and 9585 transitions. Word has length 30 [2021-06-05 16:51:59,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:59,387 INFO L482 AbstractCegarLoop]: Abstraction has 2814 states and 9585 transitions. [2021-06-05 16:51:59,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) 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 16:51:59,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2814 states and 9585 transitions. [2021-06-05 16:51:59,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:51:59,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:59,391 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:59,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 16:51:59,591 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:59,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:59,592 INFO L82 PathProgramCache]: Analyzing trace with hash -2092961066, now seen corresponding path program 36 times [2021-06-05 16:51:59,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:59,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714176878] [2021-06-05 16:51:59,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:59,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:59,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714176878] [2021-06-05 16:51:59,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714176878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:59,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297516645] [2021-06-05 16:51:59,633 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 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 16:51:59,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:51:59,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:59,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:59,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:59,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297516645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:59,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:59,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:51:59,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689351771] [2021-06-05 16:51:59,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:51:59,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:59,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:51:59,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:51:59,728 INFO L87 Difference]: Start difference. First operand 2814 states and 9585 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) 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 16:52:00,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:00,662 INFO L93 Difference]: Finished difference Result 6722 states and 20709 transitions. [2021-06-05 16:52:00,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 16:52:00,663 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) 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 30 [2021-06-05 16:52:00,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:00,672 INFO L225 Difference]: With dead ends: 6722 [2021-06-05 16:52:00,672 INFO L226 Difference]: Without dead ends: 6710 [2021-06-05 16:52:00,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 620.4ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 16:52:00,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6710 states. [2021-06-05 16:52:00,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6710 to 3090. [2021-06-05 16:52:00,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 3089 states have (on average 3.354807381029459) internal successors, (10363), 3089 states have internal predecessors, (10363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:00,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 10363 transitions. [2021-06-05 16:52:00,737 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 10363 transitions. Word has length 30 [2021-06-05 16:52:00,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:00,737 INFO L482 AbstractCegarLoop]: Abstraction has 3090 states and 10363 transitions. [2021-06-05 16:52:00,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) 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 16:52:00,737 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 10363 transitions. [2021-06-05 16:52:00,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:52:00,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:00,741 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:00,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:00,942 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:00,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:00,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1822451374, now seen corresponding path program 37 times [2021-06-05 16:52:00,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:00,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315734957] [2021-06-05 16:52:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:00,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:00,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315734957] [2021-06-05 16:52:00,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315734957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:00,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303673703] [2021-06-05 16:52:00,992 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 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 16:52:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:01,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:01,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:01,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303673703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:01,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:01,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:52:01,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689242692] [2021-06-05 16:52:01,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:52:01,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:01,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:52:01,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:52:01,127 INFO L87 Difference]: Start difference. First operand 3090 states and 10363 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) 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 16:52:02,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:02,284 INFO L93 Difference]: Finished difference Result 7117 states and 21720 transitions. [2021-06-05 16:52:02,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 16:52:02,284 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) 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 30 [2021-06-05 16:52:02,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:02,293 INFO L225 Difference]: With dead ends: 7117 [2021-06-05 16:52:02,293 INFO L226 Difference]: Without dead ends: 7117 [2021-06-05 16:52:02,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 786.1ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 16:52:02,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7117 states. [2021-06-05 16:52:02,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7117 to 2928. [2021-06-05 16:52:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2927 states have (on average 3.3850358729074137) internal successors, (9908), 2927 states have internal predecessors, (9908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:02,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 9908 transitions. [2021-06-05 16:52:02,354 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 9908 transitions. Word has length 30 [2021-06-05 16:52:02,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:02,354 INFO L482 AbstractCegarLoop]: Abstraction has 2928 states and 9908 transitions. [2021-06-05 16:52:02,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) 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 16:52:02,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 9908 transitions. [2021-06-05 16:52:02,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:52:02,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:02,357 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:02,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 16:52:02,558 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:02,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:02,558 INFO L82 PathProgramCache]: Analyzing trace with hash -605801532, now seen corresponding path program 38 times [2021-06-05 16:52:02,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:02,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763202951] [2021-06-05 16:52:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:02,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:02,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763202951] [2021-06-05 16:52:02,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763202951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:02,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438489153] [2021-06-05 16:52:02,604 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 16:52:02,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:52:02,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:02,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:52:02,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:02,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438489153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:02,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:02,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:52:02,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789782693] [2021-06-05 16:52:02,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:52:02,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:02,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:52:02,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:52:02,753 INFO L87 Difference]: Start difference. First operand 2928 states and 9908 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:03,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:03,715 INFO L93 Difference]: Finished difference Result 11499 states and 37094 transitions. [2021-06-05 16:52:03,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 16:52:03,716 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:52:03,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:03,733 INFO L225 Difference]: With dead ends: 11499 [2021-06-05 16:52:03,733 INFO L226 Difference]: Without dead ends: 11499 [2021-06-05 16:52:03,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 552.4ms TimeCoverageRelationStatistics Valid=922, Invalid=2984, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:52:03,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11499 states. [2021-06-05 16:52:03,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11499 to 3853. [2021-06-05 16:52:03,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3853 states, 3852 states have (on average 3.5983904465212877) internal successors, (13861), 3852 states have internal predecessors, (13861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:03,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3853 states to 3853 states and 13861 transitions. [2021-06-05 16:52:03,838 INFO L78 Accepts]: Start accepts. Automaton has 3853 states and 13861 transitions. Word has length 32 [2021-06-05 16:52:03,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:03,838 INFO L482 AbstractCegarLoop]: Abstraction has 3853 states and 13861 transitions. [2021-06-05 16:52:03,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:03,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3853 states and 13861 transitions. [2021-06-05 16:52:03,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:52:03,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:03,843 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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 16:52:04,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 16:52:04,043 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:04,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:04,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1297197704, now seen corresponding path program 17 times [2021-06-05 16:52:04,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:04,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209152171] [2021-06-05 16:52:04,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:04,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:04,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209152171] [2021-06-05 16:52:04,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209152171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:04,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573163946] [2021-06-05 16:52:04,101 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 16:52:04,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:52:04,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:04,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:52:04,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:04,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573163946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:04,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:04,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:52:04,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66732190] [2021-06-05 16:52:04,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:52:04,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:04,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:52:04,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:52:04,307 INFO L87 Difference]: Start difference. First operand 3853 states and 13861 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:05,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:05,365 INFO L93 Difference]: Finished difference Result 11274 states and 36638 transitions. [2021-06-05 16:52:05,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 16:52:05,365 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:52:05,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:05,383 INFO L225 Difference]: With dead ends: 11274 [2021-06-05 16:52:05,384 INFO L226 Difference]: Without dead ends: 11274 [2021-06-05 16:52:05,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 648.1ms TimeCoverageRelationStatistics Valid=918, Invalid=3114, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:52:05,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11274 states. [2021-06-05 16:52:05,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11274 to 3659. [2021-06-05 16:52:05,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3659 states, 3658 states have (on average 3.548933843630399) internal successors, (12982), 3658 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:05,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 12982 transitions. [2021-06-05 16:52:05,507 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 12982 transitions. Word has length 32 [2021-06-05 16:52:05,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:05,507 INFO L482 AbstractCegarLoop]: Abstraction has 3659 states and 12982 transitions. [2021-06-05 16:52:05,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:05,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 12982 transitions. [2021-06-05 16:52:05,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:52:05,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:05,512 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:05,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:05,713 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:05,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:05,713 INFO L82 PathProgramCache]: Analyzing trace with hash 600098510, now seen corresponding path program 39 times [2021-06-05 16:52:05,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:05,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076902713] [2021-06-05 16:52:05,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:05,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:05,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076902713] [2021-06-05 16:52:05,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076902713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:05,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318967796] [2021-06-05 16:52:05,746 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 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 16:52:05,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:52:05,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:05,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:52:05,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:05,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318967796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:05,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:05,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:52:05,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796290030] [2021-06-05 16:52:05,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:52:05,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:05,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:52:05,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:52:05,870 INFO L87 Difference]: Start difference. First operand 3659 states and 12982 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 16:52:06,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:06,408 INFO L93 Difference]: Finished difference Result 9494 states and 30497 transitions. [2021-06-05 16:52:06,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:52:06,408 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 32 [2021-06-05 16:52:06,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:06,422 INFO L225 Difference]: With dead ends: 9494 [2021-06-05 16:52:06,422 INFO L226 Difference]: Without dead ends: 9486 [2021-06-05 16:52:06,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 292.8ms TimeCoverageRelationStatistics Valid=396, Invalid=1244, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:52:06,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9486 states. [2021-06-05 16:52:06,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9486 to 3671. [2021-06-05 16:52:06,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3670 states have (on average 3.5498637602179834) internal successors, (13028), 3670 states have internal predecessors, (13028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:06,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 13028 transitions. [2021-06-05 16:52:06,529 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 13028 transitions. Word has length 32 [2021-06-05 16:52:06,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:06,529 INFO L482 AbstractCegarLoop]: Abstraction has 3671 states and 13028 transitions. [2021-06-05 16:52:06,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 16:52:06,529 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 13028 transitions. [2021-06-05 16:52:06,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:52:06,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:06,534 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:06,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 16:52:06,735 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:06,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:06,735 INFO L82 PathProgramCache]: Analyzing trace with hash 870608202, now seen corresponding path program 40 times [2021-06-05 16:52:06,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:06,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960224788] [2021-06-05 16:52:06,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:06,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:06,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:06,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960224788] [2021-06-05 16:52:06,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960224788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:06,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325489098] [2021-06-05 16:52:06,805 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 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 16:52:06,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:52:06,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:06,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:52:06,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:06,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325489098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:06,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:06,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:52:06,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739876739] [2021-06-05 16:52:06,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:52:06,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:06,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:52:06,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:52:06,936 INFO L87 Difference]: Start difference. First operand 3671 states and 13028 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 16:52:07,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:07,629 INFO L93 Difference]: Finished difference Result 10005 states and 31855 transitions. [2021-06-05 16:52:07,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:52:07,630 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 32 [2021-06-05 16:52:07,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:07,644 INFO L225 Difference]: With dead ends: 10005 [2021-06-05 16:52:07,645 INFO L226 Difference]: Without dead ends: 10005 [2021-06-05 16:52:07,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 400.9ms TimeCoverageRelationStatistics Valid=480, Invalid=1412, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:52:07,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10005 states. [2021-06-05 16:52:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10005 to 3659. [2021-06-05 16:52:07,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3659 states, 3658 states have (on average 3.548933843630399) internal successors, (12982), 3658 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:07,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 12982 transitions. [2021-06-05 16:52:07,752 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 12982 transitions. Word has length 32 [2021-06-05 16:52:07,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:07,753 INFO L482 AbstractCegarLoop]: Abstraction has 3659 states and 12982 transitions. [2021-06-05 16:52:07,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 16:52:07,753 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 12982 transitions. [2021-06-05 16:52:07,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:52:07,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:07,757 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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 16:52:07,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:07,958 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:07,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:07,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2007937660, now seen corresponding path program 18 times [2021-06-05 16:52:07,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:07,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70547352] [2021-06-05 16:52:07,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:07,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:07,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70547352] [2021-06-05 16:52:07,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70547352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:07,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289341803] [2021-06-05 16:52:07,993 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 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 16:52:08,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:52:08,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:08,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:08,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:52:08,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289341803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:08,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:08,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 16:52:08,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054752834] [2021-06-05 16:52:08,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:52:08,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:08,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:52:08,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:52:08,137 INFO L87 Difference]: Start difference. First operand 3659 states and 12982 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:09,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:09,728 INFO L93 Difference]: Finished difference Result 10824 states and 34873 transitions. [2021-06-05 16:52:09,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 16:52:09,728 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:52:09,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:09,745 INFO L225 Difference]: With dead ends: 10824 [2021-06-05 16:52:09,746 INFO L226 Difference]: Without dead ends: 10824 [2021-06-05 16:52:09,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3112 ImplicationChecksByTransitivity, 1011.3ms TimeCoverageRelationStatistics Valid=1649, Invalid=7281, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 16:52:09,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10824 states. [2021-06-05 16:52:09,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10824 to 4026. [2021-06-05 16:52:09,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 4025 states have (on average 3.570683229813665) internal successors, (14372), 4025 states have internal predecessors, (14372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:09,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 14372 transitions. [2021-06-05 16:52:09,855 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 14372 transitions. Word has length 32 [2021-06-05 16:52:09,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:09,856 INFO L482 AbstractCegarLoop]: Abstraction has 4026 states and 14372 transitions. [2021-06-05 16:52:09,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:09,856 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 14372 transitions. [2021-06-05 16:52:09,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:52:09,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:09,861 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:10,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 16:52:10,061 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:10,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:10,062 INFO L82 PathProgramCache]: Analyzing trace with hash -383319252, now seen corresponding path program 41 times [2021-06-05 16:52:10,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:10,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223559007] [2021-06-05 16:52:10,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:10,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:10,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:10,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223559007] [2021-06-05 16:52:10,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223559007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:10,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170337189] [2021-06-05 16:52:10,100 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 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 16:52:10,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:52:10,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:10,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:10,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:52:10,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170337189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:10,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:10,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 16:52:10,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739654415] [2021-06-05 16:52:10,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:52:10,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:10,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:52:10,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:52:10,251 INFO L87 Difference]: Start difference. First operand 4026 states and 14372 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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 16:52:12,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:12,124 INFO L93 Difference]: Finished difference Result 11450 states and 37158 transitions. [2021-06-05 16:52:12,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 16:52:12,124 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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 16:52:12,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:12,141 INFO L225 Difference]: With dead ends: 11450 [2021-06-05 16:52:12,141 INFO L226 Difference]: Without dead ends: 11402 [2021-06-05 16:52:12,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4651 ImplicationChecksByTransitivity, 1261.3ms TimeCoverageRelationStatistics Valid=2133, Invalid=10299, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 16:52:12,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11402 states. [2021-06-05 16:52:12,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11402 to 4295. [2021-06-05 16:52:12,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4295 states, 4294 states have (on average 3.6313460642757334) internal successors, (15593), 4294 states have internal predecessors, (15593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4295 states to 4295 states and 15593 transitions. [2021-06-05 16:52:12,257 INFO L78 Accepts]: Start accepts. Automaton has 4295 states and 15593 transitions. Word has length 32 [2021-06-05 16:52:12,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:12,257 INFO L482 AbstractCegarLoop]: Abstraction has 4295 states and 15593 transitions. [2021-06-05 16:52:12,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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 16:52:12,257 INFO L276 IsEmpty]: Start isEmpty. Operand 4295 states and 15593 transitions. [2021-06-05 16:52:12,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:52:12,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:12,263 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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 16:52:12,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:12,463 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:12,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:12,464 INFO L82 PathProgramCache]: Analyzing trace with hash 717122884, now seen corresponding path program 19 times [2021-06-05 16:52:12,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:12,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705335198] [2021-06-05 16:52:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:52:12,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:12,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705335198] [2021-06-05 16:52:12,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705335198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:12,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893263662] [2021-06-05 16:52:12,504 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 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 16:52:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:12,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:52:12,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:12,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893263662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:12,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:12,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 16:52:12,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708216816] [2021-06-05 16:52:12,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:52:12,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:12,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:52:12,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:52:12,642 INFO L87 Difference]: Start difference. First operand 4295 states and 15593 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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 16:52:13,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:13,413 INFO L93 Difference]: Finished difference Result 11886 states and 38735 transitions. [2021-06-05 16:52:13,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:52:13,414 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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 16:52:13,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:13,483 INFO L225 Difference]: With dead ends: 11886 [2021-06-05 16:52:13,483 INFO L226 Difference]: Without dead ends: 11886 [2021-06-05 16:52:13,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 483.2ms TimeCoverageRelationStatistics Valid=740, Invalid=2016, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:52:13,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11886 states. [2021-06-05 16:52:13,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11886 to 4493. [2021-06-05 16:52:13,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4493 states, 4492 states have (on average 3.610418521816563) internal successors, (16218), 4492 states have internal predecessors, (16218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4493 states to 4493 states and 16218 transitions. [2021-06-05 16:52:13,608 INFO L78 Accepts]: Start accepts. Automaton has 4493 states and 16218 transitions. Word has length 32 [2021-06-05 16:52:13,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:13,608 INFO L482 AbstractCegarLoop]: Abstraction has 4493 states and 16218 transitions. [2021-06-05 16:52:13,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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 16:52:13,608 INFO L276 IsEmpty]: Start isEmpty. Operand 4493 states and 16218 transitions. [2021-06-05 16:52:13,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:52:13,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:13,614 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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 16:52:13,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 16:52:13,815 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:13,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:13,815 INFO L82 PathProgramCache]: Analyzing trace with hash -338254510, now seen corresponding path program 20 times [2021-06-05 16:52:13,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:13,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542927392] [2021-06-05 16:52:13,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:52:13,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:13,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542927392] [2021-06-05 16:52:13,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542927392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:13,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825325904] [2021-06-05 16:52:13,857 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 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 16:52:13,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:52:13,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:13,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:13,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:52:13,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825325904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:13,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:13,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 16:52:13,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496028873] [2021-06-05 16:52:13,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:52:13,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:13,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:52:13,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:52:13,987 INFO L87 Difference]: Start difference. First operand 4493 states and 16218 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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 16:52:15,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:15,450 INFO L93 Difference]: Finished difference Result 12030 states and 39107 transitions. [2021-06-05 16:52:15,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 16:52:15,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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 16:52:15,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:15,468 INFO L225 Difference]: With dead ends: 12030 [2021-06-05 16:52:15,469 INFO L226 Difference]: Without dead ends: 12026 [2021-06-05 16:52:15,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3145 ImplicationChecksByTransitivity, 902.9ms TimeCoverageRelationStatistics Valid=1618, Invalid=7124, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 16:52:15,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12026 states. [2021-06-05 16:52:15,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12026 to 4522. [2021-06-05 16:52:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4522 states, 4521 states have (on average 3.6051758460517584) internal successors, (16299), 4521 states have internal predecessors, (16299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:15,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 16299 transitions. [2021-06-05 16:52:15,590 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 16299 transitions. Word has length 32 [2021-06-05 16:52:15,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:15,590 INFO L482 AbstractCegarLoop]: Abstraction has 4522 states and 16299 transitions. [2021-06-05 16:52:15,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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 16:52:15,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 16299 transitions. [2021-06-05 16:52:15,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:52:15,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:15,596 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 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 16:52:15,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:15,806 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:15,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:15,807 INFO L82 PathProgramCache]: Analyzing trace with hash 956690446, now seen corresponding path program 21 times [2021-06-05 16:52:15,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:15,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360141112] [2021-06-05 16:52:15,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:15,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:15,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360141112] [2021-06-05 16:52:15,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360141112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:15,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333687061] [2021-06-05 16:52:15,843 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 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 16:52:15,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 16:52:15,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:15,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:52:15,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:15,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333687061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:15,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:15,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 16:52:15,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981472637] [2021-06-05 16:52:15,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:52:15,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:15,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:52:15,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:52:15,970 INFO L87 Difference]: Start difference. First operand 4522 states and 16299 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 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 16:52:17,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:17,070 INFO L93 Difference]: Finished difference Result 11020 states and 36349 transitions. [2021-06-05 16:52:17,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 16:52:17,071 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 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 32 [2021-06-05 16:52:17,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:17,087 INFO L225 Difference]: With dead ends: 11020 [2021-06-05 16:52:17,087 INFO L226 Difference]: Without dead ends: 10988 [2021-06-05 16:52:17,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 666.3ms TimeCoverageRelationStatistics Valid=1165, Invalid=4237, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 16:52:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10988 states. [2021-06-05 16:52:17,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10988 to 4521. [2021-06-05 16:52:17,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4521 states, 4520 states have (on average 3.604424778761062) internal successors, (16292), 4520 states have internal predecessors, (16292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:17,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4521 states to 4521 states and 16292 transitions. [2021-06-05 16:52:17,209 INFO L78 Accepts]: Start accepts. Automaton has 4521 states and 16292 transitions. Word has length 32 [2021-06-05 16:52:17,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:17,209 INFO L482 AbstractCegarLoop]: Abstraction has 4521 states and 16292 transitions. [2021-06-05 16:52:17,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 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 16:52:17,210 INFO L276 IsEmpty]: Start isEmpty. Operand 4521 states and 16292 transitions. [2021-06-05 16:52:17,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:52:17,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:17,216 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:17,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 16:52:17,416 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:17,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:17,417 INFO L82 PathProgramCache]: Analyzing trace with hash 313112068, now seen corresponding path program 42 times [2021-06-05 16:52:17,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:17,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576178973] [2021-06-05 16:52:17,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:17,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:17,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576178973] [2021-06-05 16:52:17,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576178973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:17,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095218792] [2021-06-05 16:52:17,879 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 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 16:52:17,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:52:17,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:17,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:52:17,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:18,008 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 8 treesize of output 7 [2021-06-05 16:52:18,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:18,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:18,019 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 16:52:18,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-06-05 16:52:18,062 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 16:52:18,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:52:18,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:18,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:18,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:52:18,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-06-05 16:52:18,139 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-05 16:52:18,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 16:52:18,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:18,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:18,158 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 16:52:18,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:54 [2021-06-05 16:52:18,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,289 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-06-05 16:52:18,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 16:52:18,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:18,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:18,313 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 16:52:18,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:57 [2021-06-05 16:52:18,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,477 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-06-05 16:52:18,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 16:52:18,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:18,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:18,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:52:18,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:64, output treesize:63 [2021-06-05 16:52:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:52:18,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095218792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:18,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:18,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-05 16:52:18,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620926016] [2021-06-05 16:52:18,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:52:18,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:18,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:52:18,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:52:18,641 INFO L87 Difference]: Start difference. First operand 4521 states and 16292 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:19,174 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-05 16:52:21,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:21,393 INFO L93 Difference]: Finished difference Result 6435 states and 22058 transitions. [2021-06-05 16:52:21,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:52:21,394 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:52:21,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:21,403 INFO L225 Difference]: With dead ends: 6435 [2021-06-05 16:52:21,403 INFO L226 Difference]: Without dead ends: 6256 [2021-06-05 16:52:21,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 2452.0ms TimeCoverageRelationStatistics Valid=509, Invalid=3397, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:52:21,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2021-06-05 16:52:21,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 4629. [2021-06-05 16:52:21,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4628 states have (on average 3.6028522039757993) internal successors, (16674), 4628 states have internal predecessors, (16674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:21,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 16674 transitions. [2021-06-05 16:52:21,471 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 16674 transitions. Word has length 32 [2021-06-05 16:52:21,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:21,471 INFO L482 AbstractCegarLoop]: Abstraction has 4629 states and 16674 transitions. [2021-06-05 16:52:21,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:21,471 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 16674 transitions. [2021-06-05 16:52:21,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:52:21,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:21,477 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:21,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:21,685 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:21,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:21,685 INFO L82 PathProgramCache]: Analyzing trace with hash 2029292164, now seen corresponding path program 43 times [2021-06-05 16:52:21,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:21,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159755787] [2021-06-05 16:52:21,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:22,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:22,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159755787] [2021-06-05 16:52:22,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159755787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:22,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474096455] [2021-06-05 16:52:22,103 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 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 16:52:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:22,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:52:22,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:22,222 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 8 treesize of output 7 [2021-06-05 16:52:22,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:22,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:22,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:52:22,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-05 16:52:22,257 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 16 treesize of output 18 [2021-06-05 16:52:22,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:22,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:22,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:52:22,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-06-05 16:52:22,313 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-05 16:52:22,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 16:52:22,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:22,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:22,327 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 16:52:22,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-06-05 16:52:22,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:22,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:22,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:52:22,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 30 treesize of output 33 [2021-06-05 16:52:22,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:22,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:22,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:52:22,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:42 [2021-06-05 16:52:22,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:22,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:22,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 30 treesize of output 33 [2021-06-05 16:52:22,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:22,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:22,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:52:22,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:39 [2021-06-05 16:52:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:22,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474096455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:22,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:22,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-06-05 16:52:22,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261626264] [2021-06-05 16:52:22,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:52:22,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:22,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:52:22,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:52:22,618 INFO L87 Difference]: Start difference. First operand 4629 states and 16674 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:24,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:24,033 INFO L93 Difference]: Finished difference Result 6469 states and 22175 transitions. [2021-06-05 16:52:24,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:52:24,033 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:52:24,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:24,042 INFO L225 Difference]: With dead ends: 6469 [2021-06-05 16:52:24,042 INFO L226 Difference]: Without dead ends: 6146 [2021-06-05 16:52:24,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1573.1ms TimeCoverageRelationStatistics Valid=413, Invalid=1939, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:52:24,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6146 states. [2021-06-05 16:52:24,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6146 to 4719. [2021-06-05 16:52:24,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4719 states, 4718 states have (on average 3.5938957185247986) internal successors, (16956), 4718 states have internal predecessors, (16956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:24,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4719 states to 4719 states and 16956 transitions. [2021-06-05 16:52:24,109 INFO L78 Accepts]: Start accepts. Automaton has 4719 states and 16956 transitions. Word has length 32 [2021-06-05 16:52:24,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:24,109 INFO L482 AbstractCegarLoop]: Abstraction has 4719 states and 16956 transitions. [2021-06-05 16:52:24,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:24,109 INFO L276 IsEmpty]: Start isEmpty. Operand 4719 states and 16956 transitions. [2021-06-05 16:52:24,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:52:24,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:24,115 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:24,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 16:52:24,315 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:24,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:24,316 INFO L82 PathProgramCache]: Analyzing trace with hash -500654400, now seen corresponding path program 44 times [2021-06-05 16:52:24,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:24,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509873474] [2021-06-05 16:52:24,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:24,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:24,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509873474] [2021-06-05 16:52:24,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509873474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:24,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205812161] [2021-06-05 16:52:24,670 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 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 16:52:24,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:52:24,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:24,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:52:24,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:24,790 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 16:52:24,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:24,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:24,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:52:24,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 16:52:24,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:24,828 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 20 treesize of output 22 [2021-06-05 16:52:24,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:24,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:24,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:52:24,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-05 16:52:24,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:24,886 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-06-05 16:52:24,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-06-05 16:52:24,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:24,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:24,901 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 16:52:24,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:53 [2021-06-05 16:52:24,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:24,993 INFO L354 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-06-05 16:52:24,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2021-06-05 16:52:24,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:25,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:25,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:52:25,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:53 [2021-06-05 16:52:25,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:25,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:25,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:25,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:25,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:52:25,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 34 treesize of output 37 [2021-06-05 16:52:25,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:25,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:25,174 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 16:52:25,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:48 [2021-06-05 16:52:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:25,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205812161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:25,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:25,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 16:52:25,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327056805] [2021-06-05 16:52:25,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:52:25,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:25,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:52:25,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:52:25,253 INFO L87 Difference]: Start difference. First operand 4719 states and 16956 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:25,615 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 16:52:26,727 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2021-06-05 16:52:27,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:27,902 INFO L93 Difference]: Finished difference Result 7571 states and 25578 transitions. [2021-06-05 16:52:27,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:52:27,902 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:52:27,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:27,912 INFO L225 Difference]: With dead ends: 7571 [2021-06-05 16:52:27,912 INFO L226 Difference]: Without dead ends: 7144 [2021-06-05 16:52:27,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 2415.3ms TimeCoverageRelationStatistics Valid=604, Invalid=2936, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:52:27,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7144 states. [2021-06-05 16:52:27,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7144 to 4997. [2021-06-05 16:52:27,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4997 states, 4996 states have (on average 3.5712570056044837) internal successors, (17842), 4996 states have internal predecessors, (17842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:27,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4997 states to 4997 states and 17842 transitions. [2021-06-05 16:52:27,987 INFO L78 Accepts]: Start accepts. Automaton has 4997 states and 17842 transitions. Word has length 32 [2021-06-05 16:52:27,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:27,987 INFO L482 AbstractCegarLoop]: Abstraction has 4997 states and 17842 transitions. [2021-06-05 16:52:27,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:27,987 INFO L276 IsEmpty]: Start isEmpty. Operand 4997 states and 17842 transitions. [2021-06-05 16:52:27,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:52:27,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:27,993 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:28,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 16:52:28,194 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:28,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:28,194 INFO L82 PathProgramCache]: Analyzing trace with hash 457173692, now seen corresponding path program 45 times [2021-06-05 16:52:28,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:28,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718983251] [2021-06-05 16:52:28,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:28,682 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:28,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:28,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718983251] [2021-06-05 16:52:28,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718983251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:28,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543669827] [2021-06-05 16:52:28,682 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 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 16:52:28,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:52:28,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:28,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:52:28,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:28,843 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 8 treesize of output 7 [2021-06-05 16:52:28,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:28,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:28,855 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 16:52:28,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:33 [2021-06-05 16:52:28,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:28,899 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 16 treesize of output 18 [2021-06-05 16:52:28,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:28,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:28,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:52:28,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:40 [2021-06-05 16:52:28,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:28,980 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-05 16:52:28,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 16:52:28,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:28,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:28,999 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 16:52:28,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:53, output treesize:52 [2021-06-05 16:52:29,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:29,126 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-06-05 16:52:29,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 16:52:29,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:29,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:29,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:52:29,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:68, output treesize:67 [2021-06-05 16:52:29,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:29,355 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-06-05 16:52:29,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 37 treesize of output 48 [2021-06-05 16:52:29,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:29,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:29,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2021-06-05 16:52:29,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:75 [2021-06-05 16:52:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:29,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543669827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:29,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:29,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 16:52:29,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220596062] [2021-06-05 16:52:29,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:52:29,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:29,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:52:29,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:52:29,814 INFO L87 Difference]: Start difference. First operand 4997 states and 17842 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:30,587 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-05 16:52:30,734 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-06-05 16:52:31,147 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-06-05 16:52:32,224 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2021-06-05 16:52:32,928 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2021-06-05 16:52:33,668 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2021-06-05 16:52:33,920 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2021-06-05 16:52:34,232 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2021-06-05 16:52:35,229 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2021-06-05 16:52:35,654 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2021-06-05 16:52:35,825 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2021-06-05 16:52:39,739 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2021-06-05 16:52:41,294 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 87 [2021-06-05 16:52:42,641 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 85 [2021-06-05 16:52:44,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:44,844 INFO L93 Difference]: Finished difference Result 7587 states and 26264 transitions. [2021-06-05 16:52:44,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 16:52:44,845 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:52:44,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:44,856 INFO L225 Difference]: With dead ends: 7587 [2021-06-05 16:52:44,856 INFO L226 Difference]: Without dead ends: 7468 [2021-06-05 16:52:44,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 5711.3ms TimeCoverageRelationStatistics Valid=935, Invalid=5227, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 16:52:44,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7468 states. [2021-06-05 16:52:44,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7468 to 5655. [2021-06-05 16:52:44,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5655 states, 5654 states have (on average 3.5951538733639903) internal successors, (20327), 5654 states have internal predecessors, (20327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:44,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5655 states to 5655 states and 20327 transitions. [2021-06-05 16:52:44,941 INFO L78 Accepts]: Start accepts. Automaton has 5655 states and 20327 transitions. Word has length 32 [2021-06-05 16:52:44,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:44,941 INFO L482 AbstractCegarLoop]: Abstraction has 5655 states and 20327 transitions. [2021-06-05 16:52:44,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:44,942 INFO L276 IsEmpty]: Start isEmpty. Operand 5655 states and 20327 transitions. [2021-06-05 16:52:44,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:52:44,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:44,949 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:45,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 16:52:45,149 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:45,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:45,149 INFO L82 PathProgramCache]: Analyzing trace with hash 737661248, now seen corresponding path program 46 times [2021-06-05 16:52:45,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:45,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242961339] [2021-06-05 16:52:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:45,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:45,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242961339] [2021-06-05 16:52:45,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242961339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:45,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88108309] [2021-06-05 16:52:45,489 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 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 16:52:45,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:52:45,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:45,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:52:45,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:45,626 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 12 treesize of output 11 [2021-06-05 16:52:45,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:45,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:45,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:52:45,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 16:52:45,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:45,669 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 20 treesize of output 22 [2021-06-05 16:52:45,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:45,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:45,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:52:45,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 16:52:45,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:45,726 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-06-05 16:52:45,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-06-05 16:52:45,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:45,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:45,740 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 16:52:45,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:48 [2021-06-05 16:52:45,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:45,821 INFO L354 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-06-05 16:52:45,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2021-06-05 16:52:45,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:45,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:45,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:52:45,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:48 [2021-06-05 16:52:45,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:45,914 INFO L354 Elim1Store]: treesize reduction 72, result has 20.0 percent of original size [2021-06-05 16:52:45,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 42 [2021-06-05 16:52:45,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:45,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:45,933 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 16:52:45,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:61, output treesize:60 [2021-06-05 16:52:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:46,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88108309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:46,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:46,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 16:52:46,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586275656] [2021-06-05 16:52:46,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:52:46,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:46,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:52:46,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:52:46,163 INFO L87 Difference]: Start difference. First operand 5655 states and 20327 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:50,965 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 81 [2021-06-05 16:52:51,134 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2021-06-05 16:52:51,657 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2021-06-05 16:52:51,849 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2021-06-05 16:52:52,061 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2021-06-05 16:52:52,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:52,141 INFO L93 Difference]: Finished difference Result 9721 states and 32858 transitions. [2021-06-05 16:52:52,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 16:52:52,141 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:52:52,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:52,156 INFO L225 Difference]: With dead ends: 9721 [2021-06-05 16:52:52,156 INFO L226 Difference]: Without dead ends: 9341 [2021-06-05 16:52:52,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2164 ImplicationChecksByTransitivity, 4839.7ms TimeCoverageRelationStatistics Valid=1229, Invalid=6253, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 16:52:52,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2021-06-05 16:52:52,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 5540. [2021-06-05 16:52:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5540 states, 5539 states have (on average 3.6270084852861526) internal successors, (20090), 5539 states have internal predecessors, (20090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:52,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5540 states to 5540 states and 20090 transitions. [2021-06-05 16:52:52,250 INFO L78 Accepts]: Start accepts. Automaton has 5540 states and 20090 transitions. Word has length 32 [2021-06-05 16:52:52,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:52,250 INFO L482 AbstractCegarLoop]: Abstraction has 5540 states and 20090 transitions. [2021-06-05 16:52:52,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:52,250 INFO L276 IsEmpty]: Start isEmpty. Operand 5540 states and 20090 transitions. [2021-06-05 16:52:52,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:52:52,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:52,257 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:52,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:52,457 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:52,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:52,458 INFO L82 PathProgramCache]: Analyzing trace with hash -2125295156, now seen corresponding path program 47 times [2021-06-05 16:52:52,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:52,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711024876] [2021-06-05 16:52:52,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:52,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:52,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711024876] [2021-06-05 16:52:52,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711024876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:52,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434726728] [2021-06-05 16:52:52,836 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 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 16:52:52,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:52:52,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:52,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:52:52,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:52,967 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 8 treesize of output 7 [2021-06-05 16:52:52,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:52,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:52,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:52:52,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-05 16:52:53,033 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 16 treesize of output 18 [2021-06-05 16:52:53,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:53,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:53,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:52:53,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 16:52:53,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 23 treesize of output 23 [2021-06-05 16:52:53,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:53,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:53,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:52:53,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:27 [2021-06-05 16:52:53,115 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-05 16:52:53,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 16:52:53,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:53,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:53,128 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 16:52:53,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:39 [2021-06-05 16:52:53,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:53,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:53,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:52:53,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 30 treesize of output 33 [2021-06-05 16:52:53,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:53,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:53,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:52:53,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:41 [2021-06-05 16:52:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:53,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434726728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:53,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:53,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 16:52:53,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960469258] [2021-06-05 16:52:53,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:52:53,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:53,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:52:53,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:52:53,354 INFO L87 Difference]: Start difference. First operand 5540 states and 20090 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:55,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:55,067 INFO L93 Difference]: Finished difference Result 8803 states and 30962 transitions. [2021-06-05 16:52:55,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:52:55,067 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:52:55,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:55,080 INFO L225 Difference]: With dead ends: 8803 [2021-06-05 16:52:55,080 INFO L226 Difference]: Without dead ends: 8465 [2021-06-05 16:52:55,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1582.2ms TimeCoverageRelationStatistics Valid=462, Invalid=2844, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:52:55,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8465 states. [2021-06-05 16:52:55,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8465 to 6862. [2021-06-05 16:52:55,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6862 states, 6861 states have (on average 3.6003498032356798) internal successors, (24702), 6861 states have internal predecessors, (24702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:55,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6862 states to 6862 states and 24702 transitions. [2021-06-05 16:52:55,186 INFO L78 Accepts]: Start accepts. Automaton has 6862 states and 24702 transitions. Word has length 32 [2021-06-05 16:52:55,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:55,187 INFO L482 AbstractCegarLoop]: Abstraction has 6862 states and 24702 transitions. [2021-06-05 16:52:55,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:55,187 INFO L276 IsEmpty]: Start isEmpty. Operand 6862 states and 24702 transitions. [2021-06-05 16:52:55,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:52:55,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:55,196 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:55,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 16:52:55,397 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:55,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:55,397 INFO L82 PathProgramCache]: Analyzing trace with hash -787029172, now seen corresponding path program 48 times [2021-06-05 16:52:55,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:55,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415820667] [2021-06-05 16:52:55,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:55,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:55,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415820667] [2021-06-05 16:52:55,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415820667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:55,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536596090] [2021-06-05 16:52:55,808 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 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 16:52:55,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:52:55,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:55,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:52:55,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:55,939 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 8 treesize of output 7 [2021-06-05 16:52:55,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:55,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:55,950 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 16:52:55,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-06-05 16:52:55,995 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 16:52:55,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:52:55,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:56,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:56,007 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 16:52:56,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:39 [2021-06-05 16:52:56,096 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-05 16:52:56,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 16:52:56,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:56,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:56,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:52:56,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:51 [2021-06-05 16:52:56,194 INFO L354 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2021-06-05 16:52:56,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 16:52:56,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:56,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:56,215 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 16:52:56,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:63 [2021-06-05 16:52:56,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:56,336 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-06-05 16:52:56,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 16:52:56,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:56,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:56,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:52:56,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:46 [2021-06-05 16:52:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:52:56,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536596090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:56,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:56,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-05 16:52:56,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952788431] [2021-06-05 16:52:56,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:52:56,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:56,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:52:56,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:52:56,506 INFO L87 Difference]: Start difference. First operand 6862 states and 24702 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:00,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:00,633 INFO L93 Difference]: Finished difference Result 10382 states and 35158 transitions. [2021-06-05 16:53:00,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:53:00,633 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:53:00,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:00,649 INFO L225 Difference]: With dead ends: 10382 [2021-06-05 16:53:00,649 INFO L226 Difference]: Without dead ends: 10079 [2021-06-05 16:53:00,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 3526.7ms TimeCoverageRelationStatistics Valid=964, Invalid=6518, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 16:53:00,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10079 states. [2021-06-05 16:53:00,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10079 to 7386. [2021-06-05 16:53:00,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7386 states, 7385 states have (on average 3.6106973595125256) internal successors, (26665), 7385 states have internal predecessors, (26665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:00,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7386 states to 7386 states and 26665 transitions. [2021-06-05 16:53:00,770 INFO L78 Accepts]: Start accepts. Automaton has 7386 states and 26665 transitions. Word has length 32 [2021-06-05 16:53:00,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:00,770 INFO L482 AbstractCegarLoop]: Abstraction has 7386 states and 26665 transitions. [2021-06-05 16:53:00,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:00,770 INFO L276 IsEmpty]: Start isEmpty. Operand 7386 states and 26665 transitions. [2021-06-05 16:53:00,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:53:00,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:00,780 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:00,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:00,981 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:00,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:00,981 INFO L82 PathProgramCache]: Analyzing trace with hash -700345780, now seen corresponding path program 49 times [2021-06-05 16:53:00,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:00,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91636808] [2021-06-05 16:53:00,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:01,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:01,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91636808] [2021-06-05 16:53:01,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91636808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:01,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869278292] [2021-06-05 16:53:01,360 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 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 16:53:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:01,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:53:01,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:01,472 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 8 treesize of output 7 [2021-06-05 16:53:01,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:01,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:01,481 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 16:53:01,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-05 16:53:01,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:53:01,524 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 16 treesize of output 18 [2021-06-05 16:53:01,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:01,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:01,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:53:01,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-06-05 16:53:01,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:53:01,591 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-05 16:53:01,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 16:53:01,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:01,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:01,609 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 16:53:01,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:49 [2021-06-05 16:53:01,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:53:01,687 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-06-05 16:53:01,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 16:53:01,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:01,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:01,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:53:01,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:61 [2021-06-05 16:53:01,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:53:01,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:53:01,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:53:01,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:53:01,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:53:01,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:53:01,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:53:01,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 38 [2021-06-05 16:53:01,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:01,957 INFO L628 ElimStorePlain]: treesize reduction 7, result has 88.9 percent of original size [2021-06-05 16:53:01,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:53:01,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:71, output treesize:51 [2021-06-05 16:53:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:02,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869278292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:02,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:02,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-06-05 16:53:02,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140960147] [2021-06-05 16:53:02,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:53:02,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:02,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:53:02,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:53:02,132 INFO L87 Difference]: Start difference. First operand 7386 states and 26665 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:06,841 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-06-05 16:53:09,240 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-06-05 16:53:13,778 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 16:53:17,052 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-06-05 16:53:18,237 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-05 16:53:20,512 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 16:53:21,793 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-06-05 16:53:23,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:23,248 INFO L93 Difference]: Finished difference Result 13949 states and 48004 transitions. [2021-06-05 16:53:23,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 16:53:23,249 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:53:23,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:23,271 INFO L225 Difference]: With dead ends: 13949 [2021-06-05 16:53:23,272 INFO L226 Difference]: Without dead ends: 12941 [2021-06-05 16:53:23,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 11631.5ms TimeCoverageRelationStatistics Valid=957, Invalid=4444, Unknown=1, NotChecked=0, Total=5402 [2021-06-05 16:53:23,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12941 states. [2021-06-05 16:53:23,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12941 to 9690. [2021-06-05 16:53:23,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9690 states, 9689 states have (on average 3.617297966766436) internal successors, (35048), 9689 states have internal predecessors, (35048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:23,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9690 states to 9690 states and 35048 transitions. [2021-06-05 16:53:23,440 INFO L78 Accepts]: Start accepts. Automaton has 9690 states and 35048 transitions. Word has length 32 [2021-06-05 16:53:23,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:23,440 INFO L482 AbstractCegarLoop]: Abstraction has 9690 states and 35048 transitions. [2021-06-05 16:53:23,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:23,440 INFO L276 IsEmpty]: Start isEmpty. Operand 9690 states and 35048 transitions. [2021-06-05 16:53:23,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:53:23,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:23,454 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:23,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-05 16:53:23,657 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:23,657 INFO L82 PathProgramCache]: Analyzing trace with hash -643597936, now seen corresponding path program 50 times [2021-06-05 16:53:23,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:23,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913915357] [2021-06-05 16:53:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:24,062 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:24,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:24,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913915357] [2021-06-05 16:53:24,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913915357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:24,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467933510] [2021-06-05 16:53:24,062 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 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 16:53:24,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:53:24,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:24,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:53:24,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:24,194 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 8 treesize of output 7 [2021-06-05 16:53:24,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:24,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:24,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:24,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 16:53:24,232 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 16 treesize of output 18 [2021-06-05 16:53:24,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:24,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:24,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:24,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-06-05 16:53:24,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 23 treesize of output 23 [2021-06-05 16:53:24,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:24,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:24,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:24,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-06-05 16:53:24,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 16:53:24,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:24,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:24,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:24,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 16:53:24,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:53:24,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:53:24,462 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 16:53:24,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 16:53:24,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:24,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:24,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:24,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-05 16:53:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:24,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467933510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:24,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:24,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 16:53:24,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752824519] [2021-06-05 16:53:24,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:53:24,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:24,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:53:24,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:53:24,583 INFO L87 Difference]: Start difference. First operand 9690 states and 35048 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:25,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:25,667 INFO L93 Difference]: Finished difference Result 10881 states and 38680 transitions. [2021-06-05 16:53:25,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:53:25,668 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:53:25,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:25,686 INFO L225 Difference]: With dead ends: 10881 [2021-06-05 16:53:25,686 INFO L226 Difference]: Without dead ends: 10561 [2021-06-05 16:53:25,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1125.1ms TimeCoverageRelationStatistics Valid=299, Invalid=1863, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:53:25,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2021-06-05 16:53:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 9690. [2021-06-05 16:53:25,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9690 states, 9689 states have (on average 3.6100732789761585) internal successors, (34978), 9689 states have internal predecessors, (34978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:25,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9690 states to 9690 states and 34978 transitions. [2021-06-05 16:53:25,841 INFO L78 Accepts]: Start accepts. Automaton has 9690 states and 34978 transitions. Word has length 32 [2021-06-05 16:53:25,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:25,841 INFO L482 AbstractCegarLoop]: Abstraction has 9690 states and 34978 transitions. [2021-06-05 16:53:25,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:25,841 INFO L276 IsEmpty]: Start isEmpty. Operand 9690 states and 34978 transitions. [2021-06-05 16:53:25,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:53:25,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:25,855 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:26,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:26,056 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:26,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:26,056 INFO L82 PathProgramCache]: Analyzing trace with hash 42131912, now seen corresponding path program 51 times [2021-06-05 16:53:26,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:26,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283472153] [2021-06-05 16:53:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:26,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:26,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283472153] [2021-06-05 16:53:26,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283472153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:26,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495789757] [2021-06-05 16:53:26,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:53:26,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:53:26,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:26,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 16:53:26,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:26,593 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 16:53:26,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:26,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:26,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:26,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-06-05 16:53:26,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:53:26,628 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 20 treesize of output 22 [2021-06-05 16:53:26,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:26,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:26,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:26,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-05 16:53:26,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 23 treesize of output 23 [2021-06-05 16:53:26,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:26,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:26,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:26,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:24 [2021-06-05 16:53:26,707 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-05 16:53:26,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 16:53:26,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:26,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:26,718 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 16:53:26,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:36 [2021-06-05 16:53:26,777 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-06-05 16:53:26,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 16:53:26,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:26,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:26,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:53:26,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:43 [2021-06-05 16:53:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:26,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495789757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:26,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:26,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2021-06-05 16:53:26,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526383258] [2021-06-05 16:53:26,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:53:26,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:26,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:53:26,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:53:26,897 INFO L87 Difference]: Start difference. First operand 9690 states and 34978 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:27,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:27,878 INFO L93 Difference]: Finished difference Result 13901 states and 49107 transitions. [2021-06-05 16:53:27,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:53:27,879 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:53:27,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:27,937 INFO L225 Difference]: With dead ends: 13901 [2021-06-05 16:53:27,938 INFO L226 Difference]: Without dead ends: 13475 [2021-06-05 16:53:27,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 906.8ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:53:27,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13475 states. [2021-06-05 16:53:28,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13475 to 8431. [2021-06-05 16:53:28,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8431 states, 8430 states have (on average 3.5896797153024913) internal successors, (30261), 8430 states have internal predecessors, (30261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:28,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8431 states to 8431 states and 30261 transitions. [2021-06-05 16:53:28,071 INFO L78 Accepts]: Start accepts. Automaton has 8431 states and 30261 transitions. Word has length 32 [2021-06-05 16:53:28,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:28,072 INFO L482 AbstractCegarLoop]: Abstraction has 8431 states and 30261 transitions. [2021-06-05 16:53:28,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:28,072 INFO L276 IsEmpty]: Start isEmpty. Operand 8431 states and 30261 transitions. [2021-06-05 16:53:28,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:53:28,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:28,088 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:28,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:28,301 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:28,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:28,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1250586420, now seen corresponding path program 52 times [2021-06-05 16:53:28,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:28,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563221901] [2021-06-05 16:53:28,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:28,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:28,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563221901] [2021-06-05 16:53:28,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563221901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:28,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749903836] [2021-06-05 16:53:28,657 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 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 16:53:28,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:53:28,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:28,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:53:28,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:28,796 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 16:53:28,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:28,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:28,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:28,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 16:53:28,831 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 16 treesize of output 18 [2021-06-05 16:53:28,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:28,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:28,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:28,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 16:53:28,884 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-05 16:53:28,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 16:53:28,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:28,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:28,898 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 16:53:28,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:44 [2021-06-05 16:53:28,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:53:28,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:53:28,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:53:28,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 30 treesize of output 33 [2021-06-05 16:53:28,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:28,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:28,995 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 16:53:28,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:34 [2021-06-05 16:53:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:29,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749903836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:29,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:29,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 16:53:29,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270751966] [2021-06-05 16:53:29,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:53:29,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:29,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:53:29,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:53:29,052 INFO L87 Difference]: Start difference. First operand 8431 states and 30261 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:29,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:29,681 INFO L93 Difference]: Finished difference Result 10312 states and 36179 transitions. [2021-06-05 16:53:29,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:53:29,681 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:53:29,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:29,697 INFO L225 Difference]: With dead ends: 10312 [2021-06-05 16:53:29,698 INFO L226 Difference]: Without dead ends: 10002 [2021-06-05 16:53:29,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 821.3ms TimeCoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:53:29,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10002 states. [2021-06-05 16:53:29,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10002 to 8831. [2021-06-05 16:53:29,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8831 states, 8830 states have (on average 3.5691959229898074) internal successors, (31516), 8830 states have internal predecessors, (31516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:29,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8831 states to 8831 states and 31516 transitions. [2021-06-05 16:53:29,824 INFO L78 Accepts]: Start accepts. Automaton has 8831 states and 31516 transitions. Word has length 32 [2021-06-05 16:53:29,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:29,824 INFO L482 AbstractCegarLoop]: Abstraction has 8831 states and 31516 transitions. [2021-06-05 16:53:29,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:29,824 INFO L276 IsEmpty]: Start isEmpty. Operand 8831 states and 31516 transitions. [2021-06-05 16:53:29,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:53:29,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:29,837 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:30,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:30,038 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:30,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:30,038 INFO L82 PathProgramCache]: Analyzing trace with hash -564856572, now seen corresponding path program 53 times [2021-06-05 16:53:30,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:30,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848850115] [2021-06-05 16:53:30,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:30,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:30,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848850115] [2021-06-05 16:53:30,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848850115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:30,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829933890] [2021-06-05 16:53:30,382 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 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 16:53:30,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:53:30,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:30,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:53:30,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:30,484 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 8 treesize of output 7 [2021-06-05 16:53:30,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:30,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:30,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:30,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-06-05 16:53:30,511 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 16 treesize of output 18 [2021-06-05 16:53:30,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:30,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:30,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:30,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-06-05 16:53:30,558 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-05 16:53:30,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 16:53:30,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:30,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:30,570 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 16:53:30,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:36 [2021-06-05 16:53:30,656 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-06-05 16:53:30,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 16:53:30,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:30,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:30,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:53:30,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:51 [2021-06-05 16:53:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:30,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829933890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:30,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:30,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-06-05 16:53:30,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944725560] [2021-06-05 16:53:30,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:53:30,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:30,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:53:30,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:53:30,848 INFO L87 Difference]: Start difference. First operand 8831 states and 31516 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:32,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:32,443 INFO L93 Difference]: Finished difference Result 16437 states and 56867 transitions. [2021-06-05 16:53:32,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:53:32,443 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:53:32,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:32,470 INFO L225 Difference]: With dead ends: 16437 [2021-06-05 16:53:32,470 INFO L226 Difference]: Without dead ends: 15835 [2021-06-05 16:53:32,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1300.3ms TimeCoverageRelationStatistics Valid=422, Invalid=2334, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:53:32,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15835 states. [2021-06-05 16:53:32,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15835 to 8581. [2021-06-05 16:53:32,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8581 states, 8580 states have (on average 3.5440559440559443) internal successors, (30408), 8580 states have internal predecessors, (30408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:32,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8581 states to 8581 states and 30408 transitions. [2021-06-05 16:53:32,631 INFO L78 Accepts]: Start accepts. Automaton has 8581 states and 30408 transitions. Word has length 32 [2021-06-05 16:53:32,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:32,632 INFO L482 AbstractCegarLoop]: Abstraction has 8581 states and 30408 transitions. [2021-06-05 16:53:32,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:32,632 INFO L276 IsEmpty]: Start isEmpty. Operand 8581 states and 30408 transitions. [2021-06-05 16:53:32,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:53:32,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:32,643 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:32,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 16:53:32,844 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:32,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:32,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1781126392, now seen corresponding path program 54 times [2021-06-05 16:53:32,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:32,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076960256] [2021-06-05 16:53:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:32,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:32,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076960256] [2021-06-05 16:53:32,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076960256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:32,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762510915] [2021-06-05 16:53:32,924 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 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 16:53:32,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:53:32,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:32,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:53:32,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:53:33,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762510915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:33,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:33,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-05 16:53:33,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811576867] [2021-06-05 16:53:33,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:53:33,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:33,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:53:33,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:53:33,136 INFO L87 Difference]: Start difference. First operand 8581 states and 30408 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:35,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:35,987 INFO L93 Difference]: Finished difference Result 24214 states and 79256 transitions. [2021-06-05 16:53:35,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-06-05 16:53:35,988 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:53:35,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:36,023 INFO L225 Difference]: With dead ends: 24214 [2021-06-05 16:53:36,024 INFO L226 Difference]: Without dead ends: 24214 [2021-06-05 16:53:36,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7207 ImplicationChecksByTransitivity, 1918.0ms TimeCoverageRelationStatistics Valid=3677, Invalid=15505, Unknown=0, NotChecked=0, Total=19182 [2021-06-05 16:53:36,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24214 states. [2021-06-05 16:53:36,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24214 to 9398. [2021-06-05 16:53:36,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9397 states have (on average 3.6118974140683195) internal successors, (33941), 9397 states have internal predecessors, (33941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 33941 transitions. [2021-06-05 16:53:36,390 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 33941 transitions. Word has length 36 [2021-06-05 16:53:36,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:36,390 INFO L482 AbstractCegarLoop]: Abstraction has 9398 states and 33941 transitions. [2021-06-05 16:53:36,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:36,390 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 33941 transitions. [2021-06-05 16:53:36,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:53:36,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:36,402 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:36,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:36,603 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:36,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:36,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1765665596, now seen corresponding path program 55 times [2021-06-05 16:53:36,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:36,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575216887] [2021-06-05 16:53:36,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:36,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:36,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575216887] [2021-06-05 16:53:36,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575216887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:36,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058756157] [2021-06-05 16:53:36,666 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 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 16:53:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:36,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:53:36,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:36,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058756157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:36,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:36,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 16:53:36,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326712267] [2021-06-05 16:53:36,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:53:36,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:36,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:53:36,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:53:36,882 INFO L87 Difference]: Start difference. First operand 9398 states and 33941 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:38,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:38,411 INFO L93 Difference]: Finished difference Result 23183 states and 75907 transitions. [2021-06-05 16:53:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:53:38,411 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:53:38,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:38,452 INFO L225 Difference]: With dead ends: 23183 [2021-06-05 16:53:38,452 INFO L226 Difference]: Without dead ends: 23183 [2021-06-05 16:53:38,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2349 ImplicationChecksByTransitivity, 912.7ms TimeCoverageRelationStatistics Valid=1560, Invalid=5246, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 16:53:38,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-06-05 16:53:38,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 9263. [2021-06-05 16:53:38,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9263 states, 9262 states have (on average 3.587670049665299) internal successors, (33229), 9262 states have internal predecessors, (33229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:38,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9263 states to 9263 states and 33229 transitions. [2021-06-05 16:53:38,767 INFO L78 Accepts]: Start accepts. Automaton has 9263 states and 33229 transitions. Word has length 36 [2021-06-05 16:53:38,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:38,767 INFO L482 AbstractCegarLoop]: Abstraction has 9263 states and 33229 transitions. [2021-06-05 16:53:38,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:38,767 INFO L276 IsEmpty]: Start isEmpty. Operand 9263 states and 33229 transitions. [2021-06-05 16:53:38,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:53:38,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:38,780 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:38,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:38,981 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:38,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:38,981 INFO L82 PathProgramCache]: Analyzing trace with hash -610681024, now seen corresponding path program 56 times [2021-06-05 16:53:38,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:38,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710872893] [2021-06-05 16:53:38,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:38,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:39,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:39,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710872893] [2021-06-05 16:53:39,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710872893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:39,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654109087] [2021-06-05 16:53:39,042 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 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 16:53:39,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:53:39,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:39,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:53:39,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:39,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654109087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:39,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:39,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 16:53:39,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390246876] [2021-06-05 16:53:39,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:53:39,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:39,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:53:39,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:53:39,201 INFO L87 Difference]: Start difference. First operand 9263 states and 33229 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:40,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:40,146 INFO L93 Difference]: Finished difference Result 19614 states and 64898 transitions. [2021-06-05 16:53:40,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:53:40,147 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:53:40,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:40,235 INFO L225 Difference]: With dead ends: 19614 [2021-06-05 16:53:40,235 INFO L226 Difference]: Without dead ends: 19614 [2021-06-05 16:53:40,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 528.4ms TimeCoverageRelationStatistics Valid=763, Invalid=2777, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:53:40,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19614 states. [2021-06-05 16:53:40,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19614 to 9363. [2021-06-05 16:53:40,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9363 states, 9362 states have (on average 3.5803247169408245) internal successors, (33519), 9362 states have internal predecessors, (33519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:40,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9363 states to 9363 states and 33519 transitions. [2021-06-05 16:53:40,454 INFO L78 Accepts]: Start accepts. Automaton has 9363 states and 33519 transitions. Word has length 36 [2021-06-05 16:53:40,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:40,454 INFO L482 AbstractCegarLoop]: Abstraction has 9363 states and 33519 transitions. [2021-06-05 16:53:40,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:40,454 INFO L276 IsEmpty]: Start isEmpty. Operand 9363 states and 33519 transitions. [2021-06-05 16:53:40,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:53:40,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:40,467 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:40,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 16:53:40,668 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:40,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:40,668 INFO L82 PathProgramCache]: Analyzing trace with hash -2146021892, now seen corresponding path program 57 times [2021-06-05 16:53:40,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:40,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332617605] [2021-06-05 16:53:40,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:40,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:40,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332617605] [2021-06-05 16:53:40,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332617605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:40,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500001302] [2021-06-05 16:53:40,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:53:40,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:53:40,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:40,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 16:53:40,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:40,827 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 8 treesize of output 7 [2021-06-05 16:53:40,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:40,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:40,836 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 16:53:40,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-05 16:53:40,870 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 16:53:40,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:53:40,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:40,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:40,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:53:40,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-06-05 16:53:40,985 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-05 16:53:40,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 16:53:40,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:40,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:41,001 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 16:53:41,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:46 [2021-06-05 16:53:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-05 16:53:41,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500001302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:41,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:41,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 16:53:41,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014572379] [2021-06-05 16:53:41,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:53:41,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:41,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:53:41,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:53:41,100 INFO L87 Difference]: Start difference. First operand 9363 states and 33519 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:48,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:48,059 INFO L93 Difference]: Finished difference Result 23064 states and 74612 transitions. [2021-06-05 16:53:48,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-06-05 16:53:48,060 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:53:48,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:48,096 INFO L225 Difference]: With dead ends: 23064 [2021-06-05 16:53:48,096 INFO L226 Difference]: Without dead ends: 22846 [2021-06-05 16:53:48,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9982 ImplicationChecksByTransitivity, 3654.0ms TimeCoverageRelationStatistics Valid=3338, Invalid=23068, Unknown=0, NotChecked=0, Total=26406 [2021-06-05 16:53:48,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22846 states. [2021-06-05 16:53:48,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22846 to 10239. [2021-06-05 16:53:48,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10239 states, 10238 states have (on average 3.6391873412775935) internal successors, (37258), 10238 states have internal predecessors, (37258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:48,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10239 states to 10239 states and 37258 transitions. [2021-06-05 16:53:48,438 INFO L78 Accepts]: Start accepts. Automaton has 10239 states and 37258 transitions. Word has length 36 [2021-06-05 16:53:48,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:48,438 INFO L482 AbstractCegarLoop]: Abstraction has 10239 states and 37258 transitions. [2021-06-05 16:53:48,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:48,438 INFO L276 IsEmpty]: Start isEmpty. Operand 10239 states and 37258 transitions. [2021-06-05 16:53:48,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:53:48,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:48,454 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:48,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 16:53:48,654 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:48,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:48,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1242329482, now seen corresponding path program 58 times [2021-06-05 16:53:48,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:48,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279333304] [2021-06-05 16:53:48,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:48,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:48,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279333304] [2021-06-05 16:53:48,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279333304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:48,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682933487] [2021-06-05 16:53:48,701 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 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 16:53:48,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:53:48,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:48,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:53:48,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:48,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682933487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:48,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:48,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 16:53:48,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204151072] [2021-06-05 16:53:48,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:53:48,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:48,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:53:48,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:53:48,887 INFO L87 Difference]: Start difference. First operand 10239 states and 37258 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:51,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:51,071 INFO L93 Difference]: Finished difference Result 24062 states and 79366 transitions. [2021-06-05 16:53:51,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 16:53:51,072 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:53:51,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:51,107 INFO L225 Difference]: With dead ends: 24062 [2021-06-05 16:53:51,107 INFO L226 Difference]: Without dead ends: 24054 [2021-06-05 16:53:51,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4827 ImplicationChecksByTransitivity, 1280.7ms TimeCoverageRelationStatistics Valid=2444, Invalid=10212, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 16:53:51,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24054 states. [2021-06-05 16:53:51,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24054 to 10176. [2021-06-05 16:53:51,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10176 states, 10175 states have (on average 3.6354791154791153) internal successors, (36991), 10175 states have internal predecessors, (36991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:51,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10176 states to 10176 states and 36991 transitions. [2021-06-05 16:53:51,393 INFO L78 Accepts]: Start accepts. Automaton has 10176 states and 36991 transitions. Word has length 36 [2021-06-05 16:53:51,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:51,393 INFO L482 AbstractCegarLoop]: Abstraction has 10176 states and 36991 transitions. [2021-06-05 16:53:51,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:51,393 INFO L276 IsEmpty]: Start isEmpty. Operand 10176 states and 36991 transitions. [2021-06-05 16:53:51,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:53:51,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:51,407 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:51,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:51,608 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:51,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:51,608 INFO L82 PathProgramCache]: Analyzing trace with hash -999630980, now seen corresponding path program 59 times [2021-06-05 16:53:51,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:51,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540895351] [2021-06-05 16:53:51,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:51,650 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:51,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:51,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540895351] [2021-06-05 16:53:51,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540895351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:51,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553585746] [2021-06-05 16:53:51,650 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 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 16:53:51,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:53:51,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:51,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:53:51,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:51,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553585746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:51,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:51,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 16:53:51,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360888763] [2021-06-05 16:53:51,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:53:51,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:51,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:53:51,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:53:51,828 INFO L87 Difference]: Start difference. First operand 10176 states and 36991 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:54,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:54,654 INFO L93 Difference]: Finished difference Result 27302 states and 90504 transitions. [2021-06-05 16:53:54,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-06-05 16:53:54,654 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:53:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:54,707 INFO L225 Difference]: With dead ends: 27302 [2021-06-05 16:53:54,707 INFO L226 Difference]: Without dead ends: 27302 [2021-06-05 16:53:54,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8677 ImplicationChecksByTransitivity, 1903.8ms TimeCoverageRelationStatistics Valid=3708, Invalid=17754, Unknown=0, NotChecked=0, Total=21462 [2021-06-05 16:53:54,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27302 states. [2021-06-05 16:53:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27302 to 10278. [2021-06-05 16:53:55,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10278 states, 10277 states have (on average 3.647562518244624) internal successors, (37486), 10277 states have internal predecessors, (37486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:55,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10278 states to 10278 states and 37486 transitions. [2021-06-05 16:53:55,054 INFO L78 Accepts]: Start accepts. Automaton has 10278 states and 37486 transitions. Word has length 36 [2021-06-05 16:53:55,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:55,055 INFO L482 AbstractCegarLoop]: Abstraction has 10278 states and 37486 transitions. [2021-06-05 16:53:55,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:55,055 INFO L276 IsEmpty]: Start isEmpty. Operand 10278 states and 37486 transitions. [2021-06-05 16:53:55,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:53:55,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:55,069 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:55,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:55,270 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:55,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:55,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1594791238, now seen corresponding path program 60 times [2021-06-05 16:53:55,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:55,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728594854] [2021-06-05 16:53:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:55,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:55,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728594854] [2021-06-05 16:53:55,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728594854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:55,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189002196] [2021-06-05 16:53:55,312 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 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 16:53:55,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 16:53:55,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:55,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:53:55,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:55,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189002196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:55,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:55,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 16:53:55,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808676806] [2021-06-05 16:53:55,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:53:55,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:55,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:53:55,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:53:55,521 INFO L87 Difference]: Start difference. First operand 10278 states and 37486 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:56,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:56,440 INFO L93 Difference]: Finished difference Result 23076 states and 77948 transitions. [2021-06-05 16:53:56,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:53:56,440 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:53:56,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:56,479 INFO L225 Difference]: With dead ends: 23076 [2021-06-05 16:53:56,480 INFO L226 Difference]: Without dead ends: 23064 [2021-06-05 16:53:56,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 510.3ms TimeCoverageRelationStatistics Valid=771, Invalid=2535, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:53:56,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23064 states. [2021-06-05 16:53:56,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23064 to 10277. [2021-06-05 16:53:56,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10277 states, 10276 states have (on average 3.6474309069676916) internal successors, (37481), 10276 states have internal predecessors, (37481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 37481 transitions. [2021-06-05 16:53:56,797 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 37481 transitions. Word has length 36 [2021-06-05 16:53:56,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:56,797 INFO L482 AbstractCegarLoop]: Abstraction has 10277 states and 37481 transitions. [2021-06-05 16:53:56,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:56,797 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 37481 transitions. [2021-06-05 16:53:56,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:53:56,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:56,812 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:57,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:57,013 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:57,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:57,013 INFO L82 PathProgramCache]: Analyzing trace with hash 619738612, now seen corresponding path program 61 times [2021-06-05 16:53:57,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:57,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457021641] [2021-06-05 16:53:57,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:57,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:57,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457021641] [2021-06-05 16:53:57,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457021641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:57,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463728614] [2021-06-05 16:53:57,069 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 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 16:53:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:57,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:53:57,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:57,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463728614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:57,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:57,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 16:53:57,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151985299] [2021-06-05 16:53:57,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:53:57,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:57,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:53:57,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:53:57,231 INFO L87 Difference]: Start difference. First operand 10277 states and 37481 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:58,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:58,034 INFO L93 Difference]: Finished difference Result 21184 states and 71447 transitions. [2021-06-05 16:53:58,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:53:58,035 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:53:58,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:58,075 INFO L225 Difference]: With dead ends: 21184 [2021-06-05 16:53:58,075 INFO L226 Difference]: Without dead ends: 21184 [2021-06-05 16:53:58,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 458.3ms TimeCoverageRelationStatistics Valid=579, Invalid=1971, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:53:58,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21184 states. [2021-06-05 16:53:58,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21184 to 10309. [2021-06-05 16:53:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10309 states, 10308 states have (on average 3.646779200620877) internal successors, (37591), 10308 states have internal predecessors, (37591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10309 states to 10309 states and 37591 transitions. [2021-06-05 16:53:58,384 INFO L78 Accepts]: Start accepts. Automaton has 10309 states and 37591 transitions. Word has length 36 [2021-06-05 16:53:58,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:58,385 INFO L482 AbstractCegarLoop]: Abstraction has 10309 states and 37591 transitions. [2021-06-05 16:53:58,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:58,385 INFO L276 IsEmpty]: Start isEmpty. Operand 10309 states and 37591 transitions. [2021-06-05 16:53:58,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:53:58,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:58,399 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:58,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:58,600 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:58,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:58,600 INFO L82 PathProgramCache]: Analyzing trace with hash 334296516, now seen corresponding path program 62 times [2021-06-05 16:53:58,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:58,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877568961] [2021-06-05 16:53:58,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:58,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:58,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877568961] [2021-06-05 16:53:58,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877568961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:58,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950566941] [2021-06-05 16:53:58,653 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 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 16:53:58,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:53:58,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:58,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:53:58,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:58,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950566941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:58,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:58,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 16:53:58,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930392332] [2021-06-05 16:53:58,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:53:58,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:58,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:53:58,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:53:58,839 INFO L87 Difference]: Start difference. First operand 10309 states and 37591 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:59,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:59,953 INFO L93 Difference]: Finished difference Result 22583 states and 75226 transitions. [2021-06-05 16:53:59,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 16:53:59,954 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:53:59,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:59,990 INFO L225 Difference]: With dead ends: 22583 [2021-06-05 16:53:59,990 INFO L226 Difference]: Without dead ends: 22583 [2021-06-05 16:53:59,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 682.9ms TimeCoverageRelationStatistics Valid=1128, Invalid=3984, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 16:54:00,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22583 states. [2021-06-05 16:54:00,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22583 to 10288. [2021-06-05 16:54:00,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10288 states, 10287 states have (on average 3.621950034023525) internal successors, (37259), 10287 states have internal predecessors, (37259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:00,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10288 states to 10288 states and 37259 transitions. [2021-06-05 16:54:00,312 INFO L78 Accepts]: Start accepts. Automaton has 10288 states and 37259 transitions. Word has length 36 [2021-06-05 16:54:00,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:00,313 INFO L482 AbstractCegarLoop]: Abstraction has 10288 states and 37259 transitions. [2021-06-05 16:54:00,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:00,313 INFO L276 IsEmpty]: Start isEmpty. Operand 10288 states and 37259 transitions. [2021-06-05 16:54:00,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:54:00,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:00,327 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:00,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:00,528 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:00,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:00,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1645233024, now seen corresponding path program 63 times [2021-06-05 16:54:00,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:00,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871385019] [2021-06-05 16:54:00,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:00,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:00,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871385019] [2021-06-05 16:54:00,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871385019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:00,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204992452] [2021-06-05 16:54:00,581 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 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 16:54:00,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:54:00,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:00,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 16:54:00,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:00,708 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 8 treesize of output 7 [2021-06-05 16:54:00,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:00,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:00,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:00,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:22 [2021-06-05 16:54:00,746 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 16:54:00,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:54:00,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:00,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:00,756 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 16:54:00,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:34 [2021-06-05 16:54:00,828 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-05 16:54:00,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 16:54:00,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:00,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:00,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:54:00,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:49 [2021-06-05 16:54:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 16:54:00,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204992452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:00,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:00,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 16:54:00,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070070174] [2021-06-05 16:54:00,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:54:00,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:00,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:54:00,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:54:00,990 INFO L87 Difference]: Start difference. First operand 10288 states and 37259 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:05,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:05,192 INFO L93 Difference]: Finished difference Result 20591 states and 67124 transitions. [2021-06-05 16:54:05,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 16:54:05,192 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:54:05,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:05,225 INFO L225 Difference]: With dead ends: 20591 [2021-06-05 16:54:05,225 INFO L226 Difference]: Without dead ends: 20576 [2021-06-05 16:54:05,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5098 ImplicationChecksByTransitivity, 2836.2ms TimeCoverageRelationStatistics Valid=1942, Invalid=12578, Unknown=0, NotChecked=0, Total=14520 [2021-06-05 16:54:05,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20576 states. [2021-06-05 16:54:05,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20576 to 11680. [2021-06-05 16:54:05,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11680 states, 11679 states have (on average 3.5503895881496703) internal successors, (41465), 11679 states have internal predecessors, (41465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:05,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11680 states to 11680 states and 41465 transitions. [2021-06-05 16:54:05,525 INFO L78 Accepts]: Start accepts. Automaton has 11680 states and 41465 transitions. Word has length 36 [2021-06-05 16:54:05,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:05,525 INFO L482 AbstractCegarLoop]: Abstraction has 11680 states and 41465 transitions. [2021-06-05 16:54:05,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:05,525 INFO L276 IsEmpty]: Start isEmpty. Operand 11680 states and 41465 transitions. [2021-06-05 16:54:05,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:54:05,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:05,542 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:05,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 16:54:05,757 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:05,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:05,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1594356878, now seen corresponding path program 64 times [2021-06-05 16:54:05,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:05,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530192183] [2021-06-05 16:54:05,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:05,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:05,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530192183] [2021-06-05 16:54:05,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530192183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:05,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596364436] [2021-06-05 16:54:05,855 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 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 16:54:05,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:54:05,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:05,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:54:05,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:06,028 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:06,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596364436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:06,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:06,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 16:54:06,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350228989] [2021-06-05 16:54:06,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:54:06,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:06,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:54:06,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:54:06,030 INFO L87 Difference]: Start difference. First operand 11680 states and 41465 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:08,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:08,188 INFO L93 Difference]: Finished difference Result 24526 states and 80567 transitions. [2021-06-05 16:54:08,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 16:54:08,188 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:54:08,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:08,230 INFO L225 Difference]: With dead ends: 24526 [2021-06-05 16:54:08,231 INFO L226 Difference]: Without dead ends: 24518 [2021-06-05 16:54:08,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 1370.3ms TimeCoverageRelationStatistics Valid=2276, Invalid=11766, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 16:54:08,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24518 states. [2021-06-05 16:54:08,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24518 to 10224. [2021-06-05 16:54:08,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10224 states, 10223 states have (on average 3.5769343636897193) internal successors, (36567), 10223 states have internal predecessors, (36567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:08,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10224 states to 10224 states and 36567 transitions. [2021-06-05 16:54:08,528 INFO L78 Accepts]: Start accepts. Automaton has 10224 states and 36567 transitions. Word has length 36 [2021-06-05 16:54:08,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:08,528 INFO L482 AbstractCegarLoop]: Abstraction has 10224 states and 36567 transitions. [2021-06-05 16:54:08,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:08,528 INFO L276 IsEmpty]: Start isEmpty. Operand 10224 states and 36567 transitions. [2021-06-05 16:54:08,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:54:08,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:08,542 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:08,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:08,743 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:08,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:08,743 INFO L82 PathProgramCache]: Analyzing trace with hash 649769798, now seen corresponding path program 22 times [2021-06-05 16:54:08,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:08,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308967572] [2021-06-05 16:54:08,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:08,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:08,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308967572] [2021-06-05 16:54:08,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308967572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:08,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540011621] [2021-06-05 16:54:08,790 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 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 16:54:08,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:54:08,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:08,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:54:08,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:08,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540011621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:08,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:08,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 16:54:08,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759997539] [2021-06-05 16:54:08,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:54:08,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:08,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:54:08,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:54:08,960 INFO L87 Difference]: Start difference. First operand 10224 states and 36567 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:10,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:10,155 INFO L93 Difference]: Finished difference Result 23351 states and 75809 transitions. [2021-06-05 16:54:10,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 16:54:10,155 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:54:10,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:10,192 INFO L225 Difference]: With dead ends: 23351 [2021-06-05 16:54:10,192 INFO L226 Difference]: Without dead ends: 23351 [2021-06-05 16:54:10,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1978 ImplicationChecksByTransitivity, 728.1ms TimeCoverageRelationStatistics Valid=1338, Invalid=4514, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 16:54:10,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23351 states. [2021-06-05 16:54:10,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23351 to 10314. [2021-06-05 16:54:10,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10314 states, 10313 states have (on average 3.570638999321245) internal successors, (36824), 10313 states have internal predecessors, (36824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:10,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10314 states to 10314 states and 36824 transitions. [2021-06-05 16:54:10,470 INFO L78 Accepts]: Start accepts. Automaton has 10314 states and 36824 transitions. Word has length 36 [2021-06-05 16:54:10,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:10,471 INFO L482 AbstractCegarLoop]: Abstraction has 10314 states and 36824 transitions. [2021-06-05 16:54:10,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:10,471 INFO L276 IsEmpty]: Start isEmpty. Operand 10314 states and 36824 transitions. [2021-06-05 16:54:10,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:54:10,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:10,485 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:10,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 16:54:10,685 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:10,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:10,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1914163660, now seen corresponding path program 23 times [2021-06-05 16:54:10,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:10,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858939774] [2021-06-05 16:54:10,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:10,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:10,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858939774] [2021-06-05 16:54:10,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858939774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:10,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332604078] [2021-06-05 16:54:10,746 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 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 16:54:10,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 16:54:10,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:10,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:54:10,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:10,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332604078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:10,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:10,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 16:54:10,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128819705] [2021-06-05 16:54:10,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:54:10,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:10,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:54:10,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:54:10,914 INFO L87 Difference]: Start difference. First operand 10314 states and 36824 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:14,175 INFO L93 Difference]: Finished difference Result 25345 states and 80932 transitions. [2021-06-05 16:54:14,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-06-05 16:54:14,175 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:54:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:14,219 INFO L225 Difference]: With dead ends: 25345 [2021-06-05 16:54:14,219 INFO L226 Difference]: Without dead ends: 25341 [2021-06-05 16:54:14,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12290 ImplicationChecksByTransitivity, 2292.3ms TimeCoverageRelationStatistics Valid=4827, Invalid=25275, Unknown=0, NotChecked=0, Total=30102 [2021-06-05 16:54:14,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25341 states. [2021-06-05 16:54:14,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25341 to 10697. [2021-06-05 16:54:14,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10697 states, 10696 states have (on average 3.5331899775617055) internal successors, (37791), 10696 states have internal predecessors, (37791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:14,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10697 states to 10697 states and 37791 transitions. [2021-06-05 16:54:14,503 INFO L78 Accepts]: Start accepts. Automaton has 10697 states and 37791 transitions. Word has length 36 [2021-06-05 16:54:14,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:14,504 INFO L482 AbstractCegarLoop]: Abstraction has 10697 states and 37791 transitions. [2021-06-05 16:54:14,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:14,504 INFO L276 IsEmpty]: Start isEmpty. Operand 10697 states and 37791 transitions. [2021-06-05 16:54:14,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:54:14,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:14,520 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:14,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 16:54:14,720 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:14,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:14,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1955379200, now seen corresponding path program 65 times [2021-06-05 16:54:14,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:14,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707312867] [2021-06-05 16:54:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:14,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:14,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707312867] [2021-06-05 16:54:14,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707312867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:14,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634846694] [2021-06-05 16:54:14,762 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 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 16:54:14,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:54:14,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:14,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:54:14,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:14,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634846694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:14,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:14,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 16:54:14,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461251559] [2021-06-05 16:54:14,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:54:14,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:14,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:54:14,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:54:14,922 INFO L87 Difference]: Start difference. First operand 10697 states and 37791 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:15,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:15,934 INFO L93 Difference]: Finished difference Result 28584 states and 95318 transitions. [2021-06-05 16:54:15,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:54:15,934 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:54:15,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:15,987 INFO L225 Difference]: With dead ends: 28584 [2021-06-05 16:54:15,987 INFO L226 Difference]: Without dead ends: 28584 [2021-06-05 16:54:15,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 579.1ms TimeCoverageRelationStatistics Valid=1025, Invalid=2757, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:54:16,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28584 states. [2021-06-05 16:54:16,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28584 to 11040. [2021-06-05 16:54:16,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11040 states, 11039 states have (on average 3.5667179998188243) internal successors, (39373), 11039 states have internal predecessors, (39373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:16,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11040 states to 11040 states and 39373 transitions. [2021-06-05 16:54:16,346 INFO L78 Accepts]: Start accepts. Automaton has 11040 states and 39373 transitions. Word has length 36 [2021-06-05 16:54:16,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:16,346 INFO L482 AbstractCegarLoop]: Abstraction has 11040 states and 39373 transitions. [2021-06-05 16:54:16,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:16,346 INFO L276 IsEmpty]: Start isEmpty. Operand 11040 states and 39373 transitions. [2021-06-05 16:54:16,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:54:16,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:16,361 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:16,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:16,573 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:16,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:16,573 INFO L82 PathProgramCache]: Analyzing trace with hash 835382162, now seen corresponding path program 66 times [2021-06-05 16:54:16,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:16,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008721693] [2021-06-05 16:54:16,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:16,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:16,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008721693] [2021-06-05 16:54:16,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008721693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:16,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431131396] [2021-06-05 16:54:16,610 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 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 16:54:16,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:54:16,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:16,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:54:16,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:16,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431131396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:16,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:16,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 16:54:16,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131740347] [2021-06-05 16:54:16,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:54:16,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:16,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:54:16,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:54:16,790 INFO L87 Difference]: Start difference. First operand 11040 states and 39373 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:18,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:18,828 INFO L93 Difference]: Finished difference Result 28065 states and 91868 transitions. [2021-06-05 16:54:18,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 16:54:18,828 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:54:18,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:18,876 INFO L225 Difference]: With dead ends: 28065 [2021-06-05 16:54:18,876 INFO L226 Difference]: Without dead ends: 28057 [2021-06-05 16:54:18,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4765 ImplicationChecksByTransitivity, 1272.3ms TimeCoverageRelationStatistics Valid=2261, Invalid=10171, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 16:54:18,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28057 states. [2021-06-05 16:54:19,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28057 to 11031. [2021-06-05 16:54:19,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11031 states, 11030 states have (on average 3.565185856754306) internal successors, (39324), 11030 states have internal predecessors, (39324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:19,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11031 states to 11031 states and 39324 transitions. [2021-06-05 16:54:19,211 INFO L78 Accepts]: Start accepts. Automaton has 11031 states and 39324 transitions. Word has length 36 [2021-06-05 16:54:19,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:19,211 INFO L482 AbstractCegarLoop]: Abstraction has 11031 states and 39324 transitions. [2021-06-05 16:54:19,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:19,211 INFO L276 IsEmpty]: Start isEmpty. Operand 11031 states and 39324 transitions. [2021-06-05 16:54:19,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:54:19,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:19,226 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:19,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:19,427 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:19,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:19,427 INFO L82 PathProgramCache]: Analyzing trace with hash -645736056, now seen corresponding path program 67 times [2021-06-05 16:54:19,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:19,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659441532] [2021-06-05 16:54:19,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:19,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:19,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659441532] [2021-06-05 16:54:19,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659441532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:19,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329611666] [2021-06-05 16:54:19,549 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 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 16:54:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:19,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:54:19,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:19,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329611666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:19,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:19,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 16:54:19,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763715346] [2021-06-05 16:54:19,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:54:19,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:19,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:54:19,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:54:19,713 INFO L87 Difference]: Start difference. First operand 11031 states and 39324 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:21,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:21,018 INFO L93 Difference]: Finished difference Result 25852 states and 84621 transitions. [2021-06-05 16:54:21,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 16:54:21,018 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:54:21,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:21,064 INFO L225 Difference]: With dead ends: 25852 [2021-06-05 16:54:21,064 INFO L226 Difference]: Without dead ends: 25852 [2021-06-05 16:54:21,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 808.2ms TimeCoverageRelationStatistics Valid=1383, Invalid=4019, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 16:54:21,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25852 states. [2021-06-05 16:54:21,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25852 to 11109. [2021-06-05 16:54:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11109 states, 11108 states have (on average 3.5620273676629455) internal successors, (39567), 11108 states have internal predecessors, (39567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:21,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11109 states to 11109 states and 39567 transitions. [2021-06-05 16:54:21,373 INFO L78 Accepts]: Start accepts. Automaton has 11109 states and 39567 transitions. Word has length 36 [2021-06-05 16:54:21,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:21,373 INFO L482 AbstractCegarLoop]: Abstraction has 11109 states and 39567 transitions. [2021-06-05 16:54:21,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:21,373 INFO L276 IsEmpty]: Start isEmpty. Operand 11109 states and 39567 transitions. [2021-06-05 16:54:21,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:54:21,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:21,388 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:21,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:21,589 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:21,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:21,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1701113450, now seen corresponding path program 68 times [2021-06-05 16:54:21,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:21,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150847691] [2021-06-05 16:54:21,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:21,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:21,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150847691] [2021-06-05 16:54:21,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150847691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:21,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769207485] [2021-06-05 16:54:21,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:54:21,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:21,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:21,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:54:21,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:21,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769207485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:21,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:21,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 16:54:21,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350289794] [2021-06-05 16:54:21,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:54:21,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:21,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:54:21,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:54:21,819 INFO L87 Difference]: Start difference. First operand 11109 states and 39567 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:24,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:24,306 INFO L93 Difference]: Finished difference Result 26133 states and 85715 transitions. [2021-06-05 16:54:24,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 16:54:24,307 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:54:24,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:24,355 INFO L225 Difference]: With dead ends: 26133 [2021-06-05 16:54:24,355 INFO L226 Difference]: Without dead ends: 26125 [2021-06-05 16:54:24,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5792 ImplicationChecksByTransitivity, 1475.3ms TimeCoverageRelationStatistics Valid=2641, Invalid=12859, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 16:54:24,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26125 states. [2021-06-05 16:54:24,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26125 to 10815. [2021-06-05 16:54:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10815 states, 10814 states have (on average 3.549935269095617) internal successors, (38389), 10814 states have internal predecessors, (38389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10815 states to 10815 states and 38389 transitions. [2021-06-05 16:54:24,680 INFO L78 Accepts]: Start accepts. Automaton has 10815 states and 38389 transitions. Word has length 36 [2021-06-05 16:54:24,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:24,680 INFO L482 AbstractCegarLoop]: Abstraction has 10815 states and 38389 transitions. [2021-06-05 16:54:24,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:24,680 INFO L276 IsEmpty]: Start isEmpty. Operand 10815 states and 38389 transitions. [2021-06-05 16:54:24,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:54:24,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:24,695 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:24,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-06-05 16:54:24,895 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:24,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:24,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1129408980, now seen corresponding path program 69 times [2021-06-05 16:54:24,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:24,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113661103] [2021-06-05 16:54:24,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:24,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:24,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113661103] [2021-06-05 16:54:24,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113661103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:24,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987006086] [2021-06-05 16:54:24,941 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 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 16:54:24,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 16:54:24,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:24,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:54:24,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:25,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987006086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:25,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:25,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 16:54:25,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256716780] [2021-06-05 16:54:25,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:54:25,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:25,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:54:25,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:54:25,088 INFO L87 Difference]: Start difference. First operand 10815 states and 38389 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:26,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:26,626 INFO L93 Difference]: Finished difference Result 25481 states and 83280 transitions. [2021-06-05 16:54:26,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 16:54:26,626 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:54:26,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:26,675 INFO L225 Difference]: With dead ends: 25481 [2021-06-05 16:54:26,675 INFO L226 Difference]: Without dead ends: 25421 [2021-06-05 16:54:26,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3412 ImplicationChecksByTransitivity, 985.8ms TimeCoverageRelationStatistics Valid=1884, Invalid=7622, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 16:54:26,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25421 states. [2021-06-05 16:54:27,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25421 to 10825. [2021-06-05 16:54:27,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10825 states, 10824 states have (on average 3.5495195861049518) internal successors, (38420), 10824 states have internal predecessors, (38420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10825 states to 10825 states and 38420 transitions. [2021-06-05 16:54:27,056 INFO L78 Accepts]: Start accepts. Automaton has 10825 states and 38420 transitions. Word has length 36 [2021-06-05 16:54:27,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:27,056 INFO L482 AbstractCegarLoop]: Abstraction has 10825 states and 38420 transitions. [2021-06-05 16:54:27,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:27,056 INFO L276 IsEmpty]: Start isEmpty. Operand 10825 states and 38420 transitions. [2021-06-05 16:54:27,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:54:27,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:27,072 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:27,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:27,272 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:27,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:27,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1944063276, now seen corresponding path program 70 times [2021-06-05 16:54:27,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:27,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488681334] [2021-06-05 16:54:27,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:27,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:27,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488681334] [2021-06-05 16:54:27,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488681334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:27,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150553368] [2021-06-05 16:54:27,319 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 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 16:54:27,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:54:27,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:27,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:54:27,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:27,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150553368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:27,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:27,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 16:54:27,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653045192] [2021-06-05 16:54:27,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:54:27,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:27,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:54:27,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:54:27,460 INFO L87 Difference]: Start difference. First operand 10825 states and 38420 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:28,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:28,521 INFO L93 Difference]: Finished difference Result 25553 states and 83090 transitions. [2021-06-05 16:54:28,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:54:28,522 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:54:28,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:28,567 INFO L225 Difference]: With dead ends: 25553 [2021-06-05 16:54:28,567 INFO L226 Difference]: Without dead ends: 25553 [2021-06-05 16:54:28,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 602.3ms TimeCoverageRelationStatistics Valid=1205, Invalid=3625, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:54:28,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25553 states. [2021-06-05 16:54:28,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25553 to 11156. [2021-06-05 16:54:28,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11156 states, 11155 states have (on average 3.528731510533393) internal successors, (39363), 11155 states have internal predecessors, (39363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:28,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11156 states to 11156 states and 39363 transitions. [2021-06-05 16:54:28,899 INFO L78 Accepts]: Start accepts. Automaton has 11156 states and 39363 transitions. Word has length 36 [2021-06-05 16:54:28,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:28,899 INFO L482 AbstractCegarLoop]: Abstraction has 11156 states and 39363 transitions. [2021-06-05 16:54:28,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:28,900 INFO L276 IsEmpty]: Start isEmpty. Operand 11156 states and 39363 transitions. [2021-06-05 16:54:28,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:54:28,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:28,915 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:29,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 16:54:29,115 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:29,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:29,115 INFO L82 PathProgramCache]: Analyzing trace with hash -417474388, now seen corresponding path program 71 times [2021-06-05 16:54:29,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:29,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763142210] [2021-06-05 16:54:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:29,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:29,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763142210] [2021-06-05 16:54:29,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763142210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:29,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998336941] [2021-06-05 16:54:29,161 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 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 16:54:29,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 16:54:29,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:29,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:54:29,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:29,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998336941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:29,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:29,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 16:54:29,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818784201] [2021-06-05 16:54:29,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:54:29,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:29,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:54:29,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:54:29,326 INFO L87 Difference]: Start difference. First operand 11156 states and 39363 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:31,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:31,005 INFO L93 Difference]: Finished difference Result 24060 states and 79445 transitions. [2021-06-05 16:54:31,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 16:54:31,005 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:54:31,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:31,044 INFO L225 Difference]: With dead ends: 24060 [2021-06-05 16:54:31,044 INFO L226 Difference]: Without dead ends: 23988 [2021-06-05 16:54:31,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3341 ImplicationChecksByTransitivity, 1036.9ms TimeCoverageRelationStatistics Valid=1989, Invalid=7323, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 16:54:31,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23988 states. [2021-06-05 16:54:31,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23988 to 11635. [2021-06-05 16:54:31,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11635 states, 11634 states have (on average 3.5373044524669073) internal successors, (41153), 11634 states have internal predecessors, (41153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 41153 transitions. [2021-06-05 16:54:31,348 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 41153 transitions. Word has length 36 [2021-06-05 16:54:31,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:31,348 INFO L482 AbstractCegarLoop]: Abstraction has 11635 states and 41153 transitions. [2021-06-05 16:54:31,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:31,348 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 41153 transitions. [2021-06-05 16:54:31,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:54:31,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:31,364 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:31,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:31,564 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:31,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:31,564 INFO L82 PathProgramCache]: Analyzing trace with hash -56872508, now seen corresponding path program 72 times [2021-06-05 16:54:31,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:31,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715640975] [2021-06-05 16:54:31,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:31,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:31,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715640975] [2021-06-05 16:54:31,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715640975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:31,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864973258] [2021-06-05 16:54:31,605 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 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 16:54:31,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:54:31,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:31,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:54:31,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:31,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864973258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:31,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:31,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 16:54:31,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661407958] [2021-06-05 16:54:31,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:54:31,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:31,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:54:31,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:54:31,781 INFO L87 Difference]: Start difference. First operand 11635 states and 41153 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:34,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:34,193 INFO L93 Difference]: Finished difference Result 32188 states and 105890 transitions. [2021-06-05 16:54:34,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-06-05 16:54:34,194 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:54:34,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:34,253 INFO L225 Difference]: With dead ends: 32188 [2021-06-05 16:54:34,253 INFO L226 Difference]: Without dead ends: 32188 [2021-06-05 16:54:34,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7629 ImplicationChecksByTransitivity, 1652.1ms TimeCoverageRelationStatistics Valid=3449, Invalid=15183, Unknown=0, NotChecked=0, Total=18632 [2021-06-05 16:54:34,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32188 states. [2021-06-05 16:54:34,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32188 to 11859. [2021-06-05 16:54:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11859 states, 11858 states have (on average 3.5428402766065106) internal successors, (42011), 11858 states have internal predecessors, (42011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:34,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11859 states to 11859 states and 42011 transitions. [2021-06-05 16:54:34,648 INFO L78 Accepts]: Start accepts. Automaton has 11859 states and 42011 transitions. Word has length 36 [2021-06-05 16:54:34,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:34,648 INFO L482 AbstractCegarLoop]: Abstraction has 11859 states and 42011 transitions. [2021-06-05 16:54:34,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:34,648 INFO L276 IsEmpty]: Start isEmpty. Operand 11859 states and 42011 transitions. [2021-06-05 16:54:34,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:54:34,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:34,663 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:34,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:34,864 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:34,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:34,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1328456694, now seen corresponding path program 73 times [2021-06-05 16:54:34,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:34,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373753710] [2021-06-05 16:54:34,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:34,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:34,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373753710] [2021-06-05 16:54:34,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373753710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:34,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099108498] [2021-06-05 16:54:34,910 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 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 16:54:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:34,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:54:34,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:35,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099108498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:35,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:35,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 16:54:35,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588055173] [2021-06-05 16:54:35,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:54:35,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:35,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:54:35,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:54:35,075 INFO L87 Difference]: Start difference. First operand 11859 states and 42011 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:35,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:35,966 INFO L93 Difference]: Finished difference Result 21337 states and 71691 transitions. [2021-06-05 16:54:35,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:54:35,967 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:54:35,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:36,006 INFO L225 Difference]: With dead ends: 21337 [2021-06-05 16:54:36,006 INFO L226 Difference]: Without dead ends: 21337 [2021-06-05 16:54:36,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 468.3ms TimeCoverageRelationStatistics Valid=705, Invalid=2375, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:54:36,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21337 states. [2021-06-05 16:54:36,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21337 to 12014. [2021-06-05 16:54:36,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12014 states, 12013 states have (on average 3.539082660451178) internal successors, (42515), 12013 states have internal predecessors, (42515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:36,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12014 states to 12014 states and 42515 transitions. [2021-06-05 16:54:36,349 INFO L78 Accepts]: Start accepts. Automaton has 12014 states and 42515 transitions. Word has length 36 [2021-06-05 16:54:36,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:36,349 INFO L482 AbstractCegarLoop]: Abstraction has 12014 states and 42515 transitions. [2021-06-05 16:54:36,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:36,349 INFO L276 IsEmpty]: Start isEmpty. Operand 12014 states and 42515 transitions. [2021-06-05 16:54:36,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:54:36,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:36,366 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:36,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 16:54:36,566 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:36,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:36,567 INFO L82 PathProgramCache]: Analyzing trace with hash -757061290, now seen corresponding path program 74 times [2021-06-05 16:54:36,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:36,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025584580] [2021-06-05 16:54:36,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:36,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:36,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025584580] [2021-06-05 16:54:36,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025584580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:36,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753579443] [2021-06-05 16:54:36,614 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 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 16:54:36,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:36,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:36,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:54:36,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:54:36,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753579443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:36,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:36,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 16:54:36,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594348473] [2021-06-05 16:54:36,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:54:36,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:36,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:54:36,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:54:36,781 INFO L87 Difference]: Start difference. First operand 12014 states and 42515 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:38,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:38,521 INFO L93 Difference]: Finished difference Result 23584 states and 78972 transitions. [2021-06-05 16:54:38,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 16:54:38,522 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:54:38,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:38,561 INFO L225 Difference]: With dead ends: 23584 [2021-06-05 16:54:38,561 INFO L226 Difference]: Without dead ends: 23568 [2021-06-05 16:54:38,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4149 ImplicationChecksByTransitivity, 1119.5ms TimeCoverageRelationStatistics Valid=2031, Invalid=9311, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 16:54:38,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23568 states. [2021-06-05 16:54:38,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23568 to 12014. [2021-06-05 16:54:38,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12014 states, 12013 states have (on average 3.5387496878381755) internal successors, (42511), 12013 states have internal predecessors, (42511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:38,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12014 states to 12014 states and 42511 transitions. [2021-06-05 16:54:38,868 INFO L78 Accepts]: Start accepts. Automaton has 12014 states and 42511 transitions. Word has length 36 [2021-06-05 16:54:38,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:38,868 INFO L482 AbstractCegarLoop]: Abstraction has 12014 states and 42511 transitions. [2021-06-05 16:54:38,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:38,868 INFO L276 IsEmpty]: Start isEmpty. Operand 12014 states and 42511 transitions. [2021-06-05 16:54:38,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:54:38,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:38,885 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:39,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:39,087 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:39,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:39,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1893700292, now seen corresponding path program 24 times [2021-06-05 16:54:39,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:39,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66514492] [2021-06-05 16:54:39,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:39,133 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:39,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:39,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66514492] [2021-06-05 16:54:39,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66514492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:39,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616872923] [2021-06-05 16:54:39,133 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 16:54:39,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:54:39,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:39,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:54:39,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:54:39,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616872923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:39,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:39,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 16:54:39,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330826125] [2021-06-05 16:54:39,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:54:39,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:39,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:54:39,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:54:39,395 INFO L87 Difference]: Start difference. First operand 12014 states and 42511 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:43,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:43,022 INFO L93 Difference]: Finished difference Result 24185 states and 80281 transitions. [2021-06-05 16:54:43,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2021-06-05 16:54:43,022 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:54:43,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:43,062 INFO L225 Difference]: With dead ends: 24185 [2021-06-05 16:54:43,063 INFO L226 Difference]: Without dead ends: 24161 [2021-06-05 16:54:43,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15417 ImplicationChecksByTransitivity, 2610.1ms TimeCoverageRelationStatistics Valid=5544, Invalid=31128, Unknown=0, NotChecked=0, Total=36672 [2021-06-05 16:54:43,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24161 states. [2021-06-05 16:54:43,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24161 to 12318. [2021-06-05 16:54:43,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12318 states, 12317 states have (on average 3.522935779816514) internal successors, (43392), 12317 states have internal predecessors, (43392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12318 states to 12318 states and 43392 transitions. [2021-06-05 16:54:43,412 INFO L78 Accepts]: Start accepts. Automaton has 12318 states and 43392 transitions. Word has length 36 [2021-06-05 16:54:43,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:43,412 INFO L482 AbstractCegarLoop]: Abstraction has 12318 states and 43392 transitions. [2021-06-05 16:54:43,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:43,412 INFO L276 IsEmpty]: Start isEmpty. Operand 12318 states and 43392 transitions. [2021-06-05 16:54:43,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:54:43,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:43,429 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:43,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:43,629 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:43,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:43,630 INFO L82 PathProgramCache]: Analyzing trace with hash 14650632, now seen corresponding path program 75 times [2021-06-05 16:54:43,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:43,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338631251] [2021-06-05 16:54:43,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:43,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:43,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338631251] [2021-06-05 16:54:43,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338631251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:43,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663473549] [2021-06-05 16:54:43,696 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 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 16:54:43,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 16:54:43,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:43,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:54:43,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:43,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663473549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:43,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:43,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 16:54:43,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048021362] [2021-06-05 16:54:43,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:54:43,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:43,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:54:43,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:54:43,857 INFO L87 Difference]: Start difference. First operand 12318 states and 43392 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:44,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:44,884 INFO L93 Difference]: Finished difference Result 30224 states and 99175 transitions. [2021-06-05 16:54:44,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:54:44,884 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:54:44,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:44,938 INFO L225 Difference]: With dead ends: 30224 [2021-06-05 16:54:44,938 INFO L226 Difference]: Without dead ends: 30224 [2021-06-05 16:54:44,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 598.3ms TimeCoverageRelationStatistics Valid=959, Invalid=2701, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:54:44,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30224 states. [2021-06-05 16:54:45,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30224 to 13376. [2021-06-05 16:54:45,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13376 states, 13375 states have (on average 3.5404859813084113) internal successors, (47354), 13375 states have internal predecessors, (47354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:45,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13376 states to 13376 states and 47354 transitions. [2021-06-05 16:54:45,336 INFO L78 Accepts]: Start accepts. Automaton has 13376 states and 47354 transitions. Word has length 36 [2021-06-05 16:54:45,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:45,336 INFO L482 AbstractCegarLoop]: Abstraction has 13376 states and 47354 transitions. [2021-06-05 16:54:45,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:45,337 INFO L276 IsEmpty]: Start isEmpty. Operand 13376 states and 47354 transitions. [2021-06-05 16:54:45,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:54:45,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:45,355 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:45,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 16:54:45,555 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:45,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:45,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1040726762, now seen corresponding path program 76 times [2021-06-05 16:54:45,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:45,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552093773] [2021-06-05 16:54:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:45,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:45,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552093773] [2021-06-05 16:54:45,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552093773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:45,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342368666] [2021-06-05 16:54:45,611 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 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 16:54:45,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:54:45,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:45,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:54:45,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:45,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342368666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:45,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:45,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 16:54:45,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283672179] [2021-06-05 16:54:45,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:54:45,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:45,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:54:45,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:54:45,756 INFO L87 Difference]: Start difference. First operand 13376 states and 47354 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:48,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:48,216 INFO L93 Difference]: Finished difference Result 31957 states and 103754 transitions. [2021-06-05 16:54:48,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-06-05 16:54:48,217 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:54:48,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:48,276 INFO L225 Difference]: With dead ends: 31957 [2021-06-05 16:54:48,277 INFO L226 Difference]: Without dead ends: 31941 [2021-06-05 16:54:48,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7670 ImplicationChecksByTransitivity, 1709.9ms TimeCoverageRelationStatistics Valid=3631, Invalid=15551, Unknown=0, NotChecked=0, Total=19182 [2021-06-05 16:54:48,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31941 states. [2021-06-05 16:54:48,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31941 to 12804. [2021-06-05 16:54:48,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12804 states, 12803 states have (on average 3.5590096071233304) internal successors, (45566), 12803 states have internal predecessors, (45566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:48,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12804 states to 12804 states and 45566 transitions. [2021-06-05 16:54:48,720 INFO L78 Accepts]: Start accepts. Automaton has 12804 states and 45566 transitions. Word has length 36 [2021-06-05 16:54:48,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:48,720 INFO L482 AbstractCegarLoop]: Abstraction has 12804 states and 45566 transitions. [2021-06-05 16:54:48,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:48,720 INFO L276 IsEmpty]: Start isEmpty. Operand 12804 states and 45566 transitions. [2021-06-05 16:54:48,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:54:48,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:48,740 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:48,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 16:54:48,941 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:48,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:48,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1670020454, now seen corresponding path program 77 times [2021-06-05 16:54:48,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:48,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110733006] [2021-06-05 16:54:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:48,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:48,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110733006] [2021-06-05 16:54:48,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110733006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:48,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146044059] [2021-06-05 16:54:48,996 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 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 16:54:49,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 16:54:49,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:49,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:54:49,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:54:49,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146044059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:49,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:49,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 16:54:49,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265674819] [2021-06-05 16:54:49,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:54:49,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:49,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:54:49,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:54:49,133 INFO L87 Difference]: Start difference. First operand 12804 states and 45566 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:50,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:50,971 INFO L93 Difference]: Finished difference Result 29035 states and 95366 transitions. [2021-06-05 16:54:50,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 16:54:50,971 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:54:50,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:51,029 INFO L225 Difference]: With dead ends: 29035 [2021-06-05 16:54:51,030 INFO L226 Difference]: Without dead ends: 28951 [2021-06-05 16:54:51,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4298 ImplicationChecksByTransitivity, 1167.3ms TimeCoverageRelationStatistics Valid=2386, Invalid=8956, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 16:54:51,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28951 states. [2021-06-05 16:54:51,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28951 to 12660. [2021-06-05 16:54:51,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12660 states, 12659 states have (on average 3.5663164546962633) internal successors, (45146), 12659 states have internal predecessors, (45146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:51,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12660 states to 12660 states and 45146 transitions. [2021-06-05 16:54:51,416 INFO L78 Accepts]: Start accepts. Automaton has 12660 states and 45146 transitions. Word has length 36 [2021-06-05 16:54:51,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:51,416 INFO L482 AbstractCegarLoop]: Abstraction has 12660 states and 45146 transitions. [2021-06-05 16:54:51,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:51,416 INFO L276 IsEmpty]: Start isEmpty. Operand 12660 states and 45146 transitions. [2021-06-05 16:54:51,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:54:51,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:51,434 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:51,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 16:54:51,636 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:51,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:51,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1988479988, now seen corresponding path program 78 times [2021-06-05 16:54:51,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:51,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752274989] [2021-06-05 16:54:51,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:51,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:51,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752274989] [2021-06-05 16:54:51,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752274989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:51,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115481526] [2021-06-05 16:54:51,688 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 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 16:54:51,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 16:54:51,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:51,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:54:51,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:51,867 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 16:54:51,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:51,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:51,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:51,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-06-05 16:54:51,901 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-06-05 16:54:51,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 16:54:51,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:51,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:51,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:51,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 16:54:51,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:51,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:51,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:51,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-06-05 16:54:51,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:51,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:51,981 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 16:54:51,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-06-05 16:54:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:54:52,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115481526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:52,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:52,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-05 16:54:52,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048300608] [2021-06-05 16:54:52,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:54:52,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:52,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:54:52,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:54:52,090 INFO L87 Difference]: Start difference. First operand 12660 states and 45146 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:55,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:55,911 INFO L93 Difference]: Finished difference Result 27292 states and 89638 transitions. [2021-06-05 16:54:55,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-06-05 16:54:55,911 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:54:55,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:55,959 INFO L225 Difference]: With dead ends: 27292 [2021-06-05 16:54:55,959 INFO L226 Difference]: Without dead ends: 27101 [2021-06-05 16:54:55,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10096 ImplicationChecksByTransitivity, 2802.2ms TimeCoverageRelationStatistics Valid=3156, Invalid=22604, Unknown=0, NotChecked=0, Total=25760 [2021-06-05 16:54:55,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27101 states. [2021-06-05 16:54:56,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27101 to 12693. [2021-06-05 16:54:56,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12693 states, 12692 states have (on average 3.567601638827608) internal successors, (45280), 12692 states have internal predecessors, (45280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:56,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12693 states to 12693 states and 45280 transitions. [2021-06-05 16:54:56,322 INFO L78 Accepts]: Start accepts. Automaton has 12693 states and 45280 transitions. Word has length 36 [2021-06-05 16:54:56,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:56,322 INFO L482 AbstractCegarLoop]: Abstraction has 12693 states and 45280 transitions. [2021-06-05 16:54:56,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:56,322 INFO L276 IsEmpty]: Start isEmpty. Operand 12693 states and 45280 transitions. [2021-06-05 16:54:56,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:54:56,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:56,341 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:56,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 16:54:56,541 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:56,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:56,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1792794872, now seen corresponding path program 79 times [2021-06-05 16:54:56,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:56,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806166871] [2021-06-05 16:54:56,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:56,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:56,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806166871] [2021-06-05 16:54:56,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806166871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:56,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971559866] [2021-06-05 16:54:56,581 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 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 16:54:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:56,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:54:56,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:56,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971559866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:56,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:56,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 16:54:56,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244769138] [2021-06-05 16:54:56,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:54:56,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:56,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:54:56,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:54:56,782 INFO L87 Difference]: Start difference. First operand 12693 states and 45280 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:57,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:57,524 INFO L93 Difference]: Finished difference Result 30802 states and 102946 transitions. [2021-06-05 16:54:57,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:54:57,524 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:54:57,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:57,584 INFO L225 Difference]: With dead ends: 30802 [2021-06-05 16:54:57,585 INFO L226 Difference]: Without dead ends: 30802 [2021-06-05 16:54:57,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 420.9ms TimeCoverageRelationStatistics Valid=588, Invalid=1574, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:54:57,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30802 states. [2021-06-05 16:54:57,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30802 to 12697. [2021-06-05 16:54:57,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12697 states, 12696 states have (on average 3.5682104599873976) internal successors, (45302), 12696 states have internal predecessors, (45302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:57,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12697 states to 12697 states and 45302 transitions. [2021-06-05 16:54:57,990 INFO L78 Accepts]: Start accepts. Automaton has 12697 states and 45302 transitions. Word has length 36 [2021-06-05 16:54:57,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:57,990 INFO L482 AbstractCegarLoop]: Abstraction has 12697 states and 45302 transitions. [2021-06-05 16:54:57,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:57,990 INFO L276 IsEmpty]: Start isEmpty. Operand 12697 states and 45302 transitions. [2021-06-05 16:54:58,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:54:58,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:58,009 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:58,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 16:54:58,210 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:58,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:58,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1230140076, now seen corresponding path program 80 times [2021-06-05 16:54:58,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:58,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871590880] [2021-06-05 16:54:58,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:58,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:58,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871590880] [2021-06-05 16:54:58,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871590880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:58,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144223620] [2021-06-05 16:54:58,257 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 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 16:54:58,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:58,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:58,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:54:58,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:54:58,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144223620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:58,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:58,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:54:58,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513967279] [2021-06-05 16:54:58,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:54:58,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:58,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:54:58,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:54:58,410 INFO L87 Difference]: Start difference. First operand 12697 states and 45302 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:01,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:01,469 INFO L93 Difference]: Finished difference Result 33049 states and 107981 transitions. [2021-06-05 16:55:01,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-06-05 16:55:01,469 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:55:01,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:01,530 INFO L225 Difference]: With dead ends: 33049 [2021-06-05 16:55:01,530 INFO L226 Difference]: Without dead ends: 32977 [2021-06-05 16:55:01,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11512 ImplicationChecksByTransitivity, 2154.8ms TimeCoverageRelationStatistics Valid=4716, Invalid=23006, Unknown=0, NotChecked=0, Total=27722 [2021-06-05 16:55:01,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32977 states. [2021-06-05 16:55:01,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32977 to 12738. [2021-06-05 16:55:01,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12738 states, 12737 states have (on average 3.5727408337913165) internal successors, (45506), 12737 states have internal predecessors, (45506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:01,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12738 states to 12738 states and 45506 transitions. [2021-06-05 16:55:01,956 INFO L78 Accepts]: Start accepts. Automaton has 12738 states and 45506 transitions. Word has length 36 [2021-06-05 16:55:01,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:01,956 INFO L482 AbstractCegarLoop]: Abstraction has 12738 states and 45506 transitions. [2021-06-05 16:55:01,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 12738 states and 45506 transitions. [2021-06-05 16:55:01,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:01,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:01,976 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:02,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 16:55:02,177 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:02,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:02,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2017838672, now seen corresponding path program 81 times [2021-06-05 16:55:02,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:02,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087697066] [2021-06-05 16:55:02,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:02,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:02,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087697066] [2021-06-05 16:55:02,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087697066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:02,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282037165] [2021-06-05 16:55:02,229 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 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 16:55:02,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 16:55:02,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:02,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:55:02,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:02,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282037165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:02,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:02,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 16:55:02,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647166768] [2021-06-05 16:55:02,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:55:02,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:02,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:55:02,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:55:02,349 INFO L87 Difference]: Start difference. First operand 12738 states and 45506 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:03,702 INFO L93 Difference]: Finished difference Result 28529 states and 93962 transitions. [2021-06-05 16:55:03,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 16:55:03,702 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:55:03,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:03,756 INFO L225 Difference]: With dead ends: 28529 [2021-06-05 16:55:03,756 INFO L226 Difference]: Without dead ends: 28385 [2021-06-05 16:55:03,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2641 ImplicationChecksByTransitivity, 819.9ms TimeCoverageRelationStatistics Valid=1478, Invalid=6004, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 16:55:03,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28385 states. [2021-06-05 16:55:04,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28385 to 12796. [2021-06-05 16:55:04,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12796 states, 12795 states have (on average 3.569753810082063) internal successors, (45675), 12795 states have internal predecessors, (45675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:04,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12796 states to 12796 states and 45675 transitions. [2021-06-05 16:55:04,180 INFO L78 Accepts]: Start accepts. Automaton has 12796 states and 45675 transitions. Word has length 36 [2021-06-05 16:55:04,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:04,180 INFO L482 AbstractCegarLoop]: Abstraction has 12796 states and 45675 transitions. [2021-06-05 16:55:04,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:04,180 INFO L276 IsEmpty]: Start isEmpty. Operand 12796 states and 45675 transitions. [2021-06-05 16:55:04,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:04,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:04,199 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:04,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 16:55:04,400 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:04,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:04,400 INFO L82 PathProgramCache]: Analyzing trace with hash -545537740, now seen corresponding path program 82 times [2021-06-05 16:55:04,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:04,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245089696] [2021-06-05 16:55:04,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:04,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:04,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245089696] [2021-06-05 16:55:04,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245089696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:04,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916523110] [2021-06-05 16:55:04,453 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 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 16:55:04,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:04,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:04,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:55:04,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:04,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916523110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:04,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:04,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 16:55:04,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90121429] [2021-06-05 16:55:04,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:55:04,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:04,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:55:04,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:55:04,600 INFO L87 Difference]: Start difference. First operand 12796 states and 45675 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:06,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:06,668 INFO L93 Difference]: Finished difference Result 30495 states and 99403 transitions. [2021-06-05 16:55:06,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-05 16:55:06,668 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:55:06,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:06,730 INFO L225 Difference]: With dead ends: 30495 [2021-06-05 16:55:06,730 INFO L226 Difference]: Without dead ends: 30483 [2021-06-05 16:55:06,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5685 ImplicationChecksByTransitivity, 1312.6ms TimeCoverageRelationStatistics Valid=2727, Invalid=11315, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 16:55:06,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30483 states. [2021-06-05 16:55:07,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30483 to 11108. [2021-06-05 16:55:07,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11108 states, 11107 states have (on average 3.466822724408031) internal successors, (38506), 11107 states have internal predecessors, (38506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:07,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11108 states to 11108 states and 38506 transitions. [2021-06-05 16:55:07,114 INFO L78 Accepts]: Start accepts. Automaton has 11108 states and 38506 transitions. Word has length 36 [2021-06-05 16:55:07,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:07,114 INFO L482 AbstractCegarLoop]: Abstraction has 11108 states and 38506 transitions. [2021-06-05 16:55:07,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:07,114 INFO L276 IsEmpty]: Start isEmpty. Operand 11108 states and 38506 transitions. [2021-06-05 16:55:07,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:07,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:07,129 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:07,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:07,345 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:07,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:07,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1920078252, now seen corresponding path program 83 times [2021-06-05 16:55:07,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:07,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987521885] [2021-06-05 16:55:07,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:07,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:07,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987521885] [2021-06-05 16:55:07,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987521885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:07,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39735194] [2021-06-05 16:55:07,416 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 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 16:55:07,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 16:55:07,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:07,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:55:07,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:55:07,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39735194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:07,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:07,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 16:55:07,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176060362] [2021-06-05 16:55:07,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:55:07,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:07,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:55:07,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:55:07,590 INFO L87 Difference]: Start difference. First operand 11108 states and 38506 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:09,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:09,355 INFO L93 Difference]: Finished difference Result 23782 states and 78083 transitions. [2021-06-05 16:55:09,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 16:55:09,355 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:55:09,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:09,401 INFO L225 Difference]: With dead ends: 23782 [2021-06-05 16:55:09,401 INFO L226 Difference]: Without dead ends: 23782 [2021-06-05 16:55:09,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4543 ImplicationChecksByTransitivity, 1245.3ms TimeCoverageRelationStatistics Valid=2343, Invalid=8999, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 16:55:09,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23782 states. [2021-06-05 16:55:09,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23782 to 11414. [2021-06-05 16:55:09,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11414 states, 11413 states have (on average 3.453517918163498) internal successors, (39415), 11413 states have internal predecessors, (39415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:09,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11414 states to 11414 states and 39415 transitions. [2021-06-05 16:55:09,687 INFO L78 Accepts]: Start accepts. Automaton has 11414 states and 39415 transitions. Word has length 36 [2021-06-05 16:55:09,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:09,687 INFO L482 AbstractCegarLoop]: Abstraction has 11414 states and 39415 transitions. [2021-06-05 16:55:09,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:09,687 INFO L276 IsEmpty]: Start isEmpty. Operand 11414 states and 39415 transitions. [2021-06-05 16:55:09,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:09,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:09,703 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:09,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:09,903 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:09,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:09,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1278156332, now seen corresponding path program 84 times [2021-06-05 16:55:09,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:09,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079750194] [2021-06-05 16:55:09,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:09,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:09,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079750194] [2021-06-05 16:55:09,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079750194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:09,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935420010] [2021-06-05 16:55:09,964 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 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 16:55:09,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 16:55:09,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:09,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:55:09,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:10,137 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 16:55:10,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:10,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:10,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:10,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-06-05 16:55:10,173 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-06-05 16:55:10,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 16:55:10,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:10,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:10,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:10,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 16:55:10,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:55:10,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:55:10,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:55:10,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-06-05 16:55:10,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:10,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:10,253 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 16:55:10,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-06-05 16:55:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:55:10,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935420010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:10,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:10,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-05 16:55:10,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612677474] [2021-06-05 16:55:10,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:55:10,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:10,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:55:10,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:55:10,345 INFO L87 Difference]: Start difference. First operand 11414 states and 39415 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:15,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:15,349 INFO L93 Difference]: Finished difference Result 23675 states and 76434 transitions. [2021-06-05 16:55:15,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-06-05 16:55:15,349 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:55:15,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:15,388 INFO L225 Difference]: With dead ends: 23675 [2021-06-05 16:55:15,388 INFO L226 Difference]: Without dead ends: 23445 [2021-06-05 16:55:15,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12718 ImplicationChecksByTransitivity, 3596.6ms TimeCoverageRelationStatistics Valid=3502, Invalid=29078, Unknown=0, NotChecked=0, Total=32580 [2021-06-05 16:55:15,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23445 states. [2021-06-05 16:55:15,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23445 to 11648. [2021-06-05 16:55:15,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11648 states, 11647 states have (on average 3.4537649180046364) internal successors, (40226), 11647 states have internal predecessors, (40226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:15,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11648 states to 11648 states and 40226 transitions. [2021-06-05 16:55:15,669 INFO L78 Accepts]: Start accepts. Automaton has 11648 states and 40226 transitions. Word has length 36 [2021-06-05 16:55:15,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:15,669 INFO L482 AbstractCegarLoop]: Abstraction has 11648 states and 40226 transitions. [2021-06-05 16:55:15,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 11648 states and 40226 transitions. [2021-06-05 16:55:15,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:15,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:15,687 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:15,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:15,903 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:15,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:15,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1851612882, now seen corresponding path program 85 times [2021-06-05 16:55:15,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:15,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618399142] [2021-06-05 16:55:15,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:15,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:15,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618399142] [2021-06-05 16:55:15,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618399142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:15,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729342482] [2021-06-05 16:55:15,959 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 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 16:55:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:15,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:55:15,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:55:16,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729342482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:16,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:16,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:55:16,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878231025] [2021-06-05 16:55:16,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:55:16,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:16,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:55:16,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:55:16,106 INFO L87 Difference]: Start difference. First operand 11648 states and 40226 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:17,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:17,377 INFO L93 Difference]: Finished difference Result 21100 states and 70299 transitions. [2021-06-05 16:55:17,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 16:55:17,377 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:55:17,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:17,420 INFO L225 Difference]: With dead ends: 21100 [2021-06-05 16:55:17,420 INFO L226 Difference]: Without dead ends: 21088 [2021-06-05 16:55:17,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 788.1ms TimeCoverageRelationStatistics Valid=1148, Invalid=4858, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 16:55:17,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21088 states. [2021-06-05 16:55:17,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21088 to 11913. [2021-06-05 16:55:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11913 states, 11912 states have (on average 3.4548354600402953) internal successors, (41154), 11912 states have internal predecessors, (41154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:17,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11913 states to 11913 states and 41154 transitions. [2021-06-05 16:55:17,794 INFO L78 Accepts]: Start accepts. Automaton has 11913 states and 41154 transitions. Word has length 36 [2021-06-05 16:55:17,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:17,794 INFO L482 AbstractCegarLoop]: Abstraction has 11913 states and 41154 transitions. [2021-06-05 16:55:17,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:17,794 INFO L276 IsEmpty]: Start isEmpty. Operand 11913 states and 41154 transitions. [2021-06-05 16:55:17,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:17,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:17,810 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:18,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:18,010 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:18,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:18,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1819802944, now seen corresponding path program 25 times [2021-06-05 16:55:18,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:18,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530988806] [2021-06-05 16:55:18,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:55:18,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:18,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530988806] [2021-06-05 16:55:18,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530988806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:18,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130379668] [2021-06-05 16:55:18,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:18,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:55:18,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:18,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130379668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:18,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:18,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 16:55:18,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297936202] [2021-06-05 16:55:18,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:55:18,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:18,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:55:18,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:55:18,329 INFO L87 Difference]: Start difference. First operand 11913 states and 41154 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:19,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:19,509 INFO L93 Difference]: Finished difference Result 29397 states and 97752 transitions. [2021-06-05 16:55:19,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:55:19,509 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:55:19,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:19,569 INFO L225 Difference]: With dead ends: 29397 [2021-06-05 16:55:19,569 INFO L226 Difference]: Without dead ends: 29397 [2021-06-05 16:55:19,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 709.7ms TimeCoverageRelationStatistics Valid=957, Invalid=2583, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:55:19,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29397 states. [2021-06-05 16:55:19,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29397 to 12618. [2021-06-05 16:55:19,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12618 states, 12617 states have (on average 3.513672029801062) internal successors, (44332), 12617 states have internal predecessors, (44332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:19,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12618 states to 12618 states and 44332 transitions. [2021-06-05 16:55:19,928 INFO L78 Accepts]: Start accepts. Automaton has 12618 states and 44332 transitions. Word has length 36 [2021-06-05 16:55:19,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:19,928 INFO L482 AbstractCegarLoop]: Abstraction has 12618 states and 44332 transitions. [2021-06-05 16:55:19,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:19,928 INFO L276 IsEmpty]: Start isEmpty. Operand 12618 states and 44332 transitions. [2021-06-05 16:55:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:19,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:19,945 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:20,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 16:55:20,146 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:20,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:20,146 INFO L82 PathProgramCache]: Analyzing trace with hash 512328654, now seen corresponding path program 26 times [2021-06-05 16:55:20,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:20,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369177229] [2021-06-05 16:55:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:55:20,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:20,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369177229] [2021-06-05 16:55:20,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369177229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:20,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798229878] [2021-06-05 16:55:20,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:20,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:20,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:20,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:55:20,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:20,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798229878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:20,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:20,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 18 [2021-06-05 16:55:20,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916001419] [2021-06-05 16:55:20,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:55:20,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:20,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:55:20,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:55:20,345 INFO L87 Difference]: Start difference. First operand 12618 states and 44332 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 16:55:21,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:21,284 INFO L93 Difference]: Finished difference Result 27598 states and 91849 transitions. [2021-06-05 16:55:21,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:55:21,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 36 [2021-06-05 16:55:21,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:21,334 INFO L225 Difference]: With dead ends: 27598 [2021-06-05 16:55:21,334 INFO L226 Difference]: Without dead ends: 27598 [2021-06-05 16:55:21,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 554.8ms TimeCoverageRelationStatistics Valid=833, Invalid=2359, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:55:21,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27598 states. [2021-06-05 16:55:21,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27598 to 12630. [2021-06-05 16:55:21,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12630 states, 12629 states have (on average 3.5136590387204056) internal successors, (44374), 12629 states have internal predecessors, (44374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:21,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12630 states to 12630 states and 44374 transitions. [2021-06-05 16:55:21,724 INFO L78 Accepts]: Start accepts. Automaton has 12630 states and 44374 transitions. Word has length 36 [2021-06-05 16:55:21,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:21,724 INFO L482 AbstractCegarLoop]: Abstraction has 12630 states and 44374 transitions. [2021-06-05 16:55:21,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 16:55:21,724 INFO L276 IsEmpty]: Start isEmpty. Operand 12630 states and 44374 transitions. [2021-06-05 16:55:21,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:21,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:21,741 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:21,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 16:55:21,941 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:21,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:21,942 INFO L82 PathProgramCache]: Analyzing trace with hash -2051604804, now seen corresponding path program 27 times [2021-06-05 16:55:21,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:21,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873126108] [2021-06-05 16:55:21,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:55:21,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:21,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873126108] [2021-06-05 16:55:21,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873126108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:21,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362756544] [2021-06-05 16:55:21,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:55:22,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 16:55:22,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:22,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:55:22,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:22,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362756544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:22,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:22,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 18 [2021-06-05 16:55:22,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964064980] [2021-06-05 16:55:22,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:55:22,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:22,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:55:22,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:55:22,142 INFO L87 Difference]: Start difference. First operand 12630 states and 44374 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 16:55:23,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:23,084 INFO L93 Difference]: Finished difference Result 27112 states and 90425 transitions. [2021-06-05 16:55:23,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:55:23,084 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 36 [2021-06-05 16:55:23,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:23,135 INFO L225 Difference]: With dead ends: 27112 [2021-06-05 16:55:23,135 INFO L226 Difference]: Without dead ends: 27108 [2021-06-05 16:55:23,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 484.1ms TimeCoverageRelationStatistics Valid=708, Invalid=2048, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:55:23,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27108 states. [2021-06-05 16:55:23,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27108 to 12826. [2021-06-05 16:55:23,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12826 states, 12825 states have (on average 3.504093567251462) internal successors, (44940), 12825 states have internal predecessors, (44940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:23,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12826 states to 12826 states and 44940 transitions. [2021-06-05 16:55:23,479 INFO L78 Accepts]: Start accepts. Automaton has 12826 states and 44940 transitions. Word has length 36 [2021-06-05 16:55:23,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:23,479 INFO L482 AbstractCegarLoop]: Abstraction has 12826 states and 44940 transitions. [2021-06-05 16:55:23,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 16:55:23,479 INFO L276 IsEmpty]: Start isEmpty. Operand 12826 states and 44940 transitions. [2021-06-05 16:55:23,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:23,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:23,498 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:23,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 16:55:23,699 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:23,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:23,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1246962008, now seen corresponding path program 28 times [2021-06-05 16:55:23,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:23,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432003142] [2021-06-05 16:55:23,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:23,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:23,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:23,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432003142] [2021-06-05 16:55:23,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432003142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:23,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991228891] [2021-06-05 16:55:23,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:55:23,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:23,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:23,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:55:23,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:23,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991228891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:23,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:23,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 18 [2021-06-05 16:55:23,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773279391] [2021-06-05 16:55:23,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:55:23,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:23,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:55:23,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:55:23,892 INFO L87 Difference]: Start difference. First operand 12826 states and 44940 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 16:55:24,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:24,890 INFO L93 Difference]: Finished difference Result 26778 states and 89284 transitions. [2021-06-05 16:55:24,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 16:55:24,891 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 36 [2021-06-05 16:55:24,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:24,935 INFO L225 Difference]: With dead ends: 26778 [2021-06-05 16:55:24,935 INFO L226 Difference]: Without dead ends: 26778 [2021-06-05 16:55:24,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 581.1ms TimeCoverageRelationStatistics Valid=956, Invalid=2704, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:55:24,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26778 states. [2021-06-05 16:55:25,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26778 to 12913. [2021-06-05 16:55:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12913 states, 12912 states have (on average 3.5164188351920695) internal successors, (45404), 12912 states have internal predecessors, (45404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:25,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12913 states to 12913 states and 45404 transitions. [2021-06-05 16:55:25,308 INFO L78 Accepts]: Start accepts. Automaton has 12913 states and 45404 transitions. Word has length 36 [2021-06-05 16:55:25,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:25,308 INFO L482 AbstractCegarLoop]: Abstraction has 12913 states and 45404 transitions. [2021-06-05 16:55:25,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 16:55:25,308 INFO L276 IsEmpty]: Start isEmpty. Operand 12913 states and 45404 transitions. [2021-06-05 16:55:25,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:25,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:25,327 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:25,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 16:55:25,541 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:25,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:25,541 INFO L82 PathProgramCache]: Analyzing trace with hash 680135048, now seen corresponding path program 29 times [2021-06-05 16:55:25,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:25,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810216929] [2021-06-05 16:55:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:25,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:25,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810216929] [2021-06-05 16:55:25,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810216929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:25,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300042108] [2021-06-05 16:55:25,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:25,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 16:55:25,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:25,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:55:25,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:55:25,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300042108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:25,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:25,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 16:55:25,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940087327] [2021-06-05 16:55:25,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:55:25,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:25,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:55:25,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:55:25,803 INFO L87 Difference]: Start difference. First operand 12913 states and 45404 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:30,142 INFO L93 Difference]: Finished difference Result 28407 states and 94171 transitions. [2021-06-05 16:55:30,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-06-05 16:55:30,145 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:55:30,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:30,197 INFO L225 Difference]: With dead ends: 28407 [2021-06-05 16:55:30,198 INFO L226 Difference]: Without dead ends: 28387 [2021-06-05 16:55:30,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18300 ImplicationChecksByTransitivity, 3273.2ms TimeCoverageRelationStatistics Valid=7298, Invalid=36174, Unknown=0, NotChecked=0, Total=43472 [2021-06-05 16:55:30,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28387 states. [2021-06-05 16:55:30,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28387 to 13021. [2021-06-05 16:55:30,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13021 states, 13020 states have (on average 3.526804915514593) internal successors, (45919), 13020 states have internal predecessors, (45919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:30,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13021 states to 13021 states and 45919 transitions. [2021-06-05 16:55:30,550 INFO L78 Accepts]: Start accepts. Automaton has 13021 states and 45919 transitions. Word has length 36 [2021-06-05 16:55:30,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:30,550 INFO L482 AbstractCegarLoop]: Abstraction has 13021 states and 45919 transitions. [2021-06-05 16:55:30,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:30,550 INFO L276 IsEmpty]: Start isEmpty. Operand 13021 states and 45919 transitions. [2021-06-05 16:55:30,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:30,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:30,568 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:30,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:30,768 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:30,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:30,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1847708024, now seen corresponding path program 30 times [2021-06-05 16:55:30,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:30,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145885792] [2021-06-05 16:55:30,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:30,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:30,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145885792] [2021-06-05 16:55:30,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145885792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:30,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387436567] [2021-06-05 16:55:30,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:30,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 16:55:30,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:30,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:55:30,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:30,999 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 16:55:31,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:31,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:31,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:31,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-06-05 16:55:31,038 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-06-05 16:55:31,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 16:55:31,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:31,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:31,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:31,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 16:55:31,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:55:31,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:55:31,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:55:31,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-06-05 16:55:31,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:31,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:31,116 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 16:55:31,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-06-05 16:55:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:55:31,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387436567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:31,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:31,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-05 16:55:31,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102966181] [2021-06-05 16:55:31,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:55:31,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:31,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:55:31,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:55:31,205 INFO L87 Difference]: Start difference. First operand 13021 states and 45919 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:35,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:35,297 INFO L93 Difference]: Finished difference Result 25162 states and 83066 transitions. [2021-06-05 16:55:35,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-06-05 16:55:35,297 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:55:35,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:35,342 INFO L225 Difference]: With dead ends: 25162 [2021-06-05 16:55:35,342 INFO L226 Difference]: Without dead ends: 24983 [2021-06-05 16:55:35,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13764 ImplicationChecksByTransitivity, 3206.3ms TimeCoverageRelationStatistics Valid=4792, Invalid=29248, Unknown=0, NotChecked=0, Total=34040 [2021-06-05 16:55:35,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24983 states. [2021-06-05 16:55:35,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24983 to 13428. [2021-06-05 16:55:35,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13428 states, 13427 states have (on average 3.5044313696283607) internal successors, (47054), 13427 states have internal predecessors, (47054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13428 states to 13428 states and 47054 transitions. [2021-06-05 16:55:35,682 INFO L78 Accepts]: Start accepts. Automaton has 13428 states and 47054 transitions. Word has length 36 [2021-06-05 16:55:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:35,682 INFO L482 AbstractCegarLoop]: Abstraction has 13428 states and 47054 transitions. [2021-06-05 16:55:35,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 13428 states and 47054 transitions. [2021-06-05 16:55:35,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:35,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:35,701 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:35,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 16:55:35,902 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:35,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:35,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1284231232, now seen corresponding path program 86 times [2021-06-05 16:55:35,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:35,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783093470] [2021-06-05 16:55:35,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:35,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:35,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783093470] [2021-06-05 16:55:35,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783093470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:35,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278947265] [2021-06-05 16:55:35,955 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 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 16:55:35,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:35,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:35,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:55:35,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:55:36,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278947265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:36,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:36,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 16:55:36,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549725169] [2021-06-05 16:55:36,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:55:36,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:36,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:55:36,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:55:36,105 INFO L87 Difference]: Start difference. First operand 13428 states and 47054 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:36,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:36,915 INFO L93 Difference]: Finished difference Result 24409 states and 81988 transitions. [2021-06-05 16:55:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:55:36,916 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:55:36,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:36,959 INFO L225 Difference]: With dead ends: 24409 [2021-06-05 16:55:36,959 INFO L226 Difference]: Without dead ends: 24409 [2021-06-05 16:55:36,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 427.0ms TimeCoverageRelationStatistics Valid=614, Invalid=1836, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:55:36,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24409 states. [2021-06-05 16:55:37,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24409 to 13273. [2021-06-05 16:55:37,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13273 states, 13272 states have (on average 3.4954792043399636) internal successors, (46392), 13272 states have internal predecessors, (46392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:37,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13273 states to 13273 states and 46392 transitions. [2021-06-05 16:55:37,300 INFO L78 Accepts]: Start accepts. Automaton has 13273 states and 46392 transitions. Word has length 36 [2021-06-05 16:55:37,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:37,300 INFO L482 AbstractCegarLoop]: Abstraction has 13273 states and 46392 transitions. [2021-06-05 16:55:37,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:37,301 INFO L276 IsEmpty]: Start isEmpty. Operand 13273 states and 46392 transitions. [2021-06-05 16:55:37,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:37,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:37,321 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:37,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:37,521 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:37,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:37,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2050547776, now seen corresponding path program 87 times [2021-06-05 16:55:37,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:37,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363212533] [2021-06-05 16:55:37,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:37,567 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:37,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:37,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363212533] [2021-06-05 16:55:37,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363212533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:37,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871595720] [2021-06-05 16:55:37,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:55:37,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:55:37,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:37,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:55:37,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:55:37,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871595720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:37,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:37,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 16:55:37,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025800446] [2021-06-05 16:55:37,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:55:37,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:37,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:55:37,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:55:37,697 INFO L87 Difference]: Start difference. First operand 13273 states and 46392 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:38,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:38,223 INFO L93 Difference]: Finished difference Result 23775 states and 80054 transitions. [2021-06-05 16:55:38,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:55:38,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:55:38,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:38,264 INFO L225 Difference]: With dead ends: 23775 [2021-06-05 16:55:38,264 INFO L226 Difference]: Without dead ends: 23775 [2021-06-05 16:55:38,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 260.2ms TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:55:38,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23775 states. [2021-06-05 16:55:38,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23775 to 13214. [2021-06-05 16:55:38,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13214 states, 13213 states have (on average 3.4921668054189055) internal successors, (46142), 13213 states have internal predecessors, (46142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:38,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13214 states to 13214 states and 46142 transitions. [2021-06-05 16:55:38,613 INFO L78 Accepts]: Start accepts. Automaton has 13214 states and 46142 transitions. Word has length 36 [2021-06-05 16:55:38,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:38,613 INFO L482 AbstractCegarLoop]: Abstraction has 13214 states and 46142 transitions. [2021-06-05 16:55:38,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:38,613 INFO L276 IsEmpty]: Start isEmpty. Operand 13214 states and 46142 transitions. [2021-06-05 16:55:38,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:38,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:38,634 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:38,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 16:55:38,839 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:38,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:38,840 INFO L82 PathProgramCache]: Analyzing trace with hash 281583822, now seen corresponding path program 88 times [2021-06-05 16:55:38,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:38,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758525637] [2021-06-05 16:55:38,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:38,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:38,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758525637] [2021-06-05 16:55:38,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758525637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:38,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222869386] [2021-06-05 16:55:38,888 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 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 16:55:38,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:38,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:38,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:55:38,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:55:39,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222869386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:39,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:39,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-06-05 16:55:39,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929901495] [2021-06-05 16:55:39,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:55:39,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:39,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:55:39,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:55:39,014 INFO L87 Difference]: Start difference. First operand 13214 states and 46142 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 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 16:55:39,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:39,465 INFO L93 Difference]: Finished difference Result 23327 states and 78114 transitions. [2021-06-05 16:55:39,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:55:39,465 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 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 36 [2021-06-05 16:55:39,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:39,509 INFO L225 Difference]: With dead ends: 23327 [2021-06-05 16:55:39,510 INFO L226 Difference]: Without dead ends: 23327 [2021-06-05 16:55:39,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=312, Invalid=878, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:55:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23327 states. [2021-06-05 16:55:39,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23327 to 13240. [2021-06-05 16:55:39,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13240 states, 13239 states have (on average 3.4912757761160207) internal successors, (46221), 13239 states have internal predecessors, (46221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:39,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13240 states to 13240 states and 46221 transitions. [2021-06-05 16:55:39,842 INFO L78 Accepts]: Start accepts. Automaton has 13240 states and 46221 transitions. Word has length 36 [2021-06-05 16:55:39,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:39,842 INFO L482 AbstractCegarLoop]: Abstraction has 13240 states and 46221 transitions. [2021-06-05 16:55:39,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 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 16:55:39,843 INFO L276 IsEmpty]: Start isEmpty. Operand 13240 states and 46221 transitions. [2021-06-05 16:55:39,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:39,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:39,865 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:40,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-06-05 16:55:40,073 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:40,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:40,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2012617660, now seen corresponding path program 89 times [2021-06-05 16:55:40,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:40,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639569300] [2021-06-05 16:55:40,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:40,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:40,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:40,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639569300] [2021-06-05 16:55:40,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639569300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:40,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107597801] [2021-06-05 16:55:40,120 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 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 16:55:40,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 16:55:40,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:40,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:55:40,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:40,271 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:55:40,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107597801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:40,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:40,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:55:40,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352592805] [2021-06-05 16:55:40,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:55:40,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:40,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:55:40,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:55:40,272 INFO L87 Difference]: Start difference. First operand 13240 states and 46221 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:41,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:41,796 INFO L93 Difference]: Finished difference Result 26376 states and 86731 transitions. [2021-06-05 16:55:41,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 16:55:41,796 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:55:41,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:41,847 INFO L225 Difference]: With dead ends: 26376 [2021-06-05 16:55:41,847 INFO L226 Difference]: Without dead ends: 26364 [2021-06-05 16:55:41,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2864 ImplicationChecksByTransitivity, 916.9ms TimeCoverageRelationStatistics Valid=1623, Invalid=6387, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 16:55:41,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26364 states. [2021-06-05 16:55:42,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26364 to 13310. [2021-06-05 16:55:42,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13310 states, 13309 states have (on average 3.4776467052370577) internal successors, (46284), 13309 states have internal predecessors, (46284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:42,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13310 states to 13310 states and 46284 transitions. [2021-06-05 16:55:42,192 INFO L78 Accepts]: Start accepts. Automaton has 13310 states and 46284 transitions. Word has length 36 [2021-06-05 16:55:42,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:42,192 INFO L482 AbstractCegarLoop]: Abstraction has 13310 states and 46284 transitions. [2021-06-05 16:55:42,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:42,192 INFO L276 IsEmpty]: Start isEmpty. Operand 13310 states and 46284 transitions. [2021-06-05 16:55:42,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:42,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:42,211 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:42,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:42,411 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:42,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:42,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1239534524, now seen corresponding path program 90 times [2021-06-05 16:55:42,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:42,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313283078] [2021-06-05 16:55:42,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:42,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:42,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313283078] [2021-06-05 16:55:42,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313283078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:42,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103304425] [2021-06-05 16:55:42,459 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 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 16:55:42,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:55:42,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:42,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:55:42,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:55:42,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103304425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:42,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:42,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 16:55:42,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366252926] [2021-06-05 16:55:42,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:55:42,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:42,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:55:42,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:55:42,563 INFO L87 Difference]: Start difference. First operand 13310 states and 46284 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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 16:55:43,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:43,375 INFO L93 Difference]: Finished difference Result 26781 states and 88963 transitions. [2021-06-05 16:55:43,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:55:43,375 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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 36 [2021-06-05 16:55:43,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:43,431 INFO L225 Difference]: With dead ends: 26781 [2021-06-05 16:55:43,431 INFO L226 Difference]: Without dead ends: 26737 [2021-06-05 16:55:43,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 475.4ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:55:43,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26737 states. [2021-06-05 16:55:43,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26737 to 13708. [2021-06-05 16:55:43,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13708 states, 13707 states have (on average 3.4510104326256656) internal successors, (47303), 13707 states have internal predecessors, (47303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:43,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13708 states to 13708 states and 47303 transitions. [2021-06-05 16:55:43,804 INFO L78 Accepts]: Start accepts. Automaton has 13708 states and 47303 transitions. Word has length 36 [2021-06-05 16:55:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:43,804 INFO L482 AbstractCegarLoop]: Abstraction has 13708 states and 47303 transitions. [2021-06-05 16:55:43,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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 16:55:43,805 INFO L276 IsEmpty]: Start isEmpty. Operand 13708 states and 47303 transitions. [2021-06-05 16:55:43,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:43,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:43,825 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:44,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:44,025 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:44,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:44,026 INFO L82 PathProgramCache]: Analyzing trace with hash 790366380, now seen corresponding path program 91 times [2021-06-05 16:55:44,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:44,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651559663] [2021-06-05 16:55:44,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:44,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:44,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651559663] [2021-06-05 16:55:44,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651559663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:44,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964700060] [2021-06-05 16:55:44,079 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 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 16:55:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:44,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:55:44,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:55:44,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964700060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:44,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:44,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 16:55:44,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376476174] [2021-06-05 16:55:44,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:55:44,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:44,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:55:44,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:55:44,198 INFO L87 Difference]: Start difference. First operand 13708 states and 47303 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 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 16:55:44,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:44,852 INFO L93 Difference]: Finished difference Result 26715 states and 87686 transitions. [2021-06-05 16:55:44,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:55:44,853 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 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 36 [2021-06-05 16:55:44,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:44,901 INFO L225 Difference]: With dead ends: 26715 [2021-06-05 16:55:44,901 INFO L226 Difference]: Without dead ends: 26715 [2021-06-05 16:55:44,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 377.3ms TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:55:44,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26715 states. [2021-06-05 16:55:45,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26715 to 14801. [2021-06-05 16:55:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14801 states, 14800 states have (on average 3.4525675675675678) internal successors, (51098), 14800 states have internal predecessors, (51098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:45,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14801 states to 14801 states and 51098 transitions. [2021-06-05 16:55:45,302 INFO L78 Accepts]: Start accepts. Automaton has 14801 states and 51098 transitions. Word has length 36 [2021-06-05 16:55:45,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:45,302 INFO L482 AbstractCegarLoop]: Abstraction has 14801 states and 51098 transitions. [2021-06-05 16:55:45,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 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 16:55:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand 14801 states and 51098 transitions. [2021-06-05 16:55:45,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:45,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:45,322 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:45,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 16:55:45,523 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:45,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:45,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2078452856, now seen corresponding path program 92 times [2021-06-05 16:55:45,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:45,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141126107] [2021-06-05 16:55:45,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:45,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:45,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141126107] [2021-06-05 16:55:45,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141126107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:45,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192431200] [2021-06-05 16:55:45,579 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 16:55:45,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:45,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:45,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:55:45,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:55:45,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192431200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:45,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:45,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 16:55:45,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062946587] [2021-06-05 16:55:45,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:55:45,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:45,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:55:45,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:55:45,682 INFO L87 Difference]: Start difference. First operand 14801 states and 51098 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 16:55:46,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:46,667 INFO L93 Difference]: Finished difference Result 26862 states and 89241 transitions. [2021-06-05 16:55:46,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:55:46,667 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 36 [2021-06-05 16:55:46,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:46,719 INFO L225 Difference]: With dead ends: 26862 [2021-06-05 16:55:46,719 INFO L226 Difference]: Without dead ends: 26794 [2021-06-05 16:55:46,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 564.7ms TimeCoverageRelationStatistics Valid=916, Invalid=3640, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:55:46,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26794 states. [2021-06-05 16:55:47,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26794 to 14135. [2021-06-05 16:55:47,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14135 states, 14134 states have (on average 3.475944530918353) internal successors, (49129), 14134 states have internal predecessors, (49129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:47,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14135 states to 14135 states and 49129 transitions. [2021-06-05 16:55:47,072 INFO L78 Accepts]: Start accepts. Automaton has 14135 states and 49129 transitions. Word has length 36 [2021-06-05 16:55:47,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:47,072 INFO L482 AbstractCegarLoop]: Abstraction has 14135 states and 49129 transitions. [2021-06-05 16:55:47,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 16:55:47,073 INFO L276 IsEmpty]: Start isEmpty. Operand 14135 states and 49129 transitions. [2021-06-05 16:55:47,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:47,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:47,092 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:47,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:47,293 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:47,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:47,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1434655568, now seen corresponding path program 93 times [2021-06-05 16:55:47,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:47,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789261759] [2021-06-05 16:55:47,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:47,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:47,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789261759] [2021-06-05 16:55:47,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789261759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:47,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917959153] [2021-06-05 16:55:47,356 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 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 16:55:47,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:55:47,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:47,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:55:47,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:47,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917959153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:47,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:47,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 16:55:47,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987336290] [2021-06-05 16:55:47,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:55:47,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:47,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:55:47,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:55:47,473 INFO L87 Difference]: Start difference. First operand 14135 states and 49129 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 16:55:48,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:48,361 INFO L93 Difference]: Finished difference Result 25932 states and 85483 transitions. [2021-06-05 16:55:48,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 16:55:48,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 36 [2021-06-05 16:55:48,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:48,480 INFO L225 Difference]: With dead ends: 25932 [2021-06-05 16:55:48,480 INFO L226 Difference]: Without dead ends: 25932 [2021-06-05 16:55:48,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 507.4ms TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:55:48,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25932 states. [2021-06-05 16:55:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25932 to 14667. [2021-06-05 16:55:48,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14667 states, 14666 states have (on average 3.455407063957453) internal successors, (50677), 14666 states have internal predecessors, (50677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:48,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14667 states to 14667 states and 50677 transitions. [2021-06-05 16:55:48,805 INFO L78 Accepts]: Start accepts. Automaton has 14667 states and 50677 transitions. Word has length 36 [2021-06-05 16:55:48,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:48,806 INFO L482 AbstractCegarLoop]: Abstraction has 14667 states and 50677 transitions. [2021-06-05 16:55:48,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 16:55:48,806 INFO L276 IsEmpty]: Start isEmpty. Operand 14667 states and 50677 transitions. [2021-06-05 16:55:48,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:48,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:48,828 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:49,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 16:55:49,041 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:49,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:49,041 INFO L82 PathProgramCache]: Analyzing trace with hash 296378270, now seen corresponding path program 94 times [2021-06-05 16:55:49,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:49,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931061818] [2021-06-05 16:55:49,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:49,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:49,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931061818] [2021-06-05 16:55:49,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931061818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:49,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138155266] [2021-06-05 16:55:49,099 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 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 16:55:49,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:49,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:49,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:55:49,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:49,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138155266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:49,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:49,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 16:55:49,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716476236] [2021-06-05 16:55:49,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:55:49,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:49,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:55:49,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:55:49,214 INFO L87 Difference]: Start difference. First operand 14667 states and 50677 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:50,867 INFO L93 Difference]: Finished difference Result 27978 states and 91670 transitions. [2021-06-05 16:55:50,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-06-05 16:55:50,867 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:55:50,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:50,915 INFO L225 Difference]: With dead ends: 27978 [2021-06-05 16:55:50,916 INFO L226 Difference]: Without dead ends: 27978 [2021-06-05 16:55:50,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5435 ImplicationChecksByTransitivity, 1085.1ms TimeCoverageRelationStatistics Valid=2370, Invalid=10740, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 16:55:50,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27978 states. [2021-06-05 16:55:51,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27978 to 13839. [2021-06-05 16:55:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13839 states, 13838 states have (on average 3.4976875270992918) internal successors, (48401), 13838 states have internal predecessors, (48401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:51,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13839 states to 13839 states and 48401 transitions. [2021-06-05 16:55:51,282 INFO L78 Accepts]: Start accepts. Automaton has 13839 states and 48401 transitions. Word has length 36 [2021-06-05 16:55:51,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:51,282 INFO L482 AbstractCegarLoop]: Abstraction has 13839 states and 48401 transitions. [2021-06-05 16:55:51,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:51,282 INFO L276 IsEmpty]: Start isEmpty. Operand 13839 states and 48401 transitions. [2021-06-05 16:55:51,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:51,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:51,303 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:51,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 16:55:51,503 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:51,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:51,503 INFO L82 PathProgramCache]: Analyzing trace with hash -384155512, now seen corresponding path program 95 times [2021-06-05 16:55:51,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:51,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127510596] [2021-06-05 16:55:51,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:51,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:51,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127510596] [2021-06-05 16:55:51,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127510596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:51,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280790581] [2021-06-05 16:55:51,562 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 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 16:55:51,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:55:51,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:51,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:55:51,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:51,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280790581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:51,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:51,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 16:55:51,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665662159] [2021-06-05 16:55:51,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:55:51,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:51,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:55:51,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:55:51,668 INFO L87 Difference]: Start difference. First operand 13839 states and 48401 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 16:55:52,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:52,859 INFO L93 Difference]: Finished difference Result 26069 states and 86821 transitions. [2021-06-05 16:55:52,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 16:55:52,859 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 36 [2021-06-05 16:55:52,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:52,905 INFO L225 Difference]: With dead ends: 26069 [2021-06-05 16:55:52,905 INFO L226 Difference]: Without dead ends: 25977 [2021-06-05 16:55:52,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 731.0ms TimeCoverageRelationStatistics Valid=1207, Invalid=5435, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 16:55:52,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25977 states. [2021-06-05 16:55:53,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25977 to 14407. [2021-06-05 16:55:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14407 states, 14406 states have (on average 3.470637234485631) internal successors, (49998), 14406 states have internal predecessors, (49998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:53,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14407 states to 14407 states and 49998 transitions. [2021-06-05 16:55:53,242 INFO L78 Accepts]: Start accepts. Automaton has 14407 states and 49998 transitions. Word has length 36 [2021-06-05 16:55:53,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:53,242 INFO L482 AbstractCegarLoop]: Abstraction has 14407 states and 49998 transitions. [2021-06-05 16:55:53,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 16:55:53,242 INFO L276 IsEmpty]: Start isEmpty. Operand 14407 states and 49998 transitions. [2021-06-05 16:55:53,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:53,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:53,261 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:53,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 16:55:53,469 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:53,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:53,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1269898876, now seen corresponding path program 96 times [2021-06-05 16:55:53,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:53,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033709468] [2021-06-05 16:55:53,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:53,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:53,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033709468] [2021-06-05 16:55:53,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033709468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:53,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668872417] [2021-06-05 16:55:53,522 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 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 16:55:53,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:55:53,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:53,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:55:53,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:53,629 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 16:55:53,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:53,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:53,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:53,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 16:55:53,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:55:53,683 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 20 treesize of output 22 [2021-06-05 16:55:53,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:53,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:53,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:53,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 16:55:53,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:55:53,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:55:53,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:55:53,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2021-06-05 16:55:53,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:53,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:53,733 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 16:55:53,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:38 [2021-06-05 16:55:53,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:55:53,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:55:53,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 30 treesize of output 33 [2021-06-05 16:55:53,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:53,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:53,778 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 16:55:53,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:34 [2021-06-05 16:55:53,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:55:53,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:55:53,838 INFO L354 Elim1Store]: treesize reduction 48, result has 25.0 percent of original size [2021-06-05 16:55:53,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 16:55:53,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:53,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:53,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:55:53,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:46 [2021-06-05 16:55:53,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:55:53,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:55:53,935 INFO L354 Elim1Store]: treesize reduction 88, result has 19.3 percent of original size [2021-06-05 16:55:53,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 37 treesize of output 48 [2021-06-05 16:55:53,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:53,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:53,959 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 16:55:53,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:58 [2021-06-05 16:55:54,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:55:54,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:55:54,089 INFO L354 Elim1Store]: treesize reduction 136, result has 16.0 percent of original size [2021-06-05 16:55:54,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 58 [2021-06-05 16:55:54,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:54,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:54,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:55:54,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:70 [2021-06-05 16:55:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:54,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668872417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:54,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:54,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-05 16:55:54,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213512476] [2021-06-05 16:55:54,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:55:54,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:54,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:55:54,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:55:54,264 INFO L87 Difference]: Start difference. First operand 14407 states and 49998 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:57,014 INFO L93 Difference]: Finished difference Result 19437 states and 64480 transitions. [2021-06-05 16:55:57,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 16:55:57,015 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:55:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:57,043 INFO L225 Difference]: With dead ends: 19437 [2021-06-05 16:55:57,044 INFO L226 Difference]: Without dead ends: 19021 [2021-06-05 16:55:57,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 1719.5ms TimeCoverageRelationStatistics Valid=651, Invalid=5829, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 16:55:57,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19021 states. [2021-06-05 16:55:57,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19021 to 15957. [2021-06-05 16:55:57,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15957 states, 15956 states have (on average 3.4367009275507647) internal successors, (54836), 15956 states have internal predecessors, (54836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:57,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15957 states to 15957 states and 54836 transitions. [2021-06-05 16:55:57,343 INFO L78 Accepts]: Start accepts. Automaton has 15957 states and 54836 transitions. Word has length 36 [2021-06-05 16:55:57,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:57,343 INFO L482 AbstractCegarLoop]: Abstraction has 15957 states and 54836 transitions. [2021-06-05 16:55:57,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:57,344 INFO L276 IsEmpty]: Start isEmpty. Operand 15957 states and 54836 transitions. [2021-06-05 16:55:57,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:57,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:57,367 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:57,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:57,568 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:57,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:57,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1525571952, now seen corresponding path program 97 times [2021-06-05 16:55:57,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:57,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513997884] [2021-06-05 16:55:57,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:57,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:57,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513997884] [2021-06-05 16:55:57,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513997884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:57,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631954394] [2021-06-05 16:55:57,634 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 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 16:55:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:57,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:55:57,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:57,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631954394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:57,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:57,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 16:55:57,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333444541] [2021-06-05 16:55:57,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:55:57,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:57,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:55:57,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:55:57,799 INFO L87 Difference]: Start difference. First operand 15957 states and 54836 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:59,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:59,032 INFO L93 Difference]: Finished difference Result 31024 states and 101059 transitions. [2021-06-05 16:55:59,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 16:55:59,032 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:55:59,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:59,087 INFO L225 Difference]: With dead ends: 31024 [2021-06-05 16:55:59,087 INFO L226 Difference]: Without dead ends: 31024 [2021-06-05 16:55:59,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 798.9ms TimeCoverageRelationStatistics Valid=1344, Invalid=3912, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 16:55:59,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31024 states. [2021-06-05 16:55:59,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31024 to 16979. [2021-06-05 16:55:59,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16979 states, 16978 states have (on average 3.408234185416421) internal successors, (57865), 16978 states have internal predecessors, (57865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16979 states to 16979 states and 57865 transitions. [2021-06-05 16:55:59,504 INFO L78 Accepts]: Start accepts. Automaton has 16979 states and 57865 transitions. Word has length 36 [2021-06-05 16:55:59,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:59,504 INFO L482 AbstractCegarLoop]: Abstraction has 16979 states and 57865 transitions. [2021-06-05 16:55:59,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:59,504 INFO L276 IsEmpty]: Start isEmpty. Operand 16979 states and 57865 transitions. [2021-06-05 16:55:59,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:55:59,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:59,527 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:59,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 16:55:59,728 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:59,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:59,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1354812750, now seen corresponding path program 98 times [2021-06-05 16:55:59,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:59,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030312581] [2021-06-05 16:55:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:59,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:59,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030312581] [2021-06-05 16:55:59,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030312581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:59,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671236227] [2021-06-05 16:55:59,781 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 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 16:55:59,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:59,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:59,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:55:59,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:56:00,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671236227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:00,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:00,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 16:56:00,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224808866] [2021-06-05 16:56:00,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:56:00,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:00,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:56:00,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:56:00,034 INFO L87 Difference]: Start difference. First operand 16979 states and 57865 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:02,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:02,309 INFO L93 Difference]: Finished difference Result 33282 states and 107796 transitions. [2021-06-05 16:56:02,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-06-05 16:56:02,309 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:56:02,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:02,368 INFO L225 Difference]: With dead ends: 33282 [2021-06-05 16:56:02,368 INFO L226 Difference]: Without dead ends: 33254 [2021-06-05 16:56:02,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7204 ImplicationChecksByTransitivity, 1730.1ms TimeCoverageRelationStatistics Valid=3502, Invalid=14320, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 16:56:02,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33254 states. [2021-06-05 16:56:02,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33254 to 16803. [2021-06-05 16:56:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16803 states, 16802 states have (on average 3.411082014045947) internal successors, (57313), 16802 states have internal predecessors, (57313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:02,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16803 states to 16803 states and 57313 transitions. [2021-06-05 16:56:02,801 INFO L78 Accepts]: Start accepts. Automaton has 16803 states and 57313 transitions. Word has length 36 [2021-06-05 16:56:02,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:02,801 INFO L482 AbstractCegarLoop]: Abstraction has 16803 states and 57313 transitions. [2021-06-05 16:56:02,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:02,801 INFO L276 IsEmpty]: Start isEmpty. Operand 16803 states and 57313 transitions. [2021-06-05 16:56:02,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:56:02,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:02,823 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:03,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 16:56:03,024 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:03,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:03,024 INFO L82 PathProgramCache]: Analyzing trace with hash 2057609742, now seen corresponding path program 99 times [2021-06-05 16:56:03,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:03,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257227845] [2021-06-05 16:56:03,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:03,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:03,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257227845] [2021-06-05 16:56:03,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257227845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:03,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750301401] [2021-06-05 16:56:03,076 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 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 16:56:03,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 16:56:03,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:03,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:56:03,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:03,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750301401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:03,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:03,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 16:56:03,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684865755] [2021-06-05 16:56:03,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:56:03,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:03,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:56:03,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:56:03,215 INFO L87 Difference]: Start difference. First operand 16803 states and 57313 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:04,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:04,640 INFO L93 Difference]: Finished difference Result 30475 states and 100578 transitions. [2021-06-05 16:56:04,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 16:56:04,640 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:56:04,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:04,695 INFO L225 Difference]: With dead ends: 30475 [2021-06-05 16:56:04,695 INFO L226 Difference]: Without dead ends: 30411 [2021-06-05 16:56:04,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 944.3ms TimeCoverageRelationStatistics Valid=1678, Invalid=5978, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 16:56:04,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30411 states. [2021-06-05 16:56:05,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30411 to 16624. [2021-06-05 16:56:05,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16624 states, 16623 states have (on average 3.411417914937135) internal successors, (56708), 16623 states have internal predecessors, (56708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:05,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16624 states to 16624 states and 56708 transitions. [2021-06-05 16:56:05,084 INFO L78 Accepts]: Start accepts. Automaton has 16624 states and 56708 transitions. Word has length 36 [2021-06-05 16:56:05,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:05,084 INFO L482 AbstractCegarLoop]: Abstraction has 16624 states and 56708 transitions. [2021-06-05 16:56:05,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:05,084 INFO L276 IsEmpty]: Start isEmpty. Operand 16624 states and 56708 transitions. [2021-06-05 16:56:05,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:56:05,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:05,106 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:05,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:05,307 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:05,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:05,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1448352448, now seen corresponding path program 100 times [2021-06-05 16:56:05,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:05,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576759929] [2021-06-05 16:56:05,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:05,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:05,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576759929] [2021-06-05 16:56:05,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576759929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:05,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749561079] [2021-06-05 16:56:05,362 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 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 16:56:05,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:56:05,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:05,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:56:05,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:05,522 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:05,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749561079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:05,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:05,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 16:56:05,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234012797] [2021-06-05 16:56:05,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:56:05,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:05,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:56:05,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:56:05,523 INFO L87 Difference]: Start difference. First operand 16624 states and 56708 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:06,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:06,477 INFO L93 Difference]: Finished difference Result 32379 states and 105054 transitions. [2021-06-05 16:56:06,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:56:06,477 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:56:06,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:06,536 INFO L225 Difference]: With dead ends: 32379 [2021-06-05 16:56:06,536 INFO L226 Difference]: Without dead ends: 32379 [2021-06-05 16:56:06,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 534.3ms TimeCoverageRelationStatistics Valid=832, Invalid=2360, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:56:06,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32379 states. [2021-06-05 16:56:07,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32379 to 17402. [2021-06-05 16:56:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17402 states, 17401 states have (on average 3.3985977817366817) internal successors, (59139), 17401 states have internal predecessors, (59139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17402 states to 17402 states and 59139 transitions. [2021-06-05 16:56:07,058 INFO L78 Accepts]: Start accepts. Automaton has 17402 states and 59139 transitions. Word has length 36 [2021-06-05 16:56:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:07,058 INFO L482 AbstractCegarLoop]: Abstraction has 17402 states and 59139 transitions. [2021-06-05 16:56:07,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:07,059 INFO L276 IsEmpty]: Start isEmpty. Operand 17402 states and 59139 transitions. [2021-06-05 16:56:07,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:56:07,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:07,082 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:07,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:07,283 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:07,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:07,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1791237454, now seen corresponding path program 101 times [2021-06-05 16:56:07,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:07,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142084567] [2021-06-05 16:56:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:07,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:07,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142084567] [2021-06-05 16:56:07,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142084567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:07,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656548129] [2021-06-05 16:56:07,336 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 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 16:56:07,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 16:56:07,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:07,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:56:07,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:07,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656548129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:07,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:07,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 16:56:07,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705703357] [2021-06-05 16:56:07,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:56:07,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:07,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:56:07,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:56:07,486 INFO L87 Difference]: Start difference. First operand 17402 states and 59139 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:08,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:08,312 INFO L93 Difference]: Finished difference Result 31791 states and 103499 transitions. [2021-06-05 16:56:08,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:56:08,313 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:56:08,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:08,369 INFO L225 Difference]: With dead ends: 31791 [2021-06-05 16:56:08,370 INFO L226 Difference]: Without dead ends: 31779 [2021-06-05 16:56:08,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 434.9ms TimeCoverageRelationStatistics Valid=606, Invalid=1944, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:56:08,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31779 states. [2021-06-05 16:56:08,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31779 to 17354. [2021-06-05 16:56:08,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17354 states, 17353 states have (on average 3.3990088169192645) internal successors, (58983), 17353 states have internal predecessors, (58983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17354 states to 17354 states and 58983 transitions. [2021-06-05 16:56:08,801 INFO L78 Accepts]: Start accepts. Automaton has 17354 states and 58983 transitions. Word has length 36 [2021-06-05 16:56:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:08,801 INFO L482 AbstractCegarLoop]: Abstraction has 17354 states and 58983 transitions. [2021-06-05 16:56:08,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:08,801 INFO L276 IsEmpty]: Start isEmpty. Operand 17354 states and 58983 transitions. [2021-06-05 16:56:08,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:56:08,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:08,824 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:09,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:09,024 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:09,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:09,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1020594904, now seen corresponding path program 102 times [2021-06-05 16:56:09,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:09,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593914040] [2021-06-05 16:56:09,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:09,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:09,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593914040] [2021-06-05 16:56:09,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593914040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:09,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032836132] [2021-06-05 16:56:09,076 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 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 16:56:09,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 16:56:09,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:09,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:56:09,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:56:09,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032836132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:09,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:09,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 16:56:09,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840392198] [2021-06-05 16:56:09,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:56:09,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:09,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:56:09,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:56:09,240 INFO L87 Difference]: Start difference. First operand 17354 states and 58983 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:12,258 INFO L93 Difference]: Finished difference Result 32845 states and 106582 transitions. [2021-06-05 16:56:12,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-06-05 16:56:12,258 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:56:12,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:12,321 INFO L225 Difference]: With dead ends: 32845 [2021-06-05 16:56:12,322 INFO L226 Difference]: Without dead ends: 32825 [2021-06-05 16:56:12,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11588 ImplicationChecksByTransitivity, 2203.9ms TimeCoverageRelationStatistics Valid=4603, Invalid=23453, Unknown=0, NotChecked=0, Total=28056 [2021-06-05 16:56:12,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32825 states. [2021-06-05 16:56:12,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32825 to 17254. [2021-06-05 16:56:12,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17254 states, 17253 states have (on average 3.4028284935953166) internal successors, (58709), 17253 states have internal predecessors, (58709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:12,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17254 states to 17254 states and 58709 transitions. [2021-06-05 16:56:12,780 INFO L78 Accepts]: Start accepts. Automaton has 17254 states and 58709 transitions. Word has length 36 [2021-06-05 16:56:12,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:12,780 INFO L482 AbstractCegarLoop]: Abstraction has 17254 states and 58709 transitions. [2021-06-05 16:56:12,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:12,780 INFO L276 IsEmpty]: Start isEmpty. Operand 17254 states and 58709 transitions. [2021-06-05 16:56:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:56:12,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:12,805 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:13,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 16:56:13,006 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:13,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:13,006 INFO L82 PathProgramCache]: Analyzing trace with hash 590890608, now seen corresponding path program 103 times [2021-06-05 16:56:13,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:13,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563340449] [2021-06-05 16:56:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:56:13,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:13,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563340449] [2021-06-05 16:56:13,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563340449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:13,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097181539] [2021-06-05 16:56:13,051 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 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 16:56:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:13,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:56:13,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:13,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097181539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:13,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:13,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:56:13,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629131136] [2021-06-05 16:56:13,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:56:13,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:13,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:56:13,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:56:13,199 INFO L87 Difference]: Start difference. First operand 17254 states and 58709 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:13,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:13,884 INFO L93 Difference]: Finished difference Result 36771 states and 121891 transitions. [2021-06-05 16:56:13,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:56:13,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:56:13,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:13,958 INFO L225 Difference]: With dead ends: 36771 [2021-06-05 16:56:13,958 INFO L226 Difference]: Without dead ends: 36771 [2021-06-05 16:56:13,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 305.7ms TimeCoverageRelationStatistics Valid=403, Invalid=1157, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:56:13,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36771 states. [2021-06-05 16:56:14,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36771 to 17615. [2021-06-05 16:56:14,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17615 states, 17614 states have (on average 3.421653230384921) internal successors, (60269), 17614 states have internal predecessors, (60269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:14,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17615 states to 17615 states and 60269 transitions. [2021-06-05 16:56:14,508 INFO L78 Accepts]: Start accepts. Automaton has 17615 states and 60269 transitions. Word has length 36 [2021-06-05 16:56:14,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:14,508 INFO L482 AbstractCegarLoop]: Abstraction has 17615 states and 60269 transitions. [2021-06-05 16:56:14,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:14,508 INFO L276 IsEmpty]: Start isEmpty. Operand 17615 states and 60269 transitions. [2021-06-05 16:56:14,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:56:14,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:14,532 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:14,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 16:56:14,745 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:14,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:14,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1255821764, now seen corresponding path program 104 times [2021-06-05 16:56:14,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:14,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301767733] [2021-06-05 16:56:14,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:14,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:14,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:14,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301767733] [2021-06-05 16:56:14,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301767733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:14,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813824084] [2021-06-05 16:56:14,852 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 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 16:56:14,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:14,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:14,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:56:14,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:56:15,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813824084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:15,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:15,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 16:56:15,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249983390] [2021-06-05 16:56:15,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:56:15,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:15,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:56:15,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:56:15,009 INFO L87 Difference]: Start difference. First operand 17615 states and 60269 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:17,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:17,939 INFO L93 Difference]: Finished difference Result 43448 states and 142049 transitions. [2021-06-05 16:56:17,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-06-05 16:56:17,939 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:56:17,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:18,026 INFO L225 Difference]: With dead ends: 43448 [2021-06-05 16:56:18,026 INFO L226 Difference]: Without dead ends: 43448 [2021-06-05 16:56:18,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11743 ImplicationChecksByTransitivity, 2087.8ms TimeCoverageRelationStatistics Valid=5181, Invalid=22209, Unknown=0, NotChecked=0, Total=27390 [2021-06-05 16:56:18,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43448 states. [2021-06-05 16:56:18,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43448 to 17843. [2021-06-05 16:56:18,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17843 states, 17842 states have (on average 3.444064566752606) internal successors, (61449), 17842 states have internal predecessors, (61449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:18,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17843 states to 17843 states and 61449 transitions. [2021-06-05 16:56:18,645 INFO L78 Accepts]: Start accepts. Automaton has 17843 states and 61449 transitions. Word has length 36 [2021-06-05 16:56:18,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:18,645 INFO L482 AbstractCegarLoop]: Abstraction has 17843 states and 61449 transitions. [2021-06-05 16:56:18,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:18,645 INFO L276 IsEmpty]: Start isEmpty. Operand 17843 states and 61449 transitions. [2021-06-05 16:56:18,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:56:18,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:18,670 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:18,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 16:56:18,871 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:18,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:18,871 INFO L82 PathProgramCache]: Analyzing trace with hash -428849322, now seen corresponding path program 105 times [2021-06-05 16:56:18,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:18,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706591185] [2021-06-05 16:56:18,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:18,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:18,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706591185] [2021-06-05 16:56:18,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706591185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:18,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881810626] [2021-06-05 16:56:18,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:56:18,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:56:18,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:18,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:56:18,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:19,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881810626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:19,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:19,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 16:56:19,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603712947] [2021-06-05 16:56:19,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:56:19,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:19,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:56:19,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:56:19,077 INFO L87 Difference]: Start difference. First operand 17843 states and 61449 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:21,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:21,155 INFO L93 Difference]: Finished difference Result 39837 states and 131123 transitions. [2021-06-05 16:56:21,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 16:56:21,155 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:56:21,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:21,241 INFO L225 Difference]: With dead ends: 39837 [2021-06-05 16:56:21,241 INFO L226 Difference]: Without dead ends: 39721 [2021-06-05 16:56:21,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6312 ImplicationChecksByTransitivity, 1369.4ms TimeCoverageRelationStatistics Valid=3104, Invalid=12396, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 16:56:21,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39721 states. [2021-06-05 16:56:21,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39721 to 17669. [2021-06-05 16:56:21,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17669 states, 17668 states have (on average 3.4479284582295677) internal successors, (60918), 17668 states have internal predecessors, (60918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:21,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17669 states to 17669 states and 60918 transitions. [2021-06-05 16:56:21,921 INFO L78 Accepts]: Start accepts. Automaton has 17669 states and 60918 transitions. Word has length 36 [2021-06-05 16:56:21,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:21,921 INFO L482 AbstractCegarLoop]: Abstraction has 17669 states and 60918 transitions. [2021-06-05 16:56:21,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:21,921 INFO L276 IsEmpty]: Start isEmpty. Operand 17669 states and 60918 transitions. [2021-06-05 16:56:21,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:56:21,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:21,945 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:22,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 16:56:22,145 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:22,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:22,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1065316176, now seen corresponding path program 106 times [2021-06-05 16:56:22,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:22,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091066003] [2021-06-05 16:56:22,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:22,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:22,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091066003] [2021-06-05 16:56:22,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091066003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:22,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680871269] [2021-06-05 16:56:22,209 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 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 16:56:22,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:56:22,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:22,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:56:22,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:56:22,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680871269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:22,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:22,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-06-05 16:56:22,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867297989] [2021-06-05 16:56:22,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:56:22,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:22,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:56:22,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:56:22,353 INFO L87 Difference]: Start difference. First operand 17669 states and 60918 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:24,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:24,241 INFO L93 Difference]: Finished difference Result 38843 states and 128526 transitions. [2021-06-05 16:56:24,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-05 16:56:24,242 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:56:24,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:24,318 INFO L225 Difference]: With dead ends: 38843 [2021-06-05 16:56:24,319 INFO L226 Difference]: Without dead ends: 38727 [2021-06-05 16:56:24,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5135 ImplicationChecksByTransitivity, 1222.4ms TimeCoverageRelationStatistics Valid=2357, Invalid=10983, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 16:56:24,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38727 states. [2021-06-05 16:56:24,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38727 to 17699. [2021-06-05 16:56:24,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17699 states, 17698 states have (on average 3.446208611142502) internal successors, (60991), 17698 states have internal predecessors, (60991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17699 states to 17699 states and 60991 transitions. [2021-06-05 16:56:24,880 INFO L78 Accepts]: Start accepts. Automaton has 17699 states and 60991 transitions. Word has length 36 [2021-06-05 16:56:24,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:24,880 INFO L482 AbstractCegarLoop]: Abstraction has 17699 states and 60991 transitions. [2021-06-05 16:56:24,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:24,880 INFO L276 IsEmpty]: Start isEmpty. Operand 17699 states and 60991 transitions. [2021-06-05 16:56:24,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:56:24,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:24,905 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:25,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:25,105 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:25,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:25,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1348989260, now seen corresponding path program 107 times [2021-06-05 16:56:25,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:25,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531845951] [2021-06-05 16:56:25,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:25,179 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:25,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:25,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531845951] [2021-06-05 16:56:25,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531845951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:25,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856991404] [2021-06-05 16:56:25,180 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 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 16:56:25,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:56:25,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:25,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:56:25,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:56:25,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856991404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:25,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:25,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2021-06-05 16:56:25,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081695069] [2021-06-05 16:56:25,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:56:25,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:25,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:56:25,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:56:25,307 INFO L87 Difference]: Start difference. First operand 17699 states and 60991 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:27,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:27,109 INFO L93 Difference]: Finished difference Result 37783 states and 125271 transitions. [2021-06-05 16:56:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 16:56:27,109 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:56:27,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:27,180 INFO L225 Difference]: With dead ends: 37783 [2021-06-05 16:56:27,180 INFO L226 Difference]: Without dead ends: 37663 [2021-06-05 16:56:27,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4108 ImplicationChecksByTransitivity, 1185.6ms TimeCoverageRelationStatistics Valid=2049, Invalid=9081, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 16:56:27,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37663 states. [2021-06-05 16:56:27,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37663 to 18035. [2021-06-05 16:56:27,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18035 states, 18034 states have (on average 3.456692913385827) internal successors, (62338), 18034 states have internal predecessors, (62338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:27,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18035 states to 18035 states and 62338 transitions. [2021-06-05 16:56:27,714 INFO L78 Accepts]: Start accepts. Automaton has 18035 states and 62338 transitions. Word has length 36 [2021-06-05 16:56:27,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:27,715 INFO L482 AbstractCegarLoop]: Abstraction has 18035 states and 62338 transitions. [2021-06-05 16:56:27,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:27,715 INFO L276 IsEmpty]: Start isEmpty. Operand 18035 states and 62338 transitions. [2021-06-05 16:56:27,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:56:27,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:27,740 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:27,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 16:56:27,940 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:27,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:27,941 INFO L82 PathProgramCache]: Analyzing trace with hash 255839428, now seen corresponding path program 108 times [2021-06-05 16:56:27,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:27,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754625574] [2021-06-05 16:56:27,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:56:27,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:27,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754625574] [2021-06-05 16:56:27,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754625574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:27,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995671585] [2021-06-05 16:56:27,981 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 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 16:56:28,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:56:28,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:28,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:56:28,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:28,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995671585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:28,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:28,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 16:56:28,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873769878] [2021-06-05 16:56:28,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:56:28,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:28,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:56:28,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:56:28,115 INFO L87 Difference]: Start difference. First operand 18035 states and 62338 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:29,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:29,594 INFO L93 Difference]: Finished difference Result 41243 states and 137063 transitions. [2021-06-05 16:56:29,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 16:56:29,595 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:56:29,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:29,675 INFO L225 Difference]: With dead ends: 41243 [2021-06-05 16:56:29,675 INFO L226 Difference]: Without dead ends: 41243 [2021-06-05 16:56:29,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 883.7ms TimeCoverageRelationStatistics Valid=1732, Invalid=6100, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 16:56:29,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41243 states. [2021-06-05 16:56:30,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41243 to 18004. [2021-06-05 16:56:30,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18004 states, 18003 states have (on average 3.4605343553852137) internal successors, (62300), 18003 states have internal predecessors, (62300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:30,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18004 states to 18004 states and 62300 transitions. [2021-06-05 16:56:30,266 INFO L78 Accepts]: Start accepts. Automaton has 18004 states and 62300 transitions. Word has length 36 [2021-06-05 16:56:30,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:30,266 INFO L482 AbstractCegarLoop]: Abstraction has 18004 states and 62300 transitions. [2021-06-05 16:56:30,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 18004 states and 62300 transitions. [2021-06-05 16:56:30,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:56:30,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:30,289 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:30,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 16:56:30,490 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:30,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:30,490 INFO L82 PathProgramCache]: Analyzing trace with hash 30795628, now seen corresponding path program 109 times [2021-06-05 16:56:30,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:30,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880575386] [2021-06-05 16:56:30,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:30,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:30,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880575386] [2021-06-05 16:56:30,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880575386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:30,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826204936] [2021-06-05 16:56:30,549 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 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 16:56:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:30,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:56:30,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:56:30,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826204936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:30,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:30,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 16:56:30,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440805101] [2021-06-05 16:56:30,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:56:30,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:30,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:56:30,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:56:30,658 INFO L87 Difference]: Start difference. First operand 18004 states and 62300 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:32,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:32,044 INFO L93 Difference]: Finished difference Result 39031 states and 128601 transitions. [2021-06-05 16:56:32,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 16:56:32,045 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:56:32,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:32,113 INFO L225 Difference]: With dead ends: 39031 [2021-06-05 16:56:32,113 INFO L226 Difference]: Without dead ends: 38811 [2021-06-05 16:56:32,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2721 ImplicationChecksByTransitivity, 805.7ms TimeCoverageRelationStatistics Valid=1466, Invalid=6190, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 16:56:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38811 states. [2021-06-05 16:56:32,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38811 to 18070. [2021-06-05 16:56:32,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18070 states, 18069 states have (on average 3.458354087110521) internal successors, (62489), 18069 states have internal predecessors, (62489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:32,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18070 states to 18070 states and 62489 transitions. [2021-06-05 16:56:32,628 INFO L78 Accepts]: Start accepts. Automaton has 18070 states and 62489 transitions. Word has length 36 [2021-06-05 16:56:32,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:32,628 INFO L482 AbstractCegarLoop]: Abstraction has 18070 states and 62489 transitions. [2021-06-05 16:56:32,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 18070 states and 62489 transitions. [2021-06-05 16:56:32,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:56:32,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:32,651 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:32,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:32,852 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:32,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:32,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1503096560, now seen corresponding path program 110 times [2021-06-05 16:56:32,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:32,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519049871] [2021-06-05 16:56:32,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:32,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:32,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519049871] [2021-06-05 16:56:32,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519049871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:32,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226017595] [2021-06-05 16:56:32,902 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 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 16:56:32,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:32,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:32,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:56:32,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:56:33,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226017595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:33,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:33,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 16:56:33,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357138817] [2021-06-05 16:56:33,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:56:33,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:33,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:56:33,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:56:33,018 INFO L87 Difference]: Start difference. First operand 18070 states and 62489 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:35,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:35,158 INFO L93 Difference]: Finished difference Result 41905 states and 136821 transitions. [2021-06-05 16:56:35,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-06-05 16:56:35,159 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:56:35,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:35,239 INFO L225 Difference]: With dead ends: 41905 [2021-06-05 16:56:35,239 INFO L226 Difference]: Without dead ends: 41889 [2021-06-05 16:56:35,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7569 ImplicationChecksByTransitivity, 1448.8ms TimeCoverageRelationStatistics Valid=3281, Invalid=14541, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 16:56:35,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41889 states. [2021-06-05 16:56:35,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41889 to 18381. [2021-06-05 16:56:35,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18381 states, 18380 states have (on average 3.4394450489662676) internal successors, (63217), 18380 states have internal predecessors, (63217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:35,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18381 states to 18381 states and 63217 transitions. [2021-06-05 16:56:35,844 INFO L78 Accepts]: Start accepts. Automaton has 18381 states and 63217 transitions. Word has length 36 [2021-06-05 16:56:35,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:35,844 INFO L482 AbstractCegarLoop]: Abstraction has 18381 states and 63217 transitions. [2021-06-05 16:56:35,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:35,845 INFO L276 IsEmpty]: Start isEmpty. Operand 18381 states and 63217 transitions. [2021-06-05 16:56:35,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:56:35,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:35,870 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:36,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:36,071 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:36,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:36,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1164442992, now seen corresponding path program 111 times [2021-06-05 16:56:36,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:36,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026626242] [2021-06-05 16:56:36,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:36,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:36,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026626242] [2021-06-05 16:56:36,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026626242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:36,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916316551] [2021-06-05 16:56:36,130 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 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 16:56:36,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:56:36,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:36,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:56:36,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:36,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916316551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:36,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:36,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-06-05 16:56:36,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641152874] [2021-06-05 16:56:36,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:56:36,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:36,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:56:36,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:56:36,243 INFO L87 Difference]: Start difference. First operand 18381 states and 63217 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:37,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:37,950 INFO L93 Difference]: Finished difference Result 39347 states and 129043 transitions. [2021-06-05 16:56:37,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 16:56:37,950 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:56:37,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:38,031 INFO L225 Difference]: With dead ends: 39347 [2021-06-05 16:56:38,032 INFO L226 Difference]: Without dead ends: 39111 [2021-06-05 16:56:38,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3939 ImplicationChecksByTransitivity, 1058.3ms TimeCoverageRelationStatistics Valid=2013, Invalid=8907, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 16:56:38,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39111 states. [2021-06-05 16:56:38,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39111 to 18459. [2021-06-05 16:56:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18459 states, 18458 states have (on average 3.4369920901506124) internal successors, (63440), 18458 states have internal predecessors, (63440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:38,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18459 states to 18459 states and 63440 transitions. [2021-06-05 16:56:38,701 INFO L78 Accepts]: Start accepts. Automaton has 18459 states and 63440 transitions. Word has length 36 [2021-06-05 16:56:38,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:38,702 INFO L482 AbstractCegarLoop]: Abstraction has 18459 states and 63440 transitions. [2021-06-05 16:56:38,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:38,702 INFO L276 IsEmpty]: Start isEmpty. Operand 18459 states and 63440 transitions. [2021-06-05 16:56:38,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:56:38,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:38,727 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:38,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:38,927 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:38,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:38,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1293569036, now seen corresponding path program 112 times [2021-06-05 16:56:38,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:38,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102171402] [2021-06-05 16:56:38,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:38,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:38,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:38,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:38,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102171402] [2021-06-05 16:56:38,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102171402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:38,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208909848] [2021-06-05 16:56:38,986 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 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 16:56:39,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:56:39,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:39,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:56:39,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:56:39,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208909848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:39,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:39,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2021-06-05 16:56:39,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058621375] [2021-06-05 16:56:39,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:56:39,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:39,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:56:39,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:56:39,096 INFO L87 Difference]: Start difference. First operand 18459 states and 63440 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:40,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:40,778 INFO L93 Difference]: Finished difference Result 38875 states and 128248 transitions. [2021-06-05 16:56:40,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 16:56:40,779 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:56:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:40,849 INFO L225 Difference]: With dead ends: 38875 [2021-06-05 16:56:40,850 INFO L226 Difference]: Without dead ends: 38767 [2021-06-05 16:56:40,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4742 ImplicationChecksByTransitivity, 1066.4ms TimeCoverageRelationStatistics Valid=2364, Invalid=9626, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 16:56:40,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38767 states. [2021-06-05 16:56:41,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38767 to 18901. [2021-06-05 16:56:41,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18901 states, 18900 states have (on average 3.4197354497354495) internal successors, (64633), 18900 states have internal predecessors, (64633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:41,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18901 states to 18901 states and 64633 transitions. [2021-06-05 16:56:41,379 INFO L78 Accepts]: Start accepts. Automaton has 18901 states and 64633 transitions. Word has length 36 [2021-06-05 16:56:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:41,379 INFO L482 AbstractCegarLoop]: Abstraction has 18901 states and 64633 transitions. [2021-06-05 16:56:41,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:41,379 INFO L276 IsEmpty]: Start isEmpty. Operand 18901 states and 64633 transitions. [2021-06-05 16:56:41,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:56:41,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:41,403 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:41,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-06-05 16:56:41,603 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:41,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:41,604 INFO L82 PathProgramCache]: Analyzing trace with hash -253287824, now seen corresponding path program 113 times [2021-06-05 16:56:41,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:41,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658108610] [2021-06-05 16:56:41,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:41,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:41,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658108610] [2021-06-05 16:56:41,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658108610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:41,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032327485] [2021-06-05 16:56:41,662 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 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 16:56:41,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:56:41,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:41,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:56:41,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:41,780 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:41,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032327485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:41,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:41,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2021-06-05 16:56:41,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022470826] [2021-06-05 16:56:41,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:56:41,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:41,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:56:41,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:56:41,781 INFO L87 Difference]: Start difference. First operand 18901 states and 64633 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:44,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:44,178 INFO L93 Difference]: Finished difference Result 40691 states and 133194 transitions. [2021-06-05 16:56:44,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-06-05 16:56:44,178 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:56:44,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:44,253 INFO L225 Difference]: With dead ends: 40691 [2021-06-05 16:56:44,253 INFO L226 Difference]: Without dead ends: 40691 [2021-06-05 16:56:44,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10041 ImplicationChecksByTransitivity, 1628.3ms TimeCoverageRelationStatistics Valid=4335, Invalid=18315, Unknown=0, NotChecked=0, Total=22650 [2021-06-05 16:56:44,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40691 states. [2021-06-05 16:56:44,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40691 to 17027. [2021-06-05 16:56:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17027 states, 17026 states have (on average 3.482086221073652) internal successors, (59286), 17026 states have internal predecessors, (59286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17027 states to 17027 states and 59286 transitions. [2021-06-05 16:56:44,779 INFO L78 Accepts]: Start accepts. Automaton has 17027 states and 59286 transitions. Word has length 36 [2021-06-05 16:56:44,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:44,779 INFO L482 AbstractCegarLoop]: Abstraction has 17027 states and 59286 transitions. [2021-06-05 16:56:44,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:44,780 INFO L276 IsEmpty]: Start isEmpty. Operand 17027 states and 59286 transitions. [2021-06-05 16:56:44,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:56:44,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:44,801 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:45,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 16:56:45,009 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:45,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:45,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1172720400, now seen corresponding path program 114 times [2021-06-05 16:56:45,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:45,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904985335] [2021-06-05 16:56:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:56:45,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:45,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904985335] [2021-06-05 16:56:45,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904985335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:45,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239803058] [2021-06-05 16:56:45,062 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 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 16:56:45,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:56:45,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:45,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:56:45,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:45,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239803058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:45,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:45,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 16:56:45,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067563865] [2021-06-05 16:56:45,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:56:45,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:45,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:56:45,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:56:45,216 INFO L87 Difference]: Start difference. First operand 17027 states and 59286 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:46,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:46,017 INFO L93 Difference]: Finished difference Result 36359 states and 121507 transitions. [2021-06-05 16:56:46,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:56:46,017 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:56:46,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:46,082 INFO L225 Difference]: With dead ends: 36359 [2021-06-05 16:56:46,083 INFO L226 Difference]: Without dead ends: 36359 [2021-06-05 16:56:46,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 390.0ms TimeCoverageRelationStatistics Valid=568, Invalid=1784, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:56:46,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36359 states. [2021-06-05 16:56:46,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36359 to 17013. [2021-06-05 16:56:46,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17013 states, 17012 states have (on average 3.477251351986833) internal successors, (59155), 17012 states have internal predecessors, (59155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17013 states to 17013 states and 59155 transitions. [2021-06-05 16:56:46,599 INFO L78 Accepts]: Start accepts. Automaton has 17013 states and 59155 transitions. Word has length 36 [2021-06-05 16:56:46,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:46,599 INFO L482 AbstractCegarLoop]: Abstraction has 17013 states and 59155 transitions. [2021-06-05 16:56:46,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:46,599 INFO L276 IsEmpty]: Start isEmpty. Operand 17013 states and 59155 transitions. [2021-06-05 16:56:46,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:56:46,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:46,621 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:46,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 16:56:46,822 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:46,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:46,822 INFO L82 PathProgramCache]: Analyzing trace with hash -248629260, now seen corresponding path program 115 times [2021-06-05 16:56:46,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:46,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073936090] [2021-06-05 16:56:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:56:46,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:46,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073936090] [2021-06-05 16:56:46,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073936090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:46,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136218748] [2021-06-05 16:56:46,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:56:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:46,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:56:46,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:47,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136218748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:47,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:47,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 16:56:47,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632071703] [2021-06-05 16:56:47,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:56:47,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:47,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:56:47,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:56:47,045 INFO L87 Difference]: Start difference. First operand 17013 states and 59155 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:48,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:48,141 INFO L93 Difference]: Finished difference Result 37754 states and 124912 transitions. [2021-06-05 16:56:48,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:56:48,142 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:56:48,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:48,209 INFO L225 Difference]: With dead ends: 37754 [2021-06-05 16:56:48,209 INFO L226 Difference]: Without dead ends: 37754 [2021-06-05 16:56:48,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 559.8ms TimeCoverageRelationStatistics Valid=910, Invalid=2996, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:56:48,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37754 states. [2021-06-05 16:56:48,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37754 to 17024. [2021-06-05 16:56:48,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17024 states, 17023 states have (on average 3.4766492392645243) internal successors, (59183), 17023 states have internal predecessors, (59183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17024 states to 17024 states and 59183 transitions. [2021-06-05 16:56:48,688 INFO L78 Accepts]: Start accepts. Automaton has 17024 states and 59183 transitions. Word has length 36 [2021-06-05 16:56:48,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:48,688 INFO L482 AbstractCegarLoop]: Abstraction has 17024 states and 59183 transitions. [2021-06-05 16:56:48,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:48,688 INFO L276 IsEmpty]: Start isEmpty. Operand 17024 states and 59183 transitions. [2021-06-05 16:56:48,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:56:48,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:48,710 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:48,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 16:56:48,911 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:48,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:48,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1447944180, now seen corresponding path program 116 times [2021-06-05 16:56:48,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:48,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613885173] [2021-06-05 16:56:48,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:56:48,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:48,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613885173] [2021-06-05 16:56:48,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613885173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:48,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105490080] [2021-06-05 16:56:48,962 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 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 16:56:48,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:48,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:48,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:56:48,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:49,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105490080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:49,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:49,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 16:56:49,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600037030] [2021-06-05 16:56:49,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:56:49,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:49,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:56:49,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:56:49,140 INFO L87 Difference]: Start difference. First operand 17024 states and 59183 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:50,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:50,296 INFO L93 Difference]: Finished difference Result 37846 states and 125454 transitions. [2021-06-05 16:56:50,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 16:56:50,297 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:56:50,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:50,367 INFO L225 Difference]: With dead ends: 37846 [2021-06-05 16:56:50,368 INFO L226 Difference]: Without dead ends: 37846 [2021-06-05 16:56:50,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 614.7ms TimeCoverageRelationStatistics Valid=959, Invalid=3073, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:56:50,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37846 states. [2021-06-05 16:56:50,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37846 to 17016. [2021-06-05 16:56:50,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17016 states, 17015 states have (on average 3.4787540405524537) internal successors, (59191), 17015 states have internal predecessors, (59191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17016 states to 17016 states and 59191 transitions. [2021-06-05 16:56:50,889 INFO L78 Accepts]: Start accepts. Automaton has 17016 states and 59191 transitions. Word has length 36 [2021-06-05 16:56:50,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:50,889 INFO L482 AbstractCegarLoop]: Abstraction has 17016 states and 59191 transitions. [2021-06-05 16:56:50,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:50,889 INFO L276 IsEmpty]: Start isEmpty. Operand 17016 states and 59191 transitions. [2021-06-05 16:56:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:56:50,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:50,913 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:51,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 16:56:51,114 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:51,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1463404976, now seen corresponding path program 117 times [2021-06-05 16:56:51,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:51,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481406690] [2021-06-05 16:56:51,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:56:51,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:51,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481406690] [2021-06-05 16:56:51,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481406690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:51,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082528726] [2021-06-05 16:56:51,164 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 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 16:56:51,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:56:51,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:51,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 16:56:51,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:51,292 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 8 treesize of output 7 [2021-06-05 16:56:51,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:51,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:51,302 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 16:56:51,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-06-05 16:56:51,375 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 16:56:51,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:56:51,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:51,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:51,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:56:51,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-06-05 16:56:51,449 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-05 16:56:51,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 16:56:51,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:51,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:51,467 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 16:56:51,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:54 [2021-06-05 16:56:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 16:56:51,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082528726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:51,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:51,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 16:56:51,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625293316] [2021-06-05 16:56:51,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:56:51,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:51,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:56:51,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:56:51,634 INFO L87 Difference]: Start difference. First operand 17016 states and 59191 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:55,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:55,100 INFO L93 Difference]: Finished difference Result 29934 states and 99159 transitions. [2021-06-05 16:56:55,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 16:56:55,101 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:56:55,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:55,157 INFO L225 Difference]: With dead ends: 29934 [2021-06-05 16:56:55,157 INFO L226 Difference]: Without dead ends: 29934 [2021-06-05 16:56:55,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3260 ImplicationChecksByTransitivity, 2267.3ms TimeCoverageRelationStatistics Valid=1800, Invalid=8300, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 16:56:55,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29934 states. [2021-06-05 16:56:55,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29934 to 17104. [2021-06-05 16:56:55,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17104 states, 17103 states have (on average 3.484067122727007) internal successors, (59588), 17103 states have internal predecessors, (59588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:55,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17104 states to 17104 states and 59588 transitions. [2021-06-05 16:56:55,655 INFO L78 Accepts]: Start accepts. Automaton has 17104 states and 59588 transitions. Word has length 36 [2021-06-05 16:56:55,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:55,655 INFO L482 AbstractCegarLoop]: Abstraction has 17104 states and 59588 transitions. [2021-06-05 16:56:55,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:55,655 INFO L276 IsEmpty]: Start isEmpty. Operand 17104 states and 59588 transitions. [2021-06-05 16:56:55,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:56:55,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:55,680 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:55,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:55,886 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:55,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:55,887 INFO L82 PathProgramCache]: Analyzing trace with hash -784175790, now seen corresponding path program 118 times [2021-06-05 16:56:55,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:55,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533784369] [2021-06-05 16:56:55,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:55,934 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:56:55,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:55,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533784369] [2021-06-05 16:56:55,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533784369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:55,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574453161] [2021-06-05 16:56:55,935 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 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 16:56:55,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:56:55,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:55,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:56:55,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:56:56,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574453161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:56,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:56,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 16:56:56,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721634084] [2021-06-05 16:56:56,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:56:56,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:56,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:56:56,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:56:56,119 INFO L87 Difference]: Start difference. First operand 17104 states and 59588 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:58,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:58,795 INFO L93 Difference]: Finished difference Result 36789 states and 120419 transitions. [2021-06-05 16:56:58,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-06-05 16:56:58,795 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:56:58,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:58,864 INFO L225 Difference]: With dead ends: 36789 [2021-06-05 16:56:58,864 INFO L226 Difference]: Without dead ends: 36789 [2021-06-05 16:56:58,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7472 ImplicationChecksByTransitivity, 1748.3ms TimeCoverageRelationStatistics Valid=3298, Invalid=15608, Unknown=0, NotChecked=0, Total=18906 [2021-06-05 16:56:58,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36789 states. [2021-06-05 16:56:59,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36789 to 17371. [2021-06-05 16:56:59,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17371 states, 17370 states have (on average 3.482153137593552) internal successors, (60485), 17370 states have internal predecessors, (60485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:59,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17371 states to 17371 states and 60485 transitions. [2021-06-05 16:56:59,322 INFO L78 Accepts]: Start accepts. Automaton has 17371 states and 60485 transitions. Word has length 36 [2021-06-05 16:56:59,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:59,322 INFO L482 AbstractCegarLoop]: Abstraction has 17371 states and 60485 transitions. [2021-06-05 16:56:59,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:59,322 INFO L276 IsEmpty]: Start isEmpty. Operand 17371 states and 60485 transitions. [2021-06-05 16:56:59,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:56:59,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:59,345 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:59,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 16:56:59,545 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:59,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:59,546 INFO L82 PathProgramCache]: Analyzing trace with hash -265224148, now seen corresponding path program 119 times [2021-06-05 16:56:59,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:59,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833751133] [2021-06-05 16:56:59,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:59,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:59,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833751133] [2021-06-05 16:56:59,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833751133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:59,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062359463] [2021-06-05 16:56:59,597 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 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 16:56:59,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 16:56:59,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:59,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:56:59,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:59,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062359463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:59,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:59,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 16:56:59,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878610913] [2021-06-05 16:56:59,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:56:59,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:59,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:56:59,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:56:59,732 INFO L87 Difference]: Start difference. First operand 17371 states and 60485 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:01,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:01,337 INFO L93 Difference]: Finished difference Result 34245 states and 114443 transitions. [2021-06-05 16:57:01,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 16:57:01,337 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:57:01,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:01,399 INFO L225 Difference]: With dead ends: 34245 [2021-06-05 16:57:01,399 INFO L226 Difference]: Without dead ends: 34173 [2021-06-05 16:57:01,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3600 ImplicationChecksByTransitivity, 1040.6ms TimeCoverageRelationStatistics Valid=2064, Invalid=7836, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 16:57:01,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34173 states. [2021-06-05 16:57:01,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34173 to 16919. [2021-06-05 16:57:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16919 states, 16918 states have (on average 3.4816763210781416) internal successors, (58903), 16918 states have internal predecessors, (58903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:01,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16919 states to 16919 states and 58903 transitions. [2021-06-05 16:57:01,862 INFO L78 Accepts]: Start accepts. Automaton has 16919 states and 58903 transitions. Word has length 36 [2021-06-05 16:57:01,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:01,863 INFO L482 AbstractCegarLoop]: Abstraction has 16919 states and 58903 transitions. [2021-06-05 16:57:01,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:01,863 INFO L276 IsEmpty]: Start isEmpty. Operand 16919 states and 58903 transitions. [2021-06-05 16:57:01,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:57:01,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:01,884 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:02,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-05 16:57:02,085 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:02,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:02,085 INFO L82 PathProgramCache]: Analyzing trace with hash -907070356, now seen corresponding path program 120 times [2021-06-05 16:57:02,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:02,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960175492] [2021-06-05 16:57:02,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:02,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:02,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960175492] [2021-06-05 16:57:02,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960175492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:02,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405877408] [2021-06-05 16:57:02,145 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 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 16:57:02,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 16:57:02,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:02,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:57:02,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:57:02,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405877408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:02,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:02,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 16:57:02,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368642375] [2021-06-05 16:57:02,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:57:02,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:02,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:57:02,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:57:02,278 INFO L87 Difference]: Start difference. First operand 16919 states and 58903 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:04,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:04,077 INFO L93 Difference]: Finished difference Result 34016 states and 113681 transitions. [2021-06-05 16:57:04,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-05 16:57:04,077 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:57:04,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:04,140 INFO L225 Difference]: With dead ends: 34016 [2021-06-05 16:57:04,140 INFO L226 Difference]: Without dead ends: 33956 [2021-06-05 16:57:04,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4457 ImplicationChecksByTransitivity, 1139.0ms TimeCoverageRelationStatistics Valid=2358, Invalid=9852, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 16:57:04,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33956 states. [2021-06-05 16:57:04,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33956 to 16875. [2021-06-05 16:57:04,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16875 states, 16874 states have (on average 3.4836434751688987) internal successors, (58783), 16874 states have internal predecessors, (58783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16875 states to 16875 states and 58783 transitions. [2021-06-05 16:57:04,559 INFO L78 Accepts]: Start accepts. Automaton has 16875 states and 58783 transitions. Word has length 36 [2021-06-05 16:57:04,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:04,559 INFO L482 AbstractCegarLoop]: Abstraction has 16875 states and 58783 transitions. [2021-06-05 16:57:04,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:04,559 INFO L276 IsEmpty]: Start isEmpty. Operand 16875 states and 58783 transitions. [2021-06-05 16:57:04,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:57:04,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:04,582 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:04,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:04,782 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:04,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:04,782 INFO L82 PathProgramCache]: Analyzing trace with hash -719103608, now seen corresponding path program 121 times [2021-06-05 16:57:04,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:04,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057302071] [2021-06-05 16:57:04,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:04,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:04,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057302071] [2021-06-05 16:57:04,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057302071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:04,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831356434] [2021-06-05 16:57:04,837 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 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 16:57:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:04,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:57:04,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:57:05,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831356434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:05,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:05,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 16:57:05,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081514651] [2021-06-05 16:57:05,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:57:05,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:05,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:57:05,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:57:05,002 INFO L87 Difference]: Start difference. First operand 16875 states and 58783 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:06,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:06,053 INFO L93 Difference]: Finished difference Result 38582 states and 129677 transitions. [2021-06-05 16:57:06,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 16:57:06,053 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:57:06,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:06,127 INFO L225 Difference]: With dead ends: 38582 [2021-06-05 16:57:06,127 INFO L226 Difference]: Without dead ends: 38582 [2021-06-05 16:57:06,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 586.3ms TimeCoverageRelationStatistics Valid=922, Invalid=3110, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:57:06,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38582 states. [2021-06-05 16:57:06,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38582 to 17496. [2021-06-05 16:57:06,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17496 states, 17495 states have (on average 3.5108316661903403) internal successors, (61422), 17495 states have internal predecessors, (61422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:06,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17496 states to 17496 states and 61422 transitions. [2021-06-05 16:57:06,665 INFO L78 Accepts]: Start accepts. Automaton has 17496 states and 61422 transitions. Word has length 36 [2021-06-05 16:57:06,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:06,665 INFO L482 AbstractCegarLoop]: Abstraction has 17496 states and 61422 transitions. [2021-06-05 16:57:06,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:06,665 INFO L276 IsEmpty]: Start isEmpty. Operand 17496 states and 61422 transitions. [2021-06-05 16:57:06,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:57:06,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:06,689 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:06,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:06,890 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:06,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:06,890 INFO L82 PathProgramCache]: Analyzing trace with hash -703642812, now seen corresponding path program 122 times [2021-06-05 16:57:06,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:06,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894279140] [2021-06-05 16:57:06,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:06,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:06,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894279140] [2021-06-05 16:57:06,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894279140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:06,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025936004] [2021-06-05 16:57:06,945 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 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 16:57:06,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:06,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:06,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:57:06,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:57:07,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025936004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:07,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:07,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 16:57:07,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211762482] [2021-06-05 16:57:07,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:57:07,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:07,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:57:07,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:57:07,116 INFO L87 Difference]: Start difference. First operand 17496 states and 61422 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:08,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:08,350 INFO L93 Difference]: Finished difference Result 39068 states and 130518 transitions. [2021-06-05 16:57:08,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 16:57:08,350 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:57:08,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:08,418 INFO L225 Difference]: With dead ends: 39068 [2021-06-05 16:57:08,418 INFO L226 Difference]: Without dead ends: 39068 [2021-06-05 16:57:08,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 655.0ms TimeCoverageRelationStatistics Valid=1170, Invalid=3660, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:57:08,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39068 states. [2021-06-05 16:57:08,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39068 to 17040. [2021-06-05 16:57:08,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17040 states, 17039 states have (on average 3.4929866776219263) internal successors, (59517), 17039 states have internal predecessors, (59517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:08,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17040 states to 17040 states and 59517 transitions. [2021-06-05 16:57:08,905 INFO L78 Accepts]: Start accepts. Automaton has 17040 states and 59517 transitions. Word has length 36 [2021-06-05 16:57:08,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:08,905 INFO L482 AbstractCegarLoop]: Abstraction has 17040 states and 59517 transitions. [2021-06-05 16:57:08,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:08,906 INFO L276 IsEmpty]: Start isEmpty. Operand 17040 states and 59517 transitions. [2021-06-05 16:57:08,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:57:08,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:08,928 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:09,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:09,129 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:09,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:09,129 INFO L82 PathProgramCache]: Analyzing trace with hash 444490688, now seen corresponding path program 123 times [2021-06-05 16:57:09,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:09,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907483548] [2021-06-05 16:57:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:09,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:09,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907483548] [2021-06-05 16:57:09,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907483548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:09,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876571225] [2021-06-05 16:57:09,188 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 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 16:57:09,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:57:09,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:09,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:57:09,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:57:09,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876571225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:09,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:09,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 16:57:09,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206087705] [2021-06-05 16:57:09,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:57:09,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:09,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:57:09,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:57:09,345 INFO L87 Difference]: Start difference. First operand 17040 states and 59517 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:10,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:10,248 INFO L93 Difference]: Finished difference Result 35719 states and 119509 transitions. [2021-06-05 16:57:10,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:57:10,248 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:57:10,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:10,311 INFO L225 Difference]: With dead ends: 35719 [2021-06-05 16:57:10,311 INFO L226 Difference]: Without dead ends: 35719 [2021-06-05 16:57:10,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 478.3ms TimeCoverageRelationStatistics Valid=703, Invalid=2377, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:57:10,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35719 states. [2021-06-05 16:57:10,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35719 to 16855. [2021-06-05 16:57:10,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16855 states, 16854 states have (on average 3.483683398599739) internal successors, (58714), 16854 states have internal predecessors, (58714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16855 states to 16855 states and 58714 transitions. [2021-06-05 16:57:10,855 INFO L78 Accepts]: Start accepts. Automaton has 16855 states and 58714 transitions. Word has length 36 [2021-06-05 16:57:10,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:10,855 INFO L482 AbstractCegarLoop]: Abstraction has 16855 states and 58714 transitions. [2021-06-05 16:57:10,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:10,855 INFO L276 IsEmpty]: Start isEmpty. Operand 16855 states and 58714 transitions. [2021-06-05 16:57:10,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:57:10,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:10,877 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:11,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:11,078 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:11,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:11,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1078249612, now seen corresponding path program 124 times [2021-06-05 16:57:11,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:11,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634135560] [2021-06-05 16:57:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:11,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:11,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634135560] [2021-06-05 16:57:11,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634135560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:11,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894852160] [2021-06-05 16:57:11,126 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 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 16:57:11,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:11,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:11,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:57:11,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:57:11,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894852160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:11,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:11,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 16:57:11,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082851646] [2021-06-05 16:57:11,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:57:11,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:11,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:57:11,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:57:11,279 INFO L87 Difference]: Start difference. First operand 16855 states and 58714 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:11,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:11,967 INFO L93 Difference]: Finished difference Result 34570 states and 115444 transitions. [2021-06-05 16:57:11,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:57:11,967 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:57:11,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:12,024 INFO L225 Difference]: With dead ends: 34570 [2021-06-05 16:57:12,024 INFO L226 Difference]: Without dead ends: 34570 [2021-06-05 16:57:12,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 387.8ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:57:12,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34570 states. [2021-06-05 16:57:12,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34570 to 16873. [2021-06-05 16:57:12,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16873 states, 16872 states have (on average 3.4834637268847795) internal successors, (58773), 16872 states have internal predecessors, (58773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16873 states to 16873 states and 58773 transitions. [2021-06-05 16:57:12,457 INFO L78 Accepts]: Start accepts. Automaton has 16873 states and 58773 transitions. Word has length 36 [2021-06-05 16:57:12,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:12,457 INFO L482 AbstractCegarLoop]: Abstraction has 16873 states and 58773 transitions. [2021-06-05 16:57:12,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:12,457 INFO L276 IsEmpty]: Start isEmpty. Operand 16873 states and 58773 transitions. [2021-06-05 16:57:12,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:57:12,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:12,480 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:12,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 16:57:12,680 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:12,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:12,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1249008814, now seen corresponding path program 125 times [2021-06-05 16:57:12,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:12,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530784691] [2021-06-05 16:57:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:12,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:12,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530784691] [2021-06-05 16:57:12,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530784691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:12,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031660689] [2021-06-05 16:57:12,746 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 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 16:57:12,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 16:57:12,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:12,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:57:12,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:57:12,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031660689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:12,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:12,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 16:57:12,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176713063] [2021-06-05 16:57:12,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:57:12,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:12,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:57:12,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:57:12,900 INFO L87 Difference]: Start difference. First operand 16873 states and 58773 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:14,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:14,860 INFO L93 Difference]: Finished difference Result 36187 states and 119134 transitions. [2021-06-05 16:57:14,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-05 16:57:14,861 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:57:14,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:14,926 INFO L225 Difference]: With dead ends: 36187 [2021-06-05 16:57:14,926 INFO L226 Difference]: Without dead ends: 36183 [2021-06-05 16:57:14,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4706 ImplicationChecksByTransitivity, 1229.7ms TimeCoverageRelationStatistics Valid=2270, Invalid=10612, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 16:57:14,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36183 states. [2021-06-05 16:57:15,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36183 to 17057. [2021-06-05 16:57:15,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17057 states, 17056 states have (on average 3.480593339587242) internal successors, (59365), 17056 states have internal predecessors, (59365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:15,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17057 states to 17057 states and 59365 transitions. [2021-06-05 16:57:15,381 INFO L78 Accepts]: Start accepts. Automaton has 17057 states and 59365 transitions. Word has length 36 [2021-06-05 16:57:15,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:15,381 INFO L482 AbstractCegarLoop]: Abstraction has 17057 states and 59365 transitions. [2021-06-05 16:57:15,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:15,381 INFO L276 IsEmpty]: Start isEmpty. Operand 17057 states and 59365 transitions. [2021-06-05 16:57:15,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:57:15,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:15,404 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:15,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:15,604 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:15,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:15,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1793730568, now seen corresponding path program 126 times [2021-06-05 16:57:15,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:15,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136853599] [2021-06-05 16:57:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:15,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:15,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136853599] [2021-06-05 16:57:15,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136853599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:15,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262736213] [2021-06-05 16:57:15,654 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 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 16:57:15,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:57:15,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:15,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:57:15,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:57:15,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262736213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:15,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:15,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 16:57:15,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000432156] [2021-06-05 16:57:15,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:57:15,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:15,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:57:15,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:57:15,889 INFO L87 Difference]: Start difference. First operand 17057 states and 59365 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:17,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:17,962 INFO L93 Difference]: Finished difference Result 38126 states and 127134 transitions. [2021-06-05 16:57:17,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-06-05 16:57:17,963 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:57:17,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:18,032 INFO L225 Difference]: With dead ends: 38126 [2021-06-05 16:57:18,032 INFO L226 Difference]: Without dead ends: 38126 [2021-06-05 16:57:18,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5730 ImplicationChecksByTransitivity, 1300.2ms TimeCoverageRelationStatistics Valid=2664, Invalid=11856, Unknown=0, NotChecked=0, Total=14520 [2021-06-05 16:57:18,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38126 states. [2021-06-05 16:57:18,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38126 to 17565. [2021-06-05 16:57:18,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17565 states, 17564 states have (on average 3.4988613072193124) internal successors, (61454), 17564 states have internal predecessors, (61454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:18,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17565 states to 17565 states and 61454 transitions. [2021-06-05 16:57:18,519 INFO L78 Accepts]: Start accepts. Automaton has 17565 states and 61454 transitions. Word has length 36 [2021-06-05 16:57:18,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:18,519 INFO L482 AbstractCegarLoop]: Abstraction has 17565 states and 61454 transitions. [2021-06-05 16:57:18,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:18,519 INFO L276 IsEmpty]: Start isEmpty. Operand 17565 states and 61454 transitions. [2021-06-05 16:57:18,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:57:18,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:18,543 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:18,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 16:57:18,743 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:18,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:18,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1809191364, now seen corresponding path program 127 times [2021-06-05 16:57:18,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:18,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436396787] [2021-06-05 16:57:18,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:18,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:18,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436396787] [2021-06-05 16:57:18,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436396787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:18,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957254166] [2021-06-05 16:57:18,792 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 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 16:57:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:18,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:57:18,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:57:18,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957254166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:18,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:18,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 16:57:18,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630018595] [2021-06-05 16:57:18,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:57:18,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:18,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:57:18,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:57:18,958 INFO L87 Difference]: Start difference. First operand 17565 states and 61454 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:19,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:19,840 INFO L93 Difference]: Finished difference Result 35670 states and 119988 transitions. [2021-06-05 16:57:19,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:57:19,840 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:57:19,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:19,909 INFO L225 Difference]: With dead ends: 35670 [2021-06-05 16:57:19,909 INFO L226 Difference]: Without dead ends: 35670 [2021-06-05 16:57:19,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 460.4ms TimeCoverageRelationStatistics Valid=748, Invalid=2222, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:57:19,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35670 states. [2021-06-05 16:57:20,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35670 to 17384. [2021-06-05 16:57:20,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17384 states, 17383 states have (on average 3.49122706092159) internal successors, (60688), 17383 states have internal predecessors, (60688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:20,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17384 states to 17384 states and 60688 transitions. [2021-06-05 16:57:20,393 INFO L78 Accepts]: Start accepts. Automaton has 17384 states and 60688 transitions. Word has length 36 [2021-06-05 16:57:20,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:20,393 INFO L482 AbstractCegarLoop]: Abstraction has 17384 states and 60688 transitions. [2021-06-05 16:57:20,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:20,393 INFO L276 IsEmpty]: Start isEmpty. Operand 17384 states and 60688 transitions. [2021-06-05 16:57:20,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:57:20,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:20,417 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:20,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 16:57:20,617 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:20,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:20,617 INFO L82 PathProgramCache]: Analyzing trace with hash -530582264, now seen corresponding path program 128 times [2021-06-05 16:57:20,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:20,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143731674] [2021-06-05 16:57:20,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:20,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:20,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143731674] [2021-06-05 16:57:20,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143731674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:20,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773755323] [2021-06-05 16:57:20,763 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 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 16:57:20,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:20,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:20,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:57:20,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:57:20,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773755323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:20,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:20,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-05 16:57:20,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758531340] [2021-06-05 16:57:20,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:57:20,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:20,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:57:20,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:57:20,929 INFO L87 Difference]: Start difference. First operand 17384 states and 60688 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:24,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:24,082 INFO L93 Difference]: Finished difference Result 54535 states and 178905 transitions. [2021-06-05 16:57:24,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-06-05 16:57:24,082 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:57:24,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:24,192 INFO L225 Difference]: With dead ends: 54535 [2021-06-05 16:57:24,192 INFO L226 Difference]: Without dead ends: 54535 [2021-06-05 16:57:24,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12884 ImplicationChecksByTransitivity, 2368.7ms TimeCoverageRelationStatistics Valid=5153, Invalid=24603, Unknown=0, NotChecked=0, Total=29756 [2021-06-05 16:57:24,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54535 states. [2021-06-05 16:57:24,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54535 to 23450. [2021-06-05 16:57:24,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23450 states, 23449 states have (on average 3.4936671073393324) internal successors, (81923), 23449 states have internal predecessors, (81923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:24,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23450 states to 23450 states and 81923 transitions. [2021-06-05 16:57:24,911 INFO L78 Accepts]: Start accepts. Automaton has 23450 states and 81923 transitions. Word has length 36 [2021-06-05 16:57:24,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:24,911 INFO L482 AbstractCegarLoop]: Abstraction has 23450 states and 81923 transitions. [2021-06-05 16:57:24,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:24,911 INFO L276 IsEmpty]: Start isEmpty. Operand 23450 states and 81923 transitions. [2021-06-05 16:57:24,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:57:24,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:24,941 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:25,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 16:57:25,142 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:25,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:25,142 INFO L82 PathProgramCache]: Analyzing trace with hash 2079713946, now seen corresponding path program 129 times [2021-06-05 16:57:25,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:25,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992429695] [2021-06-05 16:57:25,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:25,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:25,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992429695] [2021-06-05 16:57:25,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992429695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:25,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981096922] [2021-06-05 16:57:25,200 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 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 16:57:25,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:57:25,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:25,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:57:25,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:25,359 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 16:57:25,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:25,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:25,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:25,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 16:57:25,414 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-06-05 16:57:25,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 16:57:25,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:25,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:25,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:25,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 16:57:25,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:25,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:25,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:25,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-06-05 16:57:25,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:25,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:25,487 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 16:57:25,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-06-05 16:57:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:57:25,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981096922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:25,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:25,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 16:57:25,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786087450] [2021-06-05 16:57:25,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:57:25,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:25,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:57:25,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:57:25,578 INFO L87 Difference]: Start difference. First operand 23450 states and 81923 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:28,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:28,657 INFO L93 Difference]: Finished difference Result 43833 states and 145969 transitions. [2021-06-05 16:57:28,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-06-05 16:57:28,657 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:57:28,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:28,747 INFO L225 Difference]: With dead ends: 43833 [2021-06-05 16:57:28,747 INFO L226 Difference]: Without dead ends: 43801 [2021-06-05 16:57:28,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6349 ImplicationChecksByTransitivity, 2325.1ms TimeCoverageRelationStatistics Valid=2492, Invalid=14278, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 16:57:28,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43801 states. [2021-06-05 16:57:29,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43801 to 24220. [2021-06-05 16:57:29,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24220 states, 24219 states have (on average 3.4956852058301333) internal successors, (84662), 24219 states have internal predecessors, (84662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:29,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24220 states to 24220 states and 84662 transitions. [2021-06-05 16:57:29,426 INFO L78 Accepts]: Start accepts. Automaton has 24220 states and 84662 transitions. Word has length 36 [2021-06-05 16:57:29,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:29,426 INFO L482 AbstractCegarLoop]: Abstraction has 24220 states and 84662 transitions. [2021-06-05 16:57:29,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:29,426 INFO L276 IsEmpty]: Start isEmpty. Operand 24220 states and 84662 transitions. [2021-06-05 16:57:29,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:57:29,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:29,460 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:29,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:29,660 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:29,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:29,661 INFO L82 PathProgramCache]: Analyzing trace with hash -408762388, now seen corresponding path program 130 times [2021-06-05 16:57:29,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:29,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480275767] [2021-06-05 16:57:29,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:29,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:29,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480275767] [2021-06-05 16:57:29,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480275767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:29,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804563295] [2021-06-05 16:57:29,702 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 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 16:57:29,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:29,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:29,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:57:29,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:57:29,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804563295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:29,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:29,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 16:57:29,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525248806] [2021-06-05 16:57:29,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:57:29,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:29,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:57:29,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:57:29,898 INFO L87 Difference]: Start difference. First operand 24220 states and 84662 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:32,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:32,269 INFO L93 Difference]: Finished difference Result 58769 states and 199442 transitions. [2021-06-05 16:57:32,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-06-05 16:57:32,269 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:57:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:32,385 INFO L225 Difference]: With dead ends: 58769 [2021-06-05 16:57:32,386 INFO L226 Difference]: Without dead ends: 58705 [2021-06-05 16:57:32,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6795 ImplicationChecksByTransitivity, 1488.6ms TimeCoverageRelationStatistics Valid=2796, Invalid=13716, Unknown=0, NotChecked=0, Total=16512 [2021-06-05 16:57:32,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58705 states. [2021-06-05 16:57:33,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58705 to 25245. [2021-06-05 16:57:33,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25245 states, 25244 states have (on average 3.517627951196324) internal successors, (88799), 25244 states have internal predecessors, (88799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:33,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25245 states to 25245 states and 88799 transitions. [2021-06-05 16:57:33,160 INFO L78 Accepts]: Start accepts. Automaton has 25245 states and 88799 transitions. Word has length 36 [2021-06-05 16:57:33,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:33,160 INFO L482 AbstractCegarLoop]: Abstraction has 25245 states and 88799 transitions. [2021-06-05 16:57:33,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:33,161 INFO L276 IsEmpty]: Start isEmpty. Operand 25245 states and 88799 transitions. [2021-06-05 16:57:33,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:57:33,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:33,193 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:33,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 16:57:33,393 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:33,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:33,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1347426568, now seen corresponding path program 131 times [2021-06-05 16:57:33,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:33,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369414973] [2021-06-05 16:57:33,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:33,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:33,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369414973] [2021-06-05 16:57:33,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369414973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:33,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765399866] [2021-06-05 16:57:33,435 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 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 16:57:33,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:57:33,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:33,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:57:33,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:33,605 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:33,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765399866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:33,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:33,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 16:57:33,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354825440] [2021-06-05 16:57:33,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:57:33,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:33,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:57:33,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:57:33,606 INFO L87 Difference]: Start difference. First operand 25245 states and 88799 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:34,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:34,341 INFO L93 Difference]: Finished difference Result 57930 states and 199300 transitions. [2021-06-05 16:57:34,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:57:34,342 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:57:34,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:34,479 INFO L225 Difference]: With dead ends: 57930 [2021-06-05 16:57:34,479 INFO L226 Difference]: Without dead ends: 57930 [2021-06-05 16:57:34,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 295.3ms TimeCoverageRelationStatistics Valid=401, Invalid=1081, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:57:34,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57930 states. [2021-06-05 16:57:35,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57930 to 26000. [2021-06-05 16:57:35,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26000 states, 25999 states have (on average 3.5369821916227546) internal successors, (91958), 25999 states have internal predecessors, (91958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:35,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26000 states to 26000 states and 91958 transitions. [2021-06-05 16:57:35,345 INFO L78 Accepts]: Start accepts. Automaton has 26000 states and 91958 transitions. Word has length 36 [2021-06-05 16:57:35,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:35,346 INFO L482 AbstractCegarLoop]: Abstraction has 26000 states and 91958 transitions. [2021-06-05 16:57:35,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:35,346 INFO L276 IsEmpty]: Start isEmpty. Operand 26000 states and 91958 transitions. [2021-06-05 16:57:35,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:57:35,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:35,377 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:35,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:35,585 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:35,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:35,585 INFO L82 PathProgramCache]: Analyzing trace with hash 339853380, now seen corresponding path program 132 times [2021-06-05 16:57:35,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:35,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542696445] [2021-06-05 16:57:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:35,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:35,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:35,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542696445] [2021-06-05 16:57:35,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542696445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:35,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583379767] [2021-06-05 16:57:35,626 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 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 16:57:35,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:57:35,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:35,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:57:35,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:35,924 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:57:35,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583379767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:35,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:35,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 16:57:35,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201524448] [2021-06-05 16:57:35,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:57:35,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:35,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:57:35,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:57:35,924 INFO L87 Difference]: Start difference. First operand 26000 states and 91958 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:38,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:38,214 INFO L93 Difference]: Finished difference Result 60488 states and 206164 transitions. [2021-06-05 16:57:38,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-06-05 16:57:38,215 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:57:38,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:38,351 INFO L225 Difference]: With dead ends: 60488 [2021-06-05 16:57:38,351 INFO L226 Difference]: Without dead ends: 60488 [2021-06-05 16:57:38,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6645 ImplicationChecksByTransitivity, 1602.4ms TimeCoverageRelationStatistics Valid=3256, Invalid=12746, Unknown=0, NotChecked=0, Total=16002 [2021-06-05 16:57:38,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60488 states. [2021-06-05 16:57:39,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60488 to 26680. [2021-06-05 16:57:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26680 states, 26679 states have (on average 3.5661756437647587) internal successors, (95142), 26679 states have internal predecessors, (95142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:39,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26680 states to 26680 states and 95142 transitions. [2021-06-05 16:57:39,270 INFO L78 Accepts]: Start accepts. Automaton has 26680 states and 95142 transitions. Word has length 36 [2021-06-05 16:57:39,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:39,270 INFO L482 AbstractCegarLoop]: Abstraction has 26680 states and 95142 transitions. [2021-06-05 16:57:39,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:39,270 INFO L276 IsEmpty]: Start isEmpty. Operand 26680 states and 95142 transitions. [2021-06-05 16:57:39,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:57:39,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:39,310 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:39,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:39,510 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:39,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:39,511 INFO L82 PathProgramCache]: Analyzing trace with hash -710764454, now seen corresponding path program 133 times [2021-06-05 16:57:39,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:39,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700180863] [2021-06-05 16:57:39,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:39,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:39,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700180863] [2021-06-05 16:57:39,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700180863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:39,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638868170] [2021-06-05 16:57:39,565 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 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 16:57:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:39,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:57:39,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:57:39,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638868170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:39,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:39,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:57:39,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030787839] [2021-06-05 16:57:39,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:57:39,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:39,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:57:39,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:57:39,714 INFO L87 Difference]: Start difference. First operand 26680 states and 95142 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:41,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:41,166 INFO L93 Difference]: Finished difference Result 57569 states and 197823 transitions. [2021-06-05 16:57:41,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 16:57:41,166 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:57:41,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:41,285 INFO L225 Difference]: With dead ends: 57569 [2021-06-05 16:57:41,285 INFO L226 Difference]: Without dead ends: 57521 [2021-06-05 16:57:41,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2543 ImplicationChecksByTransitivity, 878.5ms TimeCoverageRelationStatistics Valid=1427, Invalid=5379, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 16:57:41,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57521 states. [2021-06-05 16:57:41,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57521 to 26690. [2021-06-05 16:57:42,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26690 states, 26689 states have (on average 3.5660009741841208) internal successors, (95173), 26689 states have internal predecessors, (95173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:42,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26690 states to 26690 states and 95173 transitions. [2021-06-05 16:57:42,078 INFO L78 Accepts]: Start accepts. Automaton has 26690 states and 95173 transitions. Word has length 36 [2021-06-05 16:57:42,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:42,078 INFO L482 AbstractCegarLoop]: Abstraction has 26690 states and 95173 transitions. [2021-06-05 16:57:42,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:42,078 INFO L276 IsEmpty]: Start isEmpty. Operand 26690 states and 95173 transitions. [2021-06-05 16:57:42,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:57:42,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:42,117 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:42,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-06-05 16:57:42,317 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:42,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:42,317 INFO L82 PathProgramCache]: Analyzing trace with hash 329516758, now seen corresponding path program 134 times [2021-06-05 16:57:42,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:42,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20656731] [2021-06-05 16:57:42,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:42,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:42,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20656731] [2021-06-05 16:57:42,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20656731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:42,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079396740] [2021-06-05 16:57:42,365 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 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 16:57:42,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:42,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:42,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:57:42,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:42,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079396740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:42,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:42,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 16:57:42,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731293873] [2021-06-05 16:57:42,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:57:42,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:42,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:57:42,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:57:42,522 INFO L87 Difference]: Start difference. First operand 26690 states and 95173 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:43,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:43,241 INFO L93 Difference]: Finished difference Result 57984 states and 198618 transitions. [2021-06-05 16:57:43,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:57:43,241 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:57:43,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:43,363 INFO L225 Difference]: With dead ends: 57984 [2021-06-05 16:57:43,363 INFO L226 Difference]: Without dead ends: 57984 [2021-06-05 16:57:43,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 311.2ms TimeCoverageRelationStatistics Valid=474, Invalid=1248, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:57:43,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57984 states. [2021-06-05 16:57:44,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57984 to 27762. [2021-06-05 16:57:44,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27762 states, 27761 states have (on average 3.5949353409459315) internal successors, (99799), 27761 states have internal predecessors, (99799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:44,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27762 states to 27762 states and 99799 transitions. [2021-06-05 16:57:44,449 INFO L78 Accepts]: Start accepts. Automaton has 27762 states and 99799 transitions. Word has length 36 [2021-06-05 16:57:44,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:44,449 INFO L482 AbstractCegarLoop]: Abstraction has 27762 states and 99799 transitions. [2021-06-05 16:57:44,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:44,449 INFO L276 IsEmpty]: Start isEmpty. Operand 27762 states and 99799 transitions. [2021-06-05 16:57:44,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:57:44,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:44,489 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:44,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:44,689 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:44,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:44,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1122382768, now seen corresponding path program 135 times [2021-06-05 16:57:44,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:44,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817555483] [2021-06-05 16:57:44,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:44,844 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 16:57:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:57:44,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:44,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817555483] [2021-06-05 16:57:44,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817555483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:44,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731207025] [2021-06-05 16:57:44,871 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 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 16:57:44,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:57:44,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:44,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:57:44,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:45,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731207025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:45,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:45,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 18 [2021-06-05 16:57:45,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122285133] [2021-06-05 16:57:45,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:57:45,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:45,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:57:45,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:57:45,004 INFO L87 Difference]: Start difference. First operand 27762 states and 99799 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:45,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:45,993 INFO L93 Difference]: Finished difference Result 54138 states and 184921 transitions. [2021-06-05 16:57:45,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 16:57:45,996 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:57:45,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:46,111 INFO L225 Difference]: With dead ends: 54138 [2021-06-05 16:57:46,111 INFO L226 Difference]: Without dead ends: 54066 [2021-06-05 16:57:46,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 689.3ms TimeCoverageRelationStatistics Valid=855, Invalid=3435, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:57:46,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54066 states. [2021-06-05 16:57:46,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54066 to 27784. [2021-06-05 16:57:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27784 states, 27783 states have (on average 3.5943562610229276) internal successors, (99862), 27783 states have internal predecessors, (99862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27784 states to 27784 states and 99862 transitions. [2021-06-05 16:57:46,903 INFO L78 Accepts]: Start accepts. Automaton has 27784 states and 99862 transitions. Word has length 36 [2021-06-05 16:57:46,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:46,903 INFO L482 AbstractCegarLoop]: Abstraction has 27784 states and 99862 transitions. [2021-06-05 16:57:46,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 27784 states and 99862 transitions. [2021-06-05 16:57:46,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:57:46,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:46,943 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:47,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:47,151 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:47,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:47,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1700283596, now seen corresponding path program 136 times [2021-06-05 16:57:47,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:47,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451605752] [2021-06-05 16:57:47,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:57:47,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:47,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451605752] [2021-06-05 16:57:47,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451605752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:47,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449019529] [2021-06-05 16:57:47,200 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 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 16:57:47,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:47,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:47,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:57:47,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:57:47,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449019529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:47,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:47,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:57:47,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470763680] [2021-06-05 16:57:47,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:57:47,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:47,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:57:47,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:57:47,355 INFO L87 Difference]: Start difference. First operand 27784 states and 99862 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:49,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:49,341 INFO L93 Difference]: Finished difference Result 59804 states and 200815 transitions. [2021-06-05 16:57:49,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-05 16:57:49,341 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:57:49,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:49,482 INFO L225 Difference]: With dead ends: 59804 [2021-06-05 16:57:49,482 INFO L226 Difference]: Without dead ends: 59804 [2021-06-05 16:57:49,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5826 ImplicationChecksByTransitivity, 1205.2ms TimeCoverageRelationStatistics Valid=2466, Invalid=11576, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 16:57:49,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59804 states. [2021-06-05 16:57:50,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59804 to 27938. [2021-06-05 16:57:50,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27938 states, 27937 states have (on average 3.5910441350180764) internal successors, (100323), 27937 states have internal predecessors, (100323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:50,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27938 states to 27938 states and 100323 transitions. [2021-06-05 16:57:50,400 INFO L78 Accepts]: Start accepts. Automaton has 27938 states and 100323 transitions. Word has length 36 [2021-06-05 16:57:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:50,400 INFO L482 AbstractCegarLoop]: Abstraction has 27938 states and 100323 transitions. [2021-06-05 16:57:50,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:50,400 INFO L276 IsEmpty]: Start isEmpty. Operand 27938 states and 100323 transitions. [2021-06-05 16:57:50,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:57:50,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:50,441 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:50,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 16:57:50,642 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:50,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:50,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2038937164, now seen corresponding path program 137 times [2021-06-05 16:57:50,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:50,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612785286] [2021-06-05 16:57:50,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:50,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:50,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612785286] [2021-06-05 16:57:50,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612785286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:50,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624889709] [2021-06-05 16:57:50,695 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 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 16:57:50,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:57:50,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:50,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:57:50,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:50,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624889709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:50,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:50,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-06-05 16:57:50,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156026299] [2021-06-05 16:57:50,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:57:50,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:50,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:57:50,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:57:50,828 INFO L87 Difference]: Start difference. First operand 27938 states and 100323 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:52,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:52,197 INFO L93 Difference]: Finished difference Result 55738 states and 189163 transitions. [2021-06-05 16:57:52,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 16:57:52,198 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:57:52,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:52,322 INFO L225 Difference]: With dead ends: 55738 [2021-06-05 16:57:52,322 INFO L226 Difference]: Without dead ends: 55594 [2021-06-05 16:57:52,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 740.2ms TimeCoverageRelationStatistics Valid=1122, Invalid=4884, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 16:57:52,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55594 states. [2021-06-05 16:57:53,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55594 to 27966. [2021-06-05 16:57:53,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27966 states, 27965 states have (on average 3.5902377972465582) internal successors, (100401), 27965 states have internal predecessors, (100401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:53,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27966 states to 27966 states and 100401 transitions. [2021-06-05 16:57:53,130 INFO L78 Accepts]: Start accepts. Automaton has 27966 states and 100401 transitions. Word has length 36 [2021-06-05 16:57:53,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:53,130 INFO L482 AbstractCegarLoop]: Abstraction has 27966 states and 100401 transitions. [2021-06-05 16:57:53,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:53,131 INFO L276 IsEmpty]: Start isEmpty. Operand 27966 states and 100401 transitions. [2021-06-05 16:57:53,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:57:53,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:53,170 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:53,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 16:57:53,370 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:53,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:53,370 INFO L82 PathProgramCache]: Analyzing trace with hash -201981896, now seen corresponding path program 138 times [2021-06-05 16:57:53,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:53,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539543446] [2021-06-05 16:57:53,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:53,419 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:53,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:53,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539543446] [2021-06-05 16:57:53,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539543446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:53,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707189088] [2021-06-05 16:57:53,419 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:53,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:57:53,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:53,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:57:53,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:57:53,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707189088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:53,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:53,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 16:57:53,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70968751] [2021-06-05 16:57:53,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:57:53,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:53,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:57:53,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:57:53,551 INFO L87 Difference]: Start difference. First operand 27966 states and 100401 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:55,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:55,265 INFO L93 Difference]: Finished difference Result 58306 states and 196728 transitions. [2021-06-05 16:57:55,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 16:57:55,265 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:57:55,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:55,389 INFO L225 Difference]: With dead ends: 58306 [2021-06-05 16:57:55,390 INFO L226 Difference]: Without dead ends: 58238 [2021-06-05 16:57:55,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3796 ImplicationChecksByTransitivity, 1003.4ms TimeCoverageRelationStatistics Valid=1816, Invalid=7886, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 16:57:55,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58238 states. [2021-06-05 16:57:56,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58238 to 28222. [2021-06-05 16:57:56,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28222 states, 28221 states have (on average 3.5836788207363313) internal successors, (101135), 28221 states have internal predecessors, (101135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:56,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28222 states to 28222 states and 101135 transitions. [2021-06-05 16:57:56,191 INFO L78 Accepts]: Start accepts. Automaton has 28222 states and 101135 transitions. Word has length 36 [2021-06-05 16:57:56,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:56,191 INFO L482 AbstractCegarLoop]: Abstraction has 28222 states and 101135 transitions. [2021-06-05 16:57:56,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:56,191 INFO L276 IsEmpty]: Start isEmpty. Operand 28222 states and 101135 transitions. [2021-06-05 16:57:56,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:57:56,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:56,233 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:56,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 16:57:56,433 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:56,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:56,434 INFO L82 PathProgramCache]: Analyzing trace with hash 838299316, now seen corresponding path program 139 times [2021-06-05 16:57:56,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:56,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240443013] [2021-06-05 16:57:56,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:56,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:56,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240443013] [2021-06-05 16:57:56,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240443013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:56,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176245134] [2021-06-05 16:57:56,484 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:56,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:56,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:57:56,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:56,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176245134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:56,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:56,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-06-05 16:57:56,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235397006] [2021-06-05 16:57:56,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:57:56,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:56,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:57:56,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:57:56,612 INFO L87 Difference]: Start difference. First operand 28222 states and 101135 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:57,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:57,614 INFO L93 Difference]: Finished difference Result 58747 states and 196828 transitions. [2021-06-05 16:57:57,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:57:57,614 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:57:57,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:57,742 INFO L225 Difference]: With dead ends: 58747 [2021-06-05 16:57:57,742 INFO L226 Difference]: Without dead ends: 58747 [2021-06-05 16:57:57,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 523.1ms TimeCoverageRelationStatistics Valid=896, Invalid=2886, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:57:57,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58747 states. [2021-06-05 16:57:58,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58747 to 28292. [2021-06-05 16:57:58,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28292 states, 28291 states have (on average 3.583259693895585) internal successors, (101374), 28291 states have internal predecessors, (101374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:58,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28292 states to 28292 states and 101374 transitions. [2021-06-05 16:57:58,722 INFO L78 Accepts]: Start accepts. Automaton has 28292 states and 101374 transitions. Word has length 36 [2021-06-05 16:57:58,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:58,722 INFO L482 AbstractCegarLoop]: Abstraction has 28292 states and 101374 transitions. [2021-06-05 16:57:58,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:58,722 INFO L276 IsEmpty]: Start isEmpty. Operand 28292 states and 101374 transitions. [2021-06-05 16:57:58,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:57:58,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:58,765 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:58,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:58,966 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:58,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:58,966 INFO L82 PathProgramCache]: Analyzing trace with hash 769453752, now seen corresponding path program 140 times [2021-06-05 16:57:58,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:58,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683510158] [2021-06-05 16:57:58,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:59,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:59,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683510158] [2021-06-05 16:57:59,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683510158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:59,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879250269] [2021-06-05 16:57:59,024 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:59,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:59,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:59,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:57:59,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:57:59,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879250269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:59,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:59,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-06-05 16:57:59,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760610595] [2021-06-05 16:57:59,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:57:59,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:59,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:57:59,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:57:59,151 INFO L87 Difference]: Start difference. First operand 28292 states and 101374 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:00,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:00,789 INFO L93 Difference]: Finished difference Result 58143 states and 196081 transitions. [2021-06-05 16:58:00,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 16:58:00,789 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:58:00,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:00,907 INFO L225 Difference]: With dead ends: 58143 [2021-06-05 16:58:00,907 INFO L226 Difference]: Without dead ends: 57927 [2021-06-05 16:58:00,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 941.1ms TimeCoverageRelationStatistics Valid=1531, Invalid=7211, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 16:58:00,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57927 states. [2021-06-05 16:58:01,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57927 to 28406. [2021-06-05 16:58:01,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28406 states, 28405 states have (on average 3.5803907762717833) internal successors, (101701), 28405 states have internal predecessors, (101701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28406 states to 28406 states and 101701 transitions. [2021-06-05 16:58:01,735 INFO L78 Accepts]: Start accepts. Automaton has 28406 states and 101701 transitions. Word has length 36 [2021-06-05 16:58:01,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:01,735 INFO L482 AbstractCegarLoop]: Abstraction has 28406 states and 101701 transitions. [2021-06-05 16:58:01,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:01,735 INFO L276 IsEmpty]: Start isEmpty. Operand 28406 states and 101701 transitions. [2021-06-05 16:58:01,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:58:01,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:01,775 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:01,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 16:58:01,975 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:01,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:01,975 INFO L82 PathProgramCache]: Analyzing trace with hash 851907644, now seen corresponding path program 141 times [2021-06-05 16:58:01,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:01,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492065008] [2021-06-05 16:58:01,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:02,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:02,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492065008] [2021-06-05 16:58:02,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492065008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:02,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209217480] [2021-06-05 16:58:02,032 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:02,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:58:02,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:02,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:58:02,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:02,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209217480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:02,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:02,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 16:58:02,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429716500] [2021-06-05 16:58:02,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:58:02,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:02,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:58:02,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:58:02,147 INFO L87 Difference]: Start difference. First operand 28406 states and 101701 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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 16:58:03,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:03,881 INFO L93 Difference]: Finished difference Result 56244 states and 191794 transitions. [2021-06-05 16:58:03,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 16:58:03,881 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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 36 [2021-06-05 16:58:03,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:04,019 INFO L225 Difference]: With dead ends: 56244 [2021-06-05 16:58:04,019 INFO L226 Difference]: Without dead ends: 56088 [2021-06-05 16:58:04,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3741 ImplicationChecksByTransitivity, 1025.8ms TimeCoverageRelationStatistics Valid=1746, Invalid=8154, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 16:58:04,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56088 states. [2021-06-05 16:58:04,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56088 to 28858. [2021-06-05 16:58:04,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28858 states, 28857 states have (on average 3.5620819905049035) internal successors, (102791), 28857 states have internal predecessors, (102791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:04,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28858 states to 28858 states and 102791 transitions. [2021-06-05 16:58:04,951 INFO L78 Accepts]: Start accepts. Automaton has 28858 states and 102791 transitions. Word has length 36 [2021-06-05 16:58:04,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:04,951 INFO L482 AbstractCegarLoop]: Abstraction has 28858 states and 102791 transitions. [2021-06-05 16:58:04,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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 16:58:04,951 INFO L276 IsEmpty]: Start isEmpty. Operand 28858 states and 102791 transitions. [2021-06-05 16:58:04,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:58:04,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:04,992 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:05,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:05,192 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:05,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:05,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1657232324, now seen corresponding path program 142 times [2021-06-05 16:58:05,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:05,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630037361] [2021-06-05 16:58:05,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:05,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:05,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630037361] [2021-06-05 16:58:05,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630037361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:05,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307428386] [2021-06-05 16:58:05,250 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:05,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:58:05,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:05,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:58:05,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:05,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:58:05,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307428386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:05,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:05,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 16:58:05,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968649590] [2021-06-05 16:58:05,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:58:05,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:05,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:58:05,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:58:05,391 INFO L87 Difference]: Start difference. First operand 28858 states and 102791 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:08,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:08,227 INFO L93 Difference]: Finished difference Result 62328 states and 208262 transitions. [2021-06-05 16:58:08,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2021-06-05 16:58:08,227 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:58:08,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:08,352 INFO L225 Difference]: With dead ends: 62328 [2021-06-05 16:58:08,352 INFO L226 Difference]: Without dead ends: 62328 [2021-06-05 16:58:08,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10889 ImplicationChecksByTransitivity, 1829.5ms TimeCoverageRelationStatistics Valid=4101, Invalid=20705, Unknown=0, NotChecked=0, Total=24806 [2021-06-05 16:58:08,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62328 states. [2021-06-05 16:58:09,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62328 to 31970. [2021-06-05 16:58:09,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31970 states, 31969 states have (on average 3.5039882386061496) internal successors, (112019), 31969 states have internal predecessors, (112019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31970 states to 31970 states and 112019 transitions. [2021-06-05 16:58:09,267 INFO L78 Accepts]: Start accepts. Automaton has 31970 states and 112019 transitions. Word has length 36 [2021-06-05 16:58:09,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:09,268 INFO L482 AbstractCegarLoop]: Abstraction has 31970 states and 112019 transitions. [2021-06-05 16:58:09,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:09,268 INFO L276 IsEmpty]: Start isEmpty. Operand 31970 states and 112019 transitions. [2021-06-05 16:58:09,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:58:09,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:09,317 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:09,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:09,518 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:09,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:09,518 INFO L82 PathProgramCache]: Analyzing trace with hash 894177490, now seen corresponding path program 143 times [2021-06-05 16:58:09,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:09,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085095015] [2021-06-05 16:58:09,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:09,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:09,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085095015] [2021-06-05 16:58:09,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085095015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:09,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501275040] [2021-06-05 16:58:09,568 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:09,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:58:09,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:09,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:58:09,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:58:09,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501275040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:09,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:09,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 16:58:09,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017135382] [2021-06-05 16:58:09,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:58:09,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:09,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:58:09,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:58:09,719 INFO L87 Difference]: Start difference. First operand 31970 states and 112019 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:11,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:11,243 INFO L93 Difference]: Finished difference Result 58961 states and 202100 transitions. [2021-06-05 16:58:11,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 16:58:11,243 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:58:11,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:11,374 INFO L225 Difference]: With dead ends: 58961 [2021-06-05 16:58:11,374 INFO L226 Difference]: Without dead ends: 58937 [2021-06-05 16:58:11,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2552 ImplicationChecksByTransitivity, 856.3ms TimeCoverageRelationStatistics Valid=1411, Invalid=5561, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 16:58:11,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58937 states. [2021-06-05 16:58:12,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58937 to 33178. [2021-06-05 16:58:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33178 states, 33177 states have (on average 3.5047774060343007) internal successors, (116278), 33177 states have internal predecessors, (116278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:12,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33178 states to 33178 states and 116278 transitions. [2021-06-05 16:58:12,254 INFO L78 Accepts]: Start accepts. Automaton has 33178 states and 116278 transitions. Word has length 36 [2021-06-05 16:58:12,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:12,254 INFO L482 AbstractCegarLoop]: Abstraction has 33178 states and 116278 transitions. [2021-06-05 16:58:12,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:12,254 INFO L276 IsEmpty]: Start isEmpty. Operand 33178 states and 116278 transitions. [2021-06-05 16:58:12,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:58:12,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:12,297 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:12,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:12,498 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:12,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:12,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1472010922, now seen corresponding path program 144 times [2021-06-05 16:58:12,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:12,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567550055] [2021-06-05 16:58:12,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:12,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:12,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567550055] [2021-06-05 16:58:12,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567550055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:12,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923656341] [2021-06-05 16:58:12,549 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:12,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:58:12,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:12,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:58:12,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:12,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923656341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:12,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:12,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:58:12,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088513742] [2021-06-05 16:58:12,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:58:12,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:12,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:58:12,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:58:12,697 INFO L87 Difference]: Start difference. First operand 33178 states and 116278 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:14,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:14,061 INFO L93 Difference]: Finished difference Result 61380 states and 207685 transitions. [2021-06-05 16:58:14,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 16:58:14,062 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:58:14,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:14,192 INFO L225 Difference]: With dead ends: 61380 [2021-06-05 16:58:14,192 INFO L226 Difference]: Without dead ends: 61356 [2021-06-05 16:58:14,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2596 ImplicationChecksByTransitivity, 816.2ms TimeCoverageRelationStatistics Valid=1508, Invalid=5464, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 16:58:14,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61356 states. [2021-06-05 16:58:15,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61356 to 33587. [2021-06-05 16:58:15,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33587 states, 33586 states have (on average 3.5085750014887154) internal successors, (117839), 33586 states have internal predecessors, (117839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:15,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33587 states to 33587 states and 117839 transitions. [2021-06-05 16:58:15,234 INFO L78 Accepts]: Start accepts. Automaton has 33587 states and 117839 transitions. Word has length 36 [2021-06-05 16:58:15,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:15,234 INFO L482 AbstractCegarLoop]: Abstraction has 33587 states and 117839 transitions. [2021-06-05 16:58:15,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:15,234 INFO L276 IsEmpty]: Start isEmpty. Operand 33587 states and 117839 transitions. [2021-06-05 16:58:15,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:58:15,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:15,280 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:15,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:15,481 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:15,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:15,481 INFO L82 PathProgramCache]: Analyzing trace with hash 44374, now seen corresponding path program 145 times [2021-06-05 16:58:15,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:15,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569001893] [2021-06-05 16:58:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:15,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:15,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569001893] [2021-06-05 16:58:15,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569001893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:15,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098949898] [2021-06-05 16:58:15,529 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:15,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:58:15,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:58:15,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098949898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:15,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:15,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 16:58:15,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689046727] [2021-06-05 16:58:15,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:58:15,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:15,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:58:15,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:58:15,683 INFO L87 Difference]: Start difference. First operand 33587 states and 117839 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:17,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:17,525 INFO L93 Difference]: Finished difference Result 68170 states and 230143 transitions. [2021-06-05 16:58:17,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 16:58:17,525 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:58:17,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:17,676 INFO L225 Difference]: With dead ends: 68170 [2021-06-05 16:58:17,676 INFO L226 Difference]: Without dead ends: 68134 [2021-06-05 16:58:17,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4640 ImplicationChecksByTransitivity, 1187.3ms TimeCoverageRelationStatistics Valid=2536, Invalid=9236, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 16:58:17,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68134 states. [2021-06-05 16:58:18,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68134 to 33436. [2021-06-05 16:58:19,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33436 states, 33435 states have (on average 3.5040526394496783) internal successors, (117158), 33435 states have internal predecessors, (117158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33436 states to 33436 states and 117158 transitions. [2021-06-05 16:58:19,102 INFO L78 Accepts]: Start accepts. Automaton has 33436 states and 117158 transitions. Word has length 36 [2021-06-05 16:58:19,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:19,102 INFO L482 AbstractCegarLoop]: Abstraction has 33436 states and 117158 transitions. [2021-06-05 16:58:19,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:19,102 INFO L276 IsEmpty]: Start isEmpty. Operand 33436 states and 117158 transitions. [2021-06-05 16:58:19,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:58:19,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:19,147 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:19,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-06-05 16:58:19,347 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:19,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:19,348 INFO L82 PathProgramCache]: Analyzing trace with hash -988740176, now seen corresponding path program 146 times [2021-06-05 16:58:19,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:19,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713332869] [2021-06-05 16:58:19,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:19,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:19,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713332869] [2021-06-05 16:58:19,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713332869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:19,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368472972] [2021-06-05 16:58:19,408 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:19,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:19,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:19,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:58:19,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:58:19,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368472972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:19,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:19,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 16:58:19,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092887775] [2021-06-05 16:58:19,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:58:19,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:19,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:58:19,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:58:19,552 INFO L87 Difference]: Start difference. First operand 33436 states and 117158 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:21,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:21,231 INFO L93 Difference]: Finished difference Result 71028 states and 243828 transitions. [2021-06-05 16:58:21,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 16:58:21,231 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:58:21,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:21,387 INFO L225 Difference]: With dead ends: 71028 [2021-06-05 16:58:21,387 INFO L226 Difference]: Without dead ends: 70956 [2021-06-05 16:58:21,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3221 ImplicationChecksByTransitivity, 938.6ms TimeCoverageRelationStatistics Valid=1558, Invalid=7184, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 16:58:21,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70956 states. [2021-06-05 16:58:22,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70956 to 33879. [2021-06-05 16:58:22,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33879 states, 33878 states have (on average 3.507792667808017) internal successors, (118837), 33878 states have internal predecessors, (118837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:22,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33879 states to 33879 states and 118837 transitions. [2021-06-05 16:58:22,580 INFO L78 Accepts]: Start accepts. Automaton has 33879 states and 118837 transitions. Word has length 36 [2021-06-05 16:58:22,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:22,580 INFO L482 AbstractCegarLoop]: Abstraction has 33879 states and 118837 transitions. [2021-06-05 16:58:22,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:22,580 INFO L276 IsEmpty]: Start isEmpty. Operand 33879 states and 118837 transitions. [2021-06-05 16:58:22,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:58:22,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:22,644 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:22,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 16:58:22,845 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:22,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1272413260, now seen corresponding path program 147 times [2021-06-05 16:58:22,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:22,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927727550] [2021-06-05 16:58:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:22,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:22,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927727550] [2021-06-05 16:58:22,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927727550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:22,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193476143] [2021-06-05 16:58:22,905 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:22,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:58:22,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:22,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:58:22,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:23,040 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:23,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193476143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:23,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:23,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 16:58:23,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947824752] [2021-06-05 16:58:23,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:58:23,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:23,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:58:23,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:58:23,041 INFO L87 Difference]: Start difference. First operand 33879 states and 118837 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:24,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:24,873 INFO L93 Difference]: Finished difference Result 72468 states and 247783 transitions. [2021-06-05 16:58:24,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 16:58:24,873 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:58:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:25,040 INFO L225 Difference]: With dead ends: 72468 [2021-06-05 16:58:25,040 INFO L226 Difference]: Without dead ends: 72348 [2021-06-05 16:58:25,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3012 ImplicationChecksByTransitivity, 1042.4ms TimeCoverageRelationStatistics Valid=1503, Invalid=6869, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 16:58:25,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72348 states. [2021-06-05 16:58:26,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72348 to 36408. [2021-06-05 16:58:26,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36408 states, 36407 states have (on average 3.501606833850633) internal successors, (127483), 36407 states have internal predecessors, (127483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36408 states to 36408 states and 127483 transitions. [2021-06-05 16:58:26,238 INFO L78 Accepts]: Start accepts. Automaton has 36408 states and 127483 transitions. Word has length 36 [2021-06-05 16:58:26,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:26,238 INFO L482 AbstractCegarLoop]: Abstraction has 36408 states and 127483 transitions. [2021-06-05 16:58:26,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:26,238 INFO L276 IsEmpty]: Start isEmpty. Operand 36408 states and 127483 transitions. [2021-06-05 16:58:26,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:58:26,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:26,292 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:26,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 16:58:26,493 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:26,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:26,493 INFO L82 PathProgramCache]: Analyzing trace with hash 995659960, now seen corresponding path program 148 times [2021-06-05 16:58:26,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:26,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251787811] [2021-06-05 16:58:26,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:26,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:26,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251787811] [2021-06-05 16:58:26,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251787811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:26,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946325558] [2021-06-05 16:58:26,551 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:26,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:58:26,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:26,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:58:26,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:58:26,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946325558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:26,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:26,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 16:58:26,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011160430] [2021-06-05 16:58:26,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:58:26,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:26,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:58:26,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:58:26,676 INFO L87 Difference]: Start difference. First operand 36408 states and 127483 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:28,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:28,459 INFO L93 Difference]: Finished difference Result 71896 states and 245531 transitions. [2021-06-05 16:58:28,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 16:58:28,460 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:58:28,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:28,616 INFO L225 Difference]: With dead ends: 71896 [2021-06-05 16:58:28,616 INFO L226 Difference]: Without dead ends: 71728 [2021-06-05 16:58:28,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2683 ImplicationChecksByTransitivity, 900.3ms TimeCoverageRelationStatistics Valid=1382, Invalid=6274, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 16:58:28,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71728 states. [2021-06-05 16:58:29,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71728 to 37315. [2021-06-05 16:58:29,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37315 states, 37314 states have (on average 3.4974272391059658) internal successors, (130503), 37314 states have internal predecessors, (130503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37315 states to 37315 states and 130503 transitions. [2021-06-05 16:58:29,807 INFO L78 Accepts]: Start accepts. Automaton has 37315 states and 130503 transitions. Word has length 36 [2021-06-05 16:58:29,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:29,807 INFO L482 AbstractCegarLoop]: Abstraction has 37315 states and 130503 transitions. [2021-06-05 16:58:29,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:29,807 INFO L276 IsEmpty]: Start isEmpty. Operand 37315 states and 130503 transitions. [2021-06-05 16:58:29,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:58:29,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:29,860 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:30,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 16:58:30,061 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:30,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:30,061 INFO L82 PathProgramCache]: Analyzing trace with hash 652323388, now seen corresponding path program 149 times [2021-06-05 16:58:30,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:30,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402601002] [2021-06-05 16:58:30,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:30,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:30,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402601002] [2021-06-05 16:58:30,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402601002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:30,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365477577] [2021-06-05 16:58:30,106 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:30,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:58:30,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:30,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:58:30,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:30,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365477577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:30,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:30,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 16:58:30,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108325857] [2021-06-05 16:58:30,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:58:30,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:30,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:58:30,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:58:30,245 INFO L87 Difference]: Start difference. First operand 37315 states and 130503 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 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 16:58:32,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:32,432 INFO L93 Difference]: Finished difference Result 70630 states and 238604 transitions. [2021-06-05 16:58:32,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 16:58:32,433 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 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 36 [2021-06-05 16:58:32,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:32,582 INFO L225 Difference]: With dead ends: 70630 [2021-06-05 16:58:32,582 INFO L226 Difference]: Without dead ends: 70602 [2021-06-05 16:58:32,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 1302.0ms TimeCoverageRelationStatistics Valid=2360, Invalid=8770, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 16:58:32,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70602 states. [2021-06-05 16:58:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70602 to 37553. [2021-06-05 16:58:33,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37553 states, 37552 states have (on average 3.4914518534299104) internal successors, (131111), 37552 states have internal predecessors, (131111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:33,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37553 states to 37553 states and 131111 transitions. [2021-06-05 16:58:33,810 INFO L78 Accepts]: Start accepts. Automaton has 37553 states and 131111 transitions. Word has length 36 [2021-06-05 16:58:33,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:33,810 INFO L482 AbstractCegarLoop]: Abstraction has 37553 states and 131111 transitions. [2021-06-05 16:58:33,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 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 16:58:33,810 INFO L276 IsEmpty]: Start isEmpty. Operand 37553 states and 131111 transitions. [2021-06-05 16:58:33,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:58:33,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:33,861 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:34,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:34,061 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:34,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:34,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1629303304, now seen corresponding path program 150 times [2021-06-05 16:58:34,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:34,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2765769] [2021-06-05 16:58:34,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:34,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:34,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2765769] [2021-06-05 16:58:34,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2765769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:34,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056010975] [2021-06-05 16:58:34,108 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:34,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:58:34,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:34,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:58:34,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:34,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056010975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:34,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:34,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-06-05 16:58:34,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277191726] [2021-06-05 16:58:34,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:58:34,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:34,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:58:34,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:58:34,232 INFO L87 Difference]: Start difference. First operand 37553 states and 131111 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:35,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:35,859 INFO L93 Difference]: Finished difference Result 64800 states and 219489 transitions. [2021-06-05 16:58:35,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 16:58:35,860 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:58:35,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:36,008 INFO L225 Difference]: With dead ends: 64800 [2021-06-05 16:58:36,008 INFO L226 Difference]: Without dead ends: 64752 [2021-06-05 16:58:36,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2640 ImplicationChecksByTransitivity, 965.2ms TimeCoverageRelationStatistics Valid=1456, Invalid=5854, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 16:58:36,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64752 states. [2021-06-05 16:58:37,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64752 to 38003. [2021-06-05 16:58:37,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38003 states, 38002 states have (on average 3.4817641176780167) internal successors, (132314), 38002 states have internal predecessors, (132314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:37,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38003 states to 38003 states and 132314 transitions. [2021-06-05 16:58:37,288 INFO L78 Accepts]: Start accepts. Automaton has 38003 states and 132314 transitions. Word has length 36 [2021-06-05 16:58:37,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:37,288 INFO L482 AbstractCegarLoop]: Abstraction has 38003 states and 132314 transitions. [2021-06-05 16:58:37,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:37,289 INFO L276 IsEmpty]: Start isEmpty. Operand 38003 states and 132314 transitions. [2021-06-05 16:58:37,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:58:37,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:37,342 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:37,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:37,542 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:37,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:37,543 INFO L82 PathProgramCache]: Analyzing trace with hash -971366648, now seen corresponding path program 151 times [2021-06-05 16:58:37,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:37,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408145096] [2021-06-05 16:58:37,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:37,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:37,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408145096] [2021-06-05 16:58:37,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408145096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:37,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104353224] [2021-06-05 16:58:37,592 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:37,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:58:37,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:58:37,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104353224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:37,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:37,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 16:58:37,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049219579] [2021-06-05 16:58:37,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:58:37,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:37,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:58:37,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:58:37,705 INFO L87 Difference]: Start difference. First operand 38003 states and 132314 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:38,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:38,943 INFO L93 Difference]: Finished difference Result 62672 states and 214949 transitions. [2021-06-05 16:58:38,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:58:38,944 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:58:38,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:39,098 INFO L225 Difference]: With dead ends: 62672 [2021-06-05 16:58:39,098 INFO L226 Difference]: Without dead ends: 62612 [2021-06-05 16:58:39,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 591.7ms TimeCoverageRelationStatistics Valid=939, Invalid=3891, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:58:39,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62612 states. [2021-06-05 16:58:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62612 to 38019. [2021-06-05 16:58:40,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38019 states, 38018 states have (on average 3.4814561523488874) internal successors, (132358), 38018 states have internal predecessors, (132358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:40,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38019 states to 38019 states and 132358 transitions. [2021-06-05 16:58:40,429 INFO L78 Accepts]: Start accepts. Automaton has 38019 states and 132358 transitions. Word has length 36 [2021-06-05 16:58:40,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:40,429 INFO L482 AbstractCegarLoop]: Abstraction has 38019 states and 132358 transitions. [2021-06-05 16:58:40,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:40,430 INFO L276 IsEmpty]: Start isEmpty. Operand 38019 states and 132358 transitions. [2021-06-05 16:58:40,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:58:40,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:40,479 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:40,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:40,681 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:40,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:40,681 INFO L82 PathProgramCache]: Analyzing trace with hash 613711262, now seen corresponding path program 152 times [2021-06-05 16:58:40,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:40,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934108515] [2021-06-05 16:58:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:40,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:40,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934108515] [2021-06-05 16:58:40,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934108515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:40,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900851875] [2021-06-05 16:58:40,729 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:40,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:40,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:40,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:58:40,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:58:40,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900851875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:40,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:40,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 16:58:40,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223702498] [2021-06-05 16:58:40,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:58:40,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:40,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:58:40,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:58:40,827 INFO L87 Difference]: Start difference. First operand 38019 states and 132358 transitions. Second operand has 16 states, 16 states have (on average 3.1875) 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 16:58:42,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:42,291 INFO L93 Difference]: Finished difference Result 63919 states and 217939 transitions. [2021-06-05 16:58:42,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 16:58:42,291 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) 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 36 [2021-06-05 16:58:42,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:42,426 INFO L225 Difference]: With dead ends: 63919 [2021-06-05 16:58:42,426 INFO L226 Difference]: Without dead ends: 63879 [2021-06-05 16:58:42,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 840.5ms TimeCoverageRelationStatistics Valid=1540, Invalid=6470, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 16:58:42,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63879 states. [2021-06-05 16:58:43,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63879 to 38411. [2021-06-05 16:58:43,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38411 states, 38410 states have (on average 3.478104660244728) internal successors, (133594), 38410 states have internal predecessors, (133594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:43,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38411 states to 38411 states and 133594 transitions. [2021-06-05 16:58:43,451 INFO L78 Accepts]: Start accepts. Automaton has 38411 states and 133594 transitions. Word has length 36 [2021-06-05 16:58:43,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:43,451 INFO L482 AbstractCegarLoop]: Abstraction has 38411 states and 133594 transitions. [2021-06-05 16:58:43,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) 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 16:58:43,451 INFO L276 IsEmpty]: Start isEmpty. Operand 38411 states and 133594 transitions. [2021-06-05 16:58:43,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:58:43,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:43,666 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:43,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-05 16:58:43,869 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:43,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:43,869 INFO L82 PathProgramCache]: Analyzing trace with hash -544224248, now seen corresponding path program 153 times [2021-06-05 16:58:43,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:43,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699314548] [2021-06-05 16:58:43,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:43,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:43,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699314548] [2021-06-05 16:58:43,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699314548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:43,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275138218] [2021-06-05 16:58:43,931 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:43,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:58:43,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:43,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:58:43,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:44,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275138218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:44,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:44,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-06-05 16:58:44,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856519844] [2021-06-05 16:58:44,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:58:44,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:44,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:58:44,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:58:44,045 INFO L87 Difference]: Start difference. First operand 38411 states and 133594 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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 16:58:45,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:45,709 INFO L93 Difference]: Finished difference Result 65073 states and 222032 transitions. [2021-06-05 16:58:45,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:58:45,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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 36 [2021-06-05 16:58:45,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:45,850 INFO L225 Difference]: With dead ends: 65073 [2021-06-05 16:58:45,850 INFO L226 Difference]: Without dead ends: 64989 [2021-06-05 16:58:45,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 1000.0ms TimeCoverageRelationStatistics Valid=1344, Invalid=6138, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 16:58:45,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64989 states. [2021-06-05 16:58:46,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64989 to 39127. [2021-06-05 16:58:46,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39127 states, 39126 states have (on average 3.468639779174973) internal successors, (135714), 39126 states have internal predecessors, (135714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:46,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39127 states to 39127 states and 135714 transitions. [2021-06-05 16:58:46,897 INFO L78 Accepts]: Start accepts. Automaton has 39127 states and 135714 transitions. Word has length 36 [2021-06-05 16:58:46,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:46,897 INFO L482 AbstractCegarLoop]: Abstraction has 39127 states and 135714 transitions. [2021-06-05 16:58:46,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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 16:58:46,897 INFO L276 IsEmpty]: Start isEmpty. Operand 39127 states and 135714 transitions. [2021-06-05 16:58:46,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:58:46,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:46,949 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:47,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:47,149 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:47,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:47,149 INFO L82 PathProgramCache]: Analyzing trace with hash -93570350, now seen corresponding path program 154 times [2021-06-05 16:58:47,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:47,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926381347] [2021-06-05 16:58:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:47,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:47,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926381347] [2021-06-05 16:58:47,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926381347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:47,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695432439] [2021-06-05 16:58:47,190 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:47,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:58:47,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:47,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:58:47,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:47,367 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 16:58:47,489 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:47,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695432439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:47,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:47,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 16:58:47,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293546573] [2021-06-05 16:58:47,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:58:47,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:47,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:58:47,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:58:47,490 INFO L87 Difference]: Start difference. First operand 39127 states and 135714 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:48,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:48,791 INFO L93 Difference]: Finished difference Result 102660 states and 349317 transitions. [2021-06-05 16:58:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:58:48,792 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:58:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:49,062 INFO L225 Difference]: With dead ends: 102660 [2021-06-05 16:58:49,063 INFO L226 Difference]: Without dead ends: 102660 [2021-06-05 16:58:49,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 460.7ms TimeCoverageRelationStatistics Valid=759, Invalid=1791, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:58:49,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102660 states. [2021-06-05 16:58:50,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102660 to 43208. [2021-06-05 16:58:50,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43208 states, 43207 states have (on average 3.5571550906103178) internal successors, (153694), 43207 states have internal predecessors, (153694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:50,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43208 states to 43208 states and 153694 transitions. [2021-06-05 16:58:50,805 INFO L78 Accepts]: Start accepts. Automaton has 43208 states and 153694 transitions. Word has length 36 [2021-06-05 16:58:50,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:50,805 INFO L482 AbstractCegarLoop]: Abstraction has 43208 states and 153694 transitions. [2021-06-05 16:58:50,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:50,805 INFO L276 IsEmpty]: Start isEmpty. Operand 43208 states and 153694 transitions. [2021-06-05 16:58:50,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:58:50,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:50,861 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:51,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:51,061 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:51,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:51,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1644681102, now seen corresponding path program 155 times [2021-06-05 16:58:51,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:51,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000118687] [2021-06-05 16:58:51,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:51,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:51,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000118687] [2021-06-05 16:58:51,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000118687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:51,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867221288] [2021-06-05 16:58:51,120 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:51,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 16:58:51,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:51,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:58:51,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:51,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867221288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:51,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:51,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 16:58:51,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836008524] [2021-06-05 16:58:51,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:58:51,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:51,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:58:51,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:58:51,279 INFO L87 Difference]: Start difference. First operand 43208 states and 153694 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:52,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:52,050 INFO L93 Difference]: Finished difference Result 55934 states and 195854 transitions. [2021-06-05 16:58:52,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:58:52,050 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:58:52,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:52,167 INFO L225 Difference]: With dead ends: 55934 [2021-06-05 16:58:52,167 INFO L226 Difference]: Without dead ends: 55934 [2021-06-05 16:58:52,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 311.7ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:58:52,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55934 states. [2021-06-05 16:58:53,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55934 to 44080. [2021-06-05 16:58:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44080 states, 44079 states have (on average 3.5467229292860547) internal successors, (156336), 44079 states have internal predecessors, (156336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:53,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44080 states to 44080 states and 156336 transitions. [2021-06-05 16:58:53,246 INFO L78 Accepts]: Start accepts. Automaton has 44080 states and 156336 transitions. Word has length 36 [2021-06-05 16:58:53,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:53,246 INFO L482 AbstractCegarLoop]: Abstraction has 44080 states and 156336 transitions. [2021-06-05 16:58:53,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:53,246 INFO L276 IsEmpty]: Start isEmpty. Operand 44080 states and 156336 transitions. [2021-06-05 16:58:53,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:58:53,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:53,303 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:53,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:53,503 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:53,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:53,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1465950898, now seen corresponding path program 156 times [2021-06-05 16:58:53,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:53,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796652458] [2021-06-05 16:58:53,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:53,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:53,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796652458] [2021-06-05 16:58:53,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796652458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:53,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865310616] [2021-06-05 16:58:53,555 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:53,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:58:53,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:53,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:58:53,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:53,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865310616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:53,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:53,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:58:53,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734690738] [2021-06-05 16:58:53,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:58:53,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:53,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:58:53,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:58:53,698 INFO L87 Difference]: Start difference. First operand 44080 states and 156336 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:54,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:54,358 INFO L93 Difference]: Finished difference Result 55590 states and 194951 transitions. [2021-06-05 16:58:54,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:58:54,358 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:58:54,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:54,494 INFO L225 Difference]: With dead ends: 55590 [2021-06-05 16:58:54,494 INFO L226 Difference]: Without dead ends: 55586 [2021-06-05 16:58:54,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:58:54,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55586 states. [2021-06-05 16:58:55,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55586 to 44002. [2021-06-05 16:58:55,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44002 states, 44001 states have (on average 3.5471693825140336) internal successors, (156079), 44001 states have internal predecessors, (156079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:55,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44002 states to 44002 states and 156079 transitions. [2021-06-05 16:58:55,699 INFO L78 Accepts]: Start accepts. Automaton has 44002 states and 156079 transitions. Word has length 36 [2021-06-05 16:58:55,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:55,699 INFO L482 AbstractCegarLoop]: Abstraction has 44002 states and 156079 transitions. [2021-06-05 16:58:55,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:55,699 INFO L276 IsEmpty]: Start isEmpty. Operand 44002 states and 156079 transitions. [2021-06-05 16:58:55,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:58:55,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:55,944 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:56,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:56,160 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:56,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:56,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1660404340, now seen corresponding path program 157 times [2021-06-05 16:58:56,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:56,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443984084] [2021-06-05 16:58:56,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:56,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:56,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443984084] [2021-06-05 16:58:56,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443984084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:56,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855196065] [2021-06-05 16:58:56,206 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:56,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:58:56,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:58:56,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855196065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:56,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:56,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 16:58:56,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764373958] [2021-06-05 16:58:56,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:58:56,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:56,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:58:56,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:58:56,360 INFO L87 Difference]: Start difference. First operand 44002 states and 156079 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:57,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:57,316 INFO L93 Difference]: Finished difference Result 55904 states and 195900 transitions. [2021-06-05 16:58:57,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:58:57,316 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:58:57,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:57,439 INFO L225 Difference]: With dead ends: 55904 [2021-06-05 16:58:57,440 INFO L226 Difference]: Without dead ends: 55888 [2021-06-05 16:58:57,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 548.7ms TimeCoverageRelationStatistics Valid=557, Invalid=2305, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:58:57,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55888 states. [2021-06-05 16:58:58,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55888 to 43876. [2021-06-05 16:58:58,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43876 states, 43875 states have (on average 3.5484900284900287) internal successors, (155690), 43875 states have internal predecessors, (155690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:58,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43876 states to 43876 states and 155690 transitions. [2021-06-05 16:58:58,613 INFO L78 Accepts]: Start accepts. Automaton has 43876 states and 155690 transitions. Word has length 36 [2021-06-05 16:58:58,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:58,614 INFO L482 AbstractCegarLoop]: Abstraction has 43876 states and 155690 transitions. [2021-06-05 16:58:58,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:58,614 INFO L276 IsEmpty]: Start isEmpty. Operand 43876 states and 155690 transitions. [2021-06-05 16:58:58,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:58:58,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:58,678 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:58,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-05 16:58:58,879 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:58,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:58,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1074676232, now seen corresponding path program 158 times [2021-06-05 16:58:58,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:58,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939017378] [2021-06-05 16:58:58,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:58,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:58,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939017378] [2021-06-05 16:58:58,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939017378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:58,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859625453] [2021-06-05 16:58:58,926 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:58,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:58,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:58,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:58:58,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:58:59,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859625453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:59,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:59,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 16:58:59,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118570119] [2021-06-05 16:58:59,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:58:59,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:59,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:58:59,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:58:59,111 INFO L87 Difference]: Start difference. First operand 43876 states and 155690 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:00,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:00,546 INFO L93 Difference]: Finished difference Result 62055 states and 216765 transitions. [2021-06-05 16:59:00,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:59:00,546 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:59:00,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:00,673 INFO L225 Difference]: With dead ends: 62055 [2021-06-05 16:59:00,673 INFO L226 Difference]: Without dead ends: 62043 [2021-06-05 16:59:00,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 753.6ms TimeCoverageRelationStatistics Valid=806, Invalid=3354, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:59:00,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62043 states. [2021-06-05 16:59:01,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62043 to 43875. [2021-06-05 16:59:01,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43875 states, 43874 states have (on average 3.55356247435839) internal successors, (155909), 43874 states have internal predecessors, (155909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:01,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43875 states to 43875 states and 155909 transitions. [2021-06-05 16:59:01,761 INFO L78 Accepts]: Start accepts. Automaton has 43875 states and 155909 transitions. Word has length 36 [2021-06-05 16:59:01,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:01,761 INFO L482 AbstractCegarLoop]: Abstraction has 43875 states and 155909 transitions. [2021-06-05 16:59:01,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:01,761 INFO L276 IsEmpty]: Start isEmpty. Operand 43875 states and 155909 transitions. [2021-06-05 16:59:01,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:59:01,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:01,819 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:02,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:02,019 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:02,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:02,019 INFO L82 PathProgramCache]: Analyzing trace with hash -208960008, now seen corresponding path program 159 times [2021-06-05 16:59:02,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:02,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201987668] [2021-06-05 16:59:02,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:02,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:02,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201987668] [2021-06-05 16:59:02,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201987668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:02,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9620529] [2021-06-05 16:59:02,067 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:02,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:59:02,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:02,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 16:59:02,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:02,187 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 8 treesize of output 7 [2021-06-05 16:59:02,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:02,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:02,196 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 16:59:02,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:27 [2021-06-05 16:59:02,232 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 16:59:02,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:59:02,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:02,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:02,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:59:02,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:39 [2021-06-05 16:59:02,328 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-06-05 16:59:02,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 32 [2021-06-05 16:59:02,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:02,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:02,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:59:02,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:45 [2021-06-05 16:59:02,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:02,427 INFO L354 Elim1Store]: treesize reduction 60, result has 15.5 percent of original size [2021-06-05 16:59:02,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 42 [2021-06-05 16:59:02,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:02,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:02,447 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 16:59:02,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:61, output treesize:60 [2021-06-05 16:59:02,706 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-05 16:59:02,765 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:59:02,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9620529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:02,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:02,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-06-05 16:59:02,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633470407] [2021-06-05 16:59:02,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:59:02,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:02,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:59:02,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:59:02,766 INFO L87 Difference]: Start difference. First operand 43875 states and 155909 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:06,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:06,087 INFO L93 Difference]: Finished difference Result 63737 states and 220306 transitions. [2021-06-05 16:59:06,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 16:59:06,087 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:59:06,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:06,237 INFO L225 Difference]: With dead ends: 63737 [2021-06-05 16:59:06,238 INFO L226 Difference]: Without dead ends: 63678 [2021-06-05 16:59:06,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5115 ImplicationChecksByTransitivity, 2170.3ms TimeCoverageRelationStatistics Valid=1602, Invalid=12204, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 16:59:06,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63678 states. [2021-06-05 16:59:07,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63678 to 44507. [2021-06-05 16:59:07,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44507 states, 44506 states have (on average 3.55304902709747) internal successors, (158132), 44506 states have internal predecessors, (158132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:07,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44507 states to 44507 states and 158132 transitions. [2021-06-05 16:59:07,390 INFO L78 Accepts]: Start accepts. Automaton has 44507 states and 158132 transitions. Word has length 36 [2021-06-05 16:59:07,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:07,390 INFO L482 AbstractCegarLoop]: Abstraction has 44507 states and 158132 transitions. [2021-06-05 16:59:07,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:07,390 INFO L276 IsEmpty]: Start isEmpty. Operand 44507 states and 158132 transitions. [2021-06-05 16:59:07,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:59:07,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:07,450 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:07,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 16:59:07,653 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:07,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:07,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1585932856, now seen corresponding path program 160 times [2021-06-05 16:59:07,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:07,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500915398] [2021-06-05 16:59:07,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:07,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:07,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500915398] [2021-06-05 16:59:07,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500915398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:07,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831288238] [2021-06-05 16:59:07,709 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:07,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:07,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:07,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:59:07,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:07,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831288238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:07,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:07,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 16:59:07,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9226393] [2021-06-05 16:59:07,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:59:07,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:07,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:59:07,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:59:07,868 INFO L87 Difference]: Start difference. First operand 44507 states and 158132 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:09,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:09,015 INFO L93 Difference]: Finished difference Result 80580 states and 276969 transitions. [2021-06-05 16:59:09,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:59:09,016 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:59:09,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:09,193 INFO L225 Difference]: With dead ends: 80580 [2021-06-05 16:59:09,194 INFO L226 Difference]: Without dead ends: 80580 [2021-06-05 16:59:09,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 482.5ms TimeCoverageRelationStatistics Valid=732, Invalid=2460, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:59:09,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80580 states. [2021-06-05 16:59:10,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80580 to 46437. [2021-06-05 16:59:10,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46437 states, 46436 states have (on average 3.579894909122233) internal successors, (166236), 46436 states have internal predecessors, (166236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:10,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46437 states to 46437 states and 166236 transitions. [2021-06-05 16:59:10,678 INFO L78 Accepts]: Start accepts. Automaton has 46437 states and 166236 transitions. Word has length 36 [2021-06-05 16:59:10,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:10,679 INFO L482 AbstractCegarLoop]: Abstraction has 46437 states and 166236 transitions. [2021-06-05 16:59:10,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand 46437 states and 166236 transitions. [2021-06-05 16:59:10,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:59:10,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:10,739 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:10,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:10,940 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:10,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:10,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1236979144, now seen corresponding path program 161 times [2021-06-05 16:59:10,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:10,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245079181] [2021-06-05 16:59:10,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:10,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:10,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245079181] [2021-06-05 16:59:10,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245079181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:10,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704521105] [2021-06-05 16:59:10,996 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:11,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:59:11,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:11,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:59:11,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:11,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704521105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:11,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:11,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 16:59:11,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334175653] [2021-06-05 16:59:11,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:59:11,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:11,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:59:11,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:59:11,156 INFO L87 Difference]: Start difference. First operand 46437 states and 166236 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:12,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:12,306 INFO L93 Difference]: Finished difference Result 86965 states and 298293 transitions. [2021-06-05 16:59:12,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:59:12,307 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:59:12,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:12,520 INFO L225 Difference]: With dead ends: 86965 [2021-06-05 16:59:12,520 INFO L226 Difference]: Without dead ends: 86965 [2021-06-05 16:59:12,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 378.8ms TimeCoverageRelationStatistics Valid=537, Invalid=1815, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:59:12,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86965 states. [2021-06-05 16:59:13,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86965 to 46927. [2021-06-05 16:59:13,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46927 states, 46926 states have (on average 3.586327409112219) internal successors, (168292), 46926 states have internal predecessors, (168292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:13,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46927 states to 46927 states and 168292 transitions. [2021-06-05 16:59:13,975 INFO L78 Accepts]: Start accepts. Automaton has 46927 states and 168292 transitions. Word has length 36 [2021-06-05 16:59:13,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:13,975 INFO L482 AbstractCegarLoop]: Abstraction has 46927 states and 168292 transitions. [2021-06-05 16:59:13,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:13,975 INFO L276 IsEmpty]: Start isEmpty. Operand 46927 states and 168292 transitions. [2021-06-05 16:59:14,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:59:14,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:14,036 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:14,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:14,236 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:14,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:14,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1387961778, now seen corresponding path program 162 times [2021-06-05 16:59:14,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:14,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82721221] [2021-06-05 16:59:14,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:14,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:14,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82721221] [2021-06-05 16:59:14,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82721221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:14,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511543958] [2021-06-05 16:59:14,294 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:14,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 16:59:14,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:14,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:59:14,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:14,676 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:14,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511543958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:14,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:14,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 16:59:14,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085859875] [2021-06-05 16:59:14,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:59:14,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:14,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:59:14,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:59:14,677 INFO L87 Difference]: Start difference. First operand 46927 states and 168292 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:15,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:15,655 INFO L93 Difference]: Finished difference Result 85794 states and 294291 transitions. [2021-06-05 16:59:15,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:59:15,656 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:59:15,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:15,844 INFO L225 Difference]: With dead ends: 85794 [2021-06-05 16:59:15,844 INFO L226 Difference]: Without dead ends: 85794 [2021-06-05 16:59:15,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 398.5ms TimeCoverageRelationStatistics Valid=513, Invalid=1839, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:59:15,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85794 states. [2021-06-05 16:59:17,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85794 to 48129. [2021-06-05 16:59:17,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48129 states, 48128 states have (on average 3.575236868351064) internal successors, (172069), 48128 states have internal predecessors, (172069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:17,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48129 states to 48129 states and 172069 transitions. [2021-06-05 16:59:17,490 INFO L78 Accepts]: Start accepts. Automaton has 48129 states and 172069 transitions. Word has length 36 [2021-06-05 16:59:17,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:17,490 INFO L482 AbstractCegarLoop]: Abstraction has 48129 states and 172069 transitions. [2021-06-05 16:59:17,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:17,490 INFO L276 IsEmpty]: Start isEmpty. Operand 48129 states and 172069 transitions. [2021-06-05 16:59:17,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:59:17,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:17,560 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:17,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-05 16:59:17,760 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:17,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:17,761 INFO L82 PathProgramCache]: Analyzing trace with hash -262360878, now seen corresponding path program 163 times [2021-06-05 16:59:17,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:17,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564679580] [2021-06-05 16:59:17,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:17,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:17,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564679580] [2021-06-05 16:59:17,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564679580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:17,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910532450] [2021-06-05 16:59:17,815 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:17,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:59:17,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:59:17,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910532450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:17,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:17,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-05 16:59:17,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276943551] [2021-06-05 16:59:17,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:59:17,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:17,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:59:17,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:59:17,977 INFO L87 Difference]: Start difference. First operand 48129 states and 172069 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:21,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:21,163 INFO L93 Difference]: Finished difference Result 88715 states and 301120 transitions. [2021-06-05 16:59:21,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-06-05 16:59:21,163 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:59:21,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:21,350 INFO L225 Difference]: With dead ends: 88715 [2021-06-05 16:59:21,350 INFO L226 Difference]: Without dead ends: 88715 [2021-06-05 16:59:21,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7758 ImplicationChecksByTransitivity, 1754.1ms TimeCoverageRelationStatistics Valid=3593, Invalid=15867, Unknown=0, NotChecked=0, Total=19460 [2021-06-05 16:59:21,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88715 states. [2021-06-05 16:59:22,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88715 to 45652. [2021-06-05 16:59:22,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45652 states, 45651 states have (on average 3.5827911765350158) internal successors, (163558), 45651 states have internal predecessors, (163558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:22,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45652 states to 45652 states and 163558 transitions. [2021-06-05 16:59:22,799 INFO L78 Accepts]: Start accepts. Automaton has 45652 states and 163558 transitions. Word has length 36 [2021-06-05 16:59:22,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:22,799 INFO L482 AbstractCegarLoop]: Abstraction has 45652 states and 163558 transitions. [2021-06-05 16:59:22,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:22,799 INFO L276 IsEmpty]: Start isEmpty. Operand 45652 states and 163558 transitions. [2021-06-05 16:59:22,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:59:22,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:22,857 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:23,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:23,057 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:23,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:23,058 INFO L82 PathProgramCache]: Analyzing trace with hash -541274128, now seen corresponding path program 164 times [2021-06-05 16:59:23,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:23,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175279634] [2021-06-05 16:59:23,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:23,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:23,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175279634] [2021-06-05 16:59:23,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175279634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:23,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810856988] [2021-06-05 16:59:23,108 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:23,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:23,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:23,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:59:23,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:59:23,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810856988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:23,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:23,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 16:59:23,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737334973] [2021-06-05 16:59:23,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:59:23,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:23,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:59:23,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:59:23,414 INFO L87 Difference]: Start difference. First operand 45652 states and 163558 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:24,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:24,288 INFO L93 Difference]: Finished difference Result 60067 states and 210919 transitions. [2021-06-05 16:59:24,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:59:24,288 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:59:24,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:24,421 INFO L225 Difference]: With dead ends: 60067 [2021-06-05 16:59:24,421 INFO L226 Difference]: Without dead ends: 60043 [2021-06-05 16:59:24,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 679.9ms TimeCoverageRelationStatistics Valid=593, Invalid=2269, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:59:24,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60043 states. [2021-06-05 16:59:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60043 to 45808. [2021-06-05 16:59:25,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45808 states, 45807 states have (on average 3.58054445827057) internal successors, (164014), 45807 states have internal predecessors, (164014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:25,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45808 states to 45808 states and 164014 transitions. [2021-06-05 16:59:25,643 INFO L78 Accepts]: Start accepts. Automaton has 45808 states and 164014 transitions. Word has length 36 [2021-06-05 16:59:25,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:25,643 INFO L482 AbstractCegarLoop]: Abstraction has 45808 states and 164014 transitions. [2021-06-05 16:59:25,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:25,643 INFO L276 IsEmpty]: Start isEmpty. Operand 45808 states and 164014 transitions. [2021-06-05 16:59:25,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:59:25,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:25,851 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:26,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:26,051 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:26,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:26,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1183120336, now seen corresponding path program 165 times [2021-06-05 16:59:26,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:26,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502312666] [2021-06-05 16:59:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:26,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:26,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502312666] [2021-06-05 16:59:26,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502312666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:26,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039240144] [2021-06-05 16:59:26,109 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:26,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:59:26,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:26,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:59:26,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:26,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039240144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:26,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:26,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 16:59:26,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871884900] [2021-06-05 16:59:26,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:59:26,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:26,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:59:26,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:59:26,237 INFO L87 Difference]: Start difference. First operand 45808 states and 164014 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:27,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:27,027 INFO L93 Difference]: Finished difference Result 60487 states and 212293 transitions. [2021-06-05 16:59:27,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:59:27,028 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:59:27,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:27,154 INFO L225 Difference]: With dead ends: 60487 [2021-06-05 16:59:27,155 INFO L226 Difference]: Without dead ends: 60447 [2021-06-05 16:59:27,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 379.4ms TimeCoverageRelationStatistics Valid=483, Invalid=1773, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:59:27,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60447 states. [2021-06-05 16:59:28,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60447 to 45848. [2021-06-05 16:59:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45848 states, 45847 states have (on average 3.579776212184003) internal successors, (164122), 45847 states have internal predecessors, (164122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:28,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45848 states to 45848 states and 164122 transitions. [2021-06-05 16:59:28,520 INFO L78 Accepts]: Start accepts. Automaton has 45848 states and 164122 transitions. Word has length 36 [2021-06-05 16:59:28,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:28,520 INFO L482 AbstractCegarLoop]: Abstraction has 45848 states and 164122 transitions. [2021-06-05 16:59:28,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:28,520 INFO L276 IsEmpty]: Start isEmpty. Operand 45848 states and 164122 transitions. [2021-06-05 16:59:28,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:59:28,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:28,587 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:28,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:28,787 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:28,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:28,787 INFO L82 PathProgramCache]: Analyzing trace with hash 477964400, now seen corresponding path program 166 times [2021-06-05 16:59:28,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:28,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238148768] [2021-06-05 16:59:28,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:28,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:28,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238148768] [2021-06-05 16:59:28,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238148768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:28,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746659455] [2021-06-05 16:59:28,844 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:28,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:28,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:28,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:59:28,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:59:28,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746659455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:28,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:28,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 16:59:28,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501746517] [2021-06-05 16:59:28,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:59:28,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:28,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:59:28,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:59:28,959 INFO L87 Difference]: Start difference. First operand 45848 states and 164122 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:29,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:29,507 INFO L93 Difference]: Finished difference Result 61038 states and 214089 transitions. [2021-06-05 16:59:29,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:59:29,507 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:59:29,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:29,643 INFO L225 Difference]: With dead ends: 61038 [2021-06-05 16:59:29,643 INFO L226 Difference]: Without dead ends: 60982 [2021-06-05 16:59:29,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 251.5ms TimeCoverageRelationStatistics Valid=324, Invalid=1158, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:59:29,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60982 states. [2021-06-05 16:59:30,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60982 to 46210. [2021-06-05 16:59:30,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46210 states, 46209 states have (on average 3.574996212858967) internal successors, (165197), 46209 states have internal predecessors, (165197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:30,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46210 states to 46210 states and 165197 transitions. [2021-06-05 16:59:30,879 INFO L78 Accepts]: Start accepts. Automaton has 46210 states and 165197 transitions. Word has length 36 [2021-06-05 16:59:30,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:30,879 INFO L482 AbstractCegarLoop]: Abstraction has 46210 states and 165197 transitions. [2021-06-05 16:59:30,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:30,879 INFO L276 IsEmpty]: Start isEmpty. Operand 46210 states and 165197 transitions. [2021-06-05 16:59:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:59:31,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:31,096 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:31,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable197 [2021-06-05 16:59:31,301 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:31,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:31,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1387504756, now seen corresponding path program 167 times [2021-06-05 16:59:31,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:31,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958163109] [2021-06-05 16:59:31,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:31,364 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:31,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:31,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958163109] [2021-06-05 16:59:31,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958163109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:31,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485284763] [2021-06-05 16:59:31,364 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:31,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:59:31,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:31,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:59:31,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:31,508 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:31,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485284763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:31,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:31,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 16:59:31,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053954483] [2021-06-05 16:59:31,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:59:31,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:31,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:59:31,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:59:31,509 INFO L87 Difference]: Start difference. First operand 46210 states and 165197 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:33,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:33,685 INFO L93 Difference]: Finished difference Result 98103 states and 338371 transitions. [2021-06-05 16:59:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 16:59:33,685 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:59:33,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:33,895 INFO L225 Difference]: With dead ends: 98103 [2021-06-05 16:59:33,895 INFO L226 Difference]: Without dead ends: 98007 [2021-06-05 16:59:33,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4211 ImplicationChecksByTransitivity, 1222.1ms TimeCoverageRelationStatistics Valid=2335, Invalid=8795, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 16:59:34,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98007 states. [2021-06-05 16:59:35,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98007 to 48240. [2021-06-05 16:59:35,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48240 states, 48239 states have (on average 3.5919069632455067) internal successors, (173270), 48239 states have internal predecessors, (173270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:35,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48240 states to 48240 states and 173270 transitions. [2021-06-05 16:59:35,448 INFO L78 Accepts]: Start accepts. Automaton has 48240 states and 173270 transitions. Word has length 36 [2021-06-05 16:59:35,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:35,448 INFO L482 AbstractCegarLoop]: Abstraction has 48240 states and 173270 transitions. [2021-06-05 16:59:35,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:35,449 INFO L276 IsEmpty]: Start isEmpty. Operand 48240 states and 173270 transitions. [2021-06-05 16:59:35,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:59:35,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:35,786 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:36,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:36,001 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:36,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:36,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1051947072, now seen corresponding path program 31 times [2021-06-05 16:59:36,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:36,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104537363] [2021-06-05 16:59:36,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:36,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:36,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104537363] [2021-06-05 16:59:36,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104537363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:36,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106683517] [2021-06-05 16:59:36,061 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:36,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:59:36,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:36,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106683517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:36,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:36,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 16:59:36,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269683935] [2021-06-05 16:59:36,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:59:36,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:36,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:59:36,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:59:36,243 INFO L87 Difference]: Start difference. First operand 48240 states and 173270 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:38,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:38,287 INFO L93 Difference]: Finished difference Result 93202 states and 319824 transitions. [2021-06-05 16:59:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 16:59:38,287 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:59:38,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:38,490 INFO L225 Difference]: With dead ends: 93202 [2021-06-05 16:59:38,490 INFO L226 Difference]: Without dead ends: 93202 [2021-06-05 16:59:38,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3041 ImplicationChecksByTransitivity, 1001.9ms TimeCoverageRelationStatistics Valid=1871, Invalid=6139, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 16:59:38,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93202 states. [2021-06-05 16:59:39,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93202 to 47715. [2021-06-05 16:59:39,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47715 states, 47714 states have (on average 3.5815274342960137) internal successors, (170889), 47714 states have internal predecessors, (170889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47715 states to 47715 states and 170889 transitions. [2021-06-05 16:59:40,014 INFO L78 Accepts]: Start accepts. Automaton has 47715 states and 170889 transitions. Word has length 36 [2021-06-05 16:59:40,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:40,015 INFO L482 AbstractCegarLoop]: Abstraction has 47715 states and 170889 transitions. [2021-06-05 16:59:40,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:40,015 INFO L276 IsEmpty]: Start isEmpty. Operand 47715 states and 170889 transitions. [2021-06-05 16:59:40,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:59:40,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:40,077 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:40,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:40,278 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:40,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:40,278 INFO L82 PathProgramCache]: Analyzing trace with hash 822150136, now seen corresponding path program 32 times [2021-06-05 16:59:40,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:40,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846656997] [2021-06-05 16:59:40,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:40,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:40,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846656997] [2021-06-05 16:59:40,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846656997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:40,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087851909] [2021-06-05 16:59:40,326 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:40,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:40,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:40,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:59:40,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:40,665 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-05 16:59:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:59:40,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087851909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:40,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:40,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 16:59:40,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629743494] [2021-06-05 16:59:40,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:59:40,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:40,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:59:40,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:59:40,688 INFO L87 Difference]: Start difference. First operand 47715 states and 170889 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:44,235 INFO L93 Difference]: Finished difference Result 90552 states and 306749 transitions. [2021-06-05 16:59:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2021-06-05 16:59:44,236 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:59:44,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:44,429 INFO L225 Difference]: With dead ends: 90552 [2021-06-05 16:59:44,429 INFO L226 Difference]: Without dead ends: 90552 [2021-06-05 16:59:44,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11781 ImplicationChecksByTransitivity, 2420.0ms TimeCoverageRelationStatistics Valid=4945, Invalid=22445, Unknown=0, NotChecked=0, Total=27390 [2021-06-05 16:59:44,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90552 states. [2021-06-05 16:59:45,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90552 to 47578. [2021-06-05 16:59:45,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47578 states, 47577 states have (on average 3.5791664039346744) internal successors, (170286), 47577 states have internal predecessors, (170286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47578 states to 47578 states and 170286 transitions. [2021-06-05 16:59:46,093 INFO L78 Accepts]: Start accepts. Automaton has 47578 states and 170286 transitions. Word has length 36 [2021-06-05 16:59:46,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:46,093 INFO L482 AbstractCegarLoop]: Abstraction has 47578 states and 170286 transitions. [2021-06-05 16:59:46,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:46,093 INFO L276 IsEmpty]: Start isEmpty. Operand 47578 states and 170286 transitions. [2021-06-05 16:59:46,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 16:59:46,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:46,157 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:46,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 16:59:46,358 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:46,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:46,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1213094942, now seen corresponding path program 168 times [2021-06-05 16:59:46,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:46,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197892027] [2021-06-05 16:59:46,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:46,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:46,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197892027] [2021-06-05 16:59:46,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197892027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:46,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57638258] [2021-06-05 16:59:46,428 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:46,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:59:46,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:46,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:59:46,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:46,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57638258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:46,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:46,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 16:59:46,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586865511] [2021-06-05 16:59:46,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:59:46,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:46,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:59:46,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:59:46,623 INFO L87 Difference]: Start difference. First operand 47578 states and 170286 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:48,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:48,860 INFO L93 Difference]: Finished difference Result 84172 states and 291355 transitions. [2021-06-05 16:59:48,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 16:59:48,861 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 16:59:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:49,051 INFO L225 Difference]: With dead ends: 84172 [2021-06-05 16:59:49,051 INFO L226 Difference]: Without dead ends: 84172 [2021-06-05 16:59:49,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3966 ImplicationChecksByTransitivity, 1306.0ms TimeCoverageRelationStatistics Valid=2254, Invalid=8666, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 16:59:49,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84172 states. [2021-06-05 16:59:50,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84172 to 46240. [2021-06-05 16:59:50,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46240 states, 46239 states have (on average 3.55470490278769) internal successors, (164366), 46239 states have internal predecessors, (164366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:50,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46240 states to 46240 states and 164366 transitions. [2021-06-05 16:59:50,525 INFO L78 Accepts]: Start accepts. Automaton has 46240 states and 164366 transitions. Word has length 38 [2021-06-05 16:59:50,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:50,525 INFO L482 AbstractCegarLoop]: Abstraction has 46240 states and 164366 transitions. [2021-06-05 16:59:50,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:50,525 INFO L276 IsEmpty]: Start isEmpty. Operand 46240 states and 164366 transitions. [2021-06-05 16:59:50,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 16:59:50,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:50,812 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:51,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 16:59:51,027 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:51,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:51,028 INFO L82 PathProgramCache]: Analyzing trace with hash -660509142, now seen corresponding path program 169 times [2021-06-05 16:59:51,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:51,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073460199] [2021-06-05 16:59:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:51,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:51,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073460199] [2021-06-05 16:59:51,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073460199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:51,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046770946] [2021-06-05 16:59:51,102 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:51,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:59:51,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:51,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046770946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:51,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:51,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 16:59:51,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019185381] [2021-06-05 16:59:51,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:59:51,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:51,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:59:51,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:59:51,303 INFO L87 Difference]: Start difference. First operand 46240 states and 164366 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:54,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:54,085 INFO L93 Difference]: Finished difference Result 102346 states and 353710 transitions. [2021-06-05 16:59:54,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 16:59:54,085 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 16:59:54,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:54,379 INFO L225 Difference]: With dead ends: 102346 [2021-06-05 16:59:54,379 INFO L226 Difference]: Without dead ends: 102346 [2021-06-05 16:59:54,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4822 ImplicationChecksByTransitivity, 1333.3ms TimeCoverageRelationStatistics Valid=2499, Invalid=10611, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 16:59:54,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102346 states. [2021-06-05 16:59:55,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102346 to 46231. [2021-06-05 16:59:55,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46231 states, 46230 states have (on average 3.55425048669695) internal successors, (164313), 46230 states have internal predecessors, (164313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:55,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46231 states to 46231 states and 164313 transitions. [2021-06-05 16:59:55,999 INFO L78 Accepts]: Start accepts. Automaton has 46231 states and 164313 transitions. Word has length 38 [2021-06-05 16:59:55,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:55,999 INFO L482 AbstractCegarLoop]: Abstraction has 46231 states and 164313 transitions. [2021-06-05 16:59:55,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:55,999 INFO L276 IsEmpty]: Start isEmpty. Operand 46231 states and 164313 transitions. [2021-06-05 16:59:56,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 16:59:56,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:56,062 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:56,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 16:59:56,263 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:56,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:56,264 INFO L82 PathProgramCache]: Analyzing trace with hash -645048346, now seen corresponding path program 170 times [2021-06-05 16:59:56,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:56,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200598463] [2021-06-05 16:59:56,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:56,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:56,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200598463] [2021-06-05 16:59:56,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200598463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:56,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68068381] [2021-06-05 16:59:56,335 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:56,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:56,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:56,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 16:59:56,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:56,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68068381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:56,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:56,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 16:59:56,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278607202] [2021-06-05 16:59:56,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:59:56,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:56,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:59:56,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:59:56,562 INFO L87 Difference]: Start difference. First operand 46231 states and 164313 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:59,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:59,544 INFO L93 Difference]: Finished difference Result 103205 states and 355608 transitions. [2021-06-05 16:59:59,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 16:59:59,544 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 16:59:59,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:59,793 INFO L225 Difference]: With dead ends: 103205 [2021-06-05 16:59:59,793 INFO L226 Difference]: Without dead ends: 103205 [2021-06-05 16:59:59,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4862 ImplicationChecksByTransitivity, 1596.9ms TimeCoverageRelationStatistics Valid=2510, Invalid=10830, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 16:59:59,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103205 states. [2021-06-05 17:00:01,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103205 to 46140. [2021-06-05 17:00:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46140 states, 46139 states have (on average 3.551940874314571) internal successors, (163883), 46139 states have internal predecessors, (163883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:01,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46140 states to 46140 states and 163883 transitions. [2021-06-05 17:00:01,399 INFO L78 Accepts]: Start accepts. Automaton has 46140 states and 163883 transitions. Word has length 38 [2021-06-05 17:00:01,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:01,399 INFO L482 AbstractCegarLoop]: Abstraction has 46140 states and 163883 transitions. [2021-06-05 17:00:01,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:01,399 INFO L276 IsEmpty]: Start isEmpty. Operand 46140 states and 163883 transitions. [2021-06-05 17:00:01,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:00:01,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:01,462 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 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 17:00:01,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:01,662 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:01,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:01,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1650063650, now seen corresponding path program 171 times [2021-06-05 17:00:01,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:01,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711016712] [2021-06-05 17:00:01,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:01,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:01,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711016712] [2021-06-05 17:00:01,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711016712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:01,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67903698] [2021-06-05 17:00:01,749 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:01,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:00:01,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:01,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 17:00:01,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:01,860 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 8 treesize of output 7 [2021-06-05 17:00:01,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:02,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:02,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:02,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:20 [2021-06-05 17:00:02,140 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 17:00:02,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 17:00:02,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:02,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:02,152 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 17:00:02,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:32 [2021-06-05 17:00:02,242 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-05 17:00:02,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 17:00:02,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:02,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:02,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 17:00:02,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:41 [2021-06-05 17:00:02,334 INFO L354 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2021-06-05 17:00:02,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 17:00:02,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:02,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:02,355 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 17:00:02,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:54, output treesize:53 [2021-06-05 17:00:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-05 17:00:02,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67903698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:02,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:02,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 17:00:02,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912040514] [2021-06-05 17:00:02,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:00:02,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:02,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:00:02,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:00:02,469 INFO L87 Difference]: Start difference. First operand 46140 states and 163883 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:12,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:12,691 INFO L93 Difference]: Finished difference Result 75308 states and 254815 transitions. [2021-06-05 17:00:12,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2021-06-05 17:00:12,692 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:00:12,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:12,859 INFO L225 Difference]: With dead ends: 75308 [2021-06-05 17:00:12,860 INFO L226 Difference]: Without dead ends: 75043 [2021-06-05 17:00:12,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30066 ImplicationChecksByTransitivity, 7707.1ms TimeCoverageRelationStatistics Valid=9127, Invalid=59779, Unknown=0, NotChecked=0, Total=68906 [2021-06-05 17:00:13,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75043 states. [2021-06-05 17:00:14,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75043 to 48238. [2021-06-05 17:00:14,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48238 states, 48237 states have (on average 3.5619545162427184) internal successors, (171818), 48237 states have internal predecessors, (171818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:14,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48238 states to 48238 states and 171818 transitions. [2021-06-05 17:00:14,214 INFO L78 Accepts]: Start accepts. Automaton has 48238 states and 171818 transitions. Word has length 38 [2021-06-05 17:00:14,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:14,214 INFO L482 AbstractCegarLoop]: Abstraction has 48238 states and 171818 transitions. [2021-06-05 17:00:14,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:14,214 INFO L276 IsEmpty]: Start isEmpty. Operand 48238 states and 171818 transitions. [2021-06-05 17:00:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:00:14,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:14,281 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:00:14,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 17:00:14,482 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:14,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:14,482 INFO L82 PathProgramCache]: Analyzing trace with hash 509936226, now seen corresponding path program 172 times [2021-06-05 17:00:14,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:14,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424120004] [2021-06-05 17:00:14,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:14,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:14,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:14,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424120004] [2021-06-05 17:00:14,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424120004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:14,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912972534] [2021-06-05 17:00:14,558 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:14,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:14,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:14,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:00:14,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:14,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912972534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:14,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:14,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 17:00:14,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850310568] [2021-06-05 17:00:14,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:00:14,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:14,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:00:14,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:00:14,754 INFO L87 Difference]: Start difference. First operand 48238 states and 171818 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:17,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:17,219 INFO L93 Difference]: Finished difference Result 81604 states and 282162 transitions. [2021-06-05 17:00:17,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 17:00:17,221 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:00:17,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:17,424 INFO L225 Difference]: With dead ends: 81604 [2021-06-05 17:00:17,424 INFO L226 Difference]: Without dead ends: 81604 [2021-06-05 17:00:17,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3744 ImplicationChecksByTransitivity, 1395.0ms TimeCoverageRelationStatistics Valid=2006, Invalid=8500, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 17:00:17,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81604 states. [2021-06-05 17:00:18,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81604 to 48089. [2021-06-05 17:00:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48089 states, 48088 states have (on average 3.559682249209782) internal successors, (171178), 48088 states have internal predecessors, (171178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:18,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48089 states to 48089 states and 171178 transitions. [2021-06-05 17:00:18,996 INFO L78 Accepts]: Start accepts. Automaton has 48089 states and 171178 transitions. Word has length 38 [2021-06-05 17:00:18,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:18,997 INFO L482 AbstractCegarLoop]: Abstraction has 48089 states and 171178 transitions. [2021-06-05 17:00:18,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:18,997 INFO L276 IsEmpty]: Start isEmpty. Operand 48089 states and 171178 transitions. [2021-06-05 17:00:19,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:00:19,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:19,292 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:00:19,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:19,493 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:19,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:19,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1496118174, now seen corresponding path program 173 times [2021-06-05 17:00:19,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:19,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993055732] [2021-06-05 17:00:19,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:19,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:19,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993055732] [2021-06-05 17:00:19,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993055732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:19,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981299838] [2021-06-05 17:00:19,565 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:19,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 17:00:19,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:19,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:00:19,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:19,737 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:19,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981299838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:19,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:19,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 17:00:19,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026927830] [2021-06-05 17:00:19,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:00:19,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:19,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:00:19,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:00:19,738 INFO L87 Difference]: Start difference. First operand 48089 states and 171178 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:21,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:21,470 INFO L93 Difference]: Finished difference Result 79734 states and 276240 transitions. [2021-06-05 17:00:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 17:00:21,471 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:00:21,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:21,841 INFO L225 Difference]: With dead ends: 79734 [2021-06-05 17:00:21,842 INFO L226 Difference]: Without dead ends: 79734 [2021-06-05 17:00:21,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2751 ImplicationChecksByTransitivity, 910.0ms TimeCoverageRelationStatistics Valid=1525, Invalid=6485, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 17:00:21,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79734 states. [2021-06-05 17:00:23,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79734 to 48379. [2021-06-05 17:00:23,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48379 states, 48378 states have (on average 3.5571747488527845) internal successors, (172089), 48378 states have internal predecessors, (172089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:23,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48379 states to 48379 states and 172089 transitions. [2021-06-05 17:00:23,193 INFO L78 Accepts]: Start accepts. Automaton has 48379 states and 172089 transitions. Word has length 38 [2021-06-05 17:00:23,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:23,193 INFO L482 AbstractCegarLoop]: Abstraction has 48379 states and 172089 transitions. [2021-06-05 17:00:23,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:23,193 INFO L276 IsEmpty]: Start isEmpty. Operand 48379 states and 172089 transitions. [2021-06-05 17:00:23,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:00:23,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:23,261 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:23,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 17:00:23,461 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:23,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:23,461 INFO L82 PathProgramCache]: Analyzing trace with hash 383786966, now seen corresponding path program 33 times [2021-06-05 17:00:23,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:23,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735513561] [2021-06-05 17:00:23,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:23,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:23,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:23,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735513561] [2021-06-05 17:00:23,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735513561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:23,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457066132] [2021-06-05 17:00:23,529 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:23,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:00:23,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:23,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 17:00:23,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:23,695 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 17:00:23,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:23,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:23,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:23,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-06-05 17:00:23,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:23,728 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 20 treesize of output 22 [2021-06-05 17:00:23,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:23,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:23,739 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 17:00:23,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:36 [2021-06-05 17:00:23,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:23,791 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-06-05 17:00:23,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-06-05 17:00:23,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:23,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:23,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 17:00:23,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:48 [2021-06-05 17:00:23,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:23,889 INFO L354 Elim1Store]: treesize reduction 72, result has 20.0 percent of original size [2021-06-05 17:00:23,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 42 [2021-06-05 17:00:23,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:23,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:23,916 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 17:00:23,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:61, output treesize:60 [2021-06-05 17:00:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 17:00:24,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457066132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:24,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:24,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-06-05 17:00:24,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296530081] [2021-06-05 17:00:24,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 17:00:24,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:24,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 17:00:24,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:00:24,035 INFO L87 Difference]: Start difference. First operand 48379 states and 172089 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:30,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:30,607 INFO L93 Difference]: Finished difference Result 58151 states and 199699 transitions. [2021-06-05 17:00:30,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-06-05 17:00:30,608 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:00:30,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:30,740 INFO L225 Difference]: With dead ends: 58151 [2021-06-05 17:00:30,740 INFO L226 Difference]: Without dead ends: 57965 [2021-06-05 17:00:30,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9563 ImplicationChecksByTransitivity, 4187.5ms TimeCoverageRelationStatistics Valid=3322, Invalid=23084, Unknown=0, NotChecked=0, Total=26406 [2021-06-05 17:00:30,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57965 states. [2021-06-05 17:00:31,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57965 to 49217. [2021-06-05 17:00:31,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49217 states, 49216 states have (on average 3.544457087126138) internal successors, (174444), 49216 states have internal predecessors, (174444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:31,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49217 states to 49217 states and 174444 transitions. [2021-06-05 17:00:31,913 INFO L78 Accepts]: Start accepts. Automaton has 49217 states and 174444 transitions. Word has length 38 [2021-06-05 17:00:31,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:31,914 INFO L482 AbstractCegarLoop]: Abstraction has 49217 states and 174444 transitions. [2021-06-05 17:00:31,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:31,914 INFO L276 IsEmpty]: Start isEmpty. Operand 49217 states and 174444 transitions. [2021-06-05 17:00:31,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:00:31,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:31,982 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:32,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-06-05 17:00:32,182 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:32,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:32,183 INFO L82 PathProgramCache]: Analyzing trace with hash -977093798, now seen corresponding path program 34 times [2021-06-05 17:00:32,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:32,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496204902] [2021-06-05 17:00:32,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:32,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:32,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496204902] [2021-06-05 17:00:32,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496204902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:32,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422381681] [2021-06-05 17:00:32,252 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:32,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:32,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:32,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:00:32,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:32,638 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:32,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422381681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:32,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:32,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 17:00:32,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878571683] [2021-06-05 17:00:32,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:00:32,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:32,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:00:32,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:00:32,639 INFO L87 Difference]: Start difference. First operand 49217 states and 174444 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:34,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:34,791 INFO L93 Difference]: Finished difference Result 86687 states and 295949 transitions. [2021-06-05 17:00:34,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 17:00:34,791 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:00:34,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:35,199 INFO L225 Difference]: With dead ends: 86687 [2021-06-05 17:00:35,199 INFO L226 Difference]: Without dead ends: 86687 [2021-06-05 17:00:35,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4336 ImplicationChecksByTransitivity, 1433.8ms TimeCoverageRelationStatistics Valid=2398, Invalid=9158, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 17:00:35,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86687 states. [2021-06-05 17:00:36,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86687 to 49319. [2021-06-05 17:00:36,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49319 states, 49318 states have (on average 3.541627803236141) internal successors, (174666), 49318 states have internal predecessors, (174666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:36,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49319 states to 49319 states and 174666 transitions. [2021-06-05 17:00:36,678 INFO L78 Accepts]: Start accepts. Automaton has 49319 states and 174666 transitions. Word has length 38 [2021-06-05 17:00:36,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:36,678 INFO L482 AbstractCegarLoop]: Abstraction has 49319 states and 174666 transitions. [2021-06-05 17:00:36,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:36,678 INFO L276 IsEmpty]: Start isEmpty. Operand 49319 states and 174666 transitions. [2021-06-05 17:00:36,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:00:36,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:36,749 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:00:36,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:36,961 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:36,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:36,961 INFO L82 PathProgramCache]: Analyzing trace with hash -151929582, now seen corresponding path program 174 times [2021-06-05 17:00:36,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:36,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447306700] [2021-06-05 17:00:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:37,011 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:37,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:37,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447306700] [2021-06-05 17:00:37,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447306700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:37,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307106606] [2021-06-05 17:00:37,011 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:37,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 17:00:37,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:37,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:00:37,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:37,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307106606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:37,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:37,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:00:37,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569685301] [2021-06-05 17:00:37,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:00:37,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:37,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:00:37,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:00:37,165 INFO L87 Difference]: Start difference. First operand 49319 states and 174666 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:38,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:38,888 INFO L93 Difference]: Finished difference Result 80441 states and 277407 transitions. [2021-06-05 17:00:38,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 17:00:38,889 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:00:38,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:39,070 INFO L225 Difference]: With dead ends: 80441 [2021-06-05 17:00:39,071 INFO L226 Difference]: Without dead ends: 80433 [2021-06-05 17:00:39,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2578 ImplicationChecksByTransitivity, 717.1ms TimeCoverageRelationStatistics Valid=1363, Invalid=5609, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 17:00:39,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80433 states. [2021-06-05 17:00:40,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80433 to 49027. [2021-06-05 17:00:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49027 states, 49026 states have (on average 3.5350222331008037) internal successors, (173308), 49026 states have internal predecessors, (173308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:40,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49027 states to 49027 states and 173308 transitions. [2021-06-05 17:00:40,621 INFO L78 Accepts]: Start accepts. Automaton has 49027 states and 173308 transitions. Word has length 38 [2021-06-05 17:00:40,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:40,622 INFO L482 AbstractCegarLoop]: Abstraction has 49027 states and 173308 transitions. [2021-06-05 17:00:40,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:40,622 INFO L276 IsEmpty]: Start isEmpty. Operand 49027 states and 173308 transitions. [2021-06-05 17:00:40,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:00:40,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:40,691 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:00:40,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-05 17:00:40,892 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:40,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:40,892 INFO L82 PathProgramCache]: Analyzing trace with hash 826627862, now seen corresponding path program 175 times [2021-06-05 17:00:40,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:40,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504388310] [2021-06-05 17:00:40,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:41,140 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:41,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:41,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504388310] [2021-06-05 17:00:41,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504388310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:41,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041452284] [2021-06-05 17:00:41,140 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:41,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:00:41,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:41,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041452284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:41,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:41,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:00:41,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823594154] [2021-06-05 17:00:41,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:00:41,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:41,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:00:41,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:00:41,286 INFO L87 Difference]: Start difference. First operand 49027 states and 173308 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:42,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:42,837 INFO L93 Difference]: Finished difference Result 81538 states and 279709 transitions. [2021-06-05 17:00:42,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 17:00:42,837 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:00:42,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:43,039 INFO L225 Difference]: With dead ends: 81538 [2021-06-05 17:00:43,039 INFO L226 Difference]: Without dead ends: 81538 [2021-06-05 17:00:43,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2860 ImplicationChecksByTransitivity, 724.6ms TimeCoverageRelationStatistics Valid=1397, Invalid=6085, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 17:00:43,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81538 states. [2021-06-05 17:00:44,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81538 to 48751. [2021-06-05 17:00:44,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48751 states, 48750 states have (on average 3.5292717948717947) internal successors, (172052), 48750 states have internal predecessors, (172052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:44,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48751 states to 48751 states and 172052 transitions. [2021-06-05 17:00:44,682 INFO L78 Accepts]: Start accepts. Automaton has 48751 states and 172052 transitions. Word has length 38 [2021-06-05 17:00:44,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:44,683 INFO L482 AbstractCegarLoop]: Abstraction has 48751 states and 172052 transitions. [2021-06-05 17:00:44,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:44,683 INFO L276 IsEmpty]: Start isEmpty. Operand 48751 states and 172052 transitions. [2021-06-05 17:00:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:00:44,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:44,763 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:00:44,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 17:00:44,964 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:44,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:44,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1341193110, now seen corresponding path program 176 times [2021-06-05 17:00:44,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:44,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209399927] [2021-06-05 17:00:44,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:45,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:45,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209399927] [2021-06-05 17:00:45,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209399927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:45,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585554533] [2021-06-05 17:00:45,010 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:45,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:45,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:45,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:00:45,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:45,220 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:45,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585554533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:45,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:45,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:00:45,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762116294] [2021-06-05 17:00:45,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:00:45,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:45,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:00:45,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:00:45,221 INFO L87 Difference]: Start difference. First operand 48751 states and 172052 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:46,962 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 17:00:47,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:47,394 INFO L93 Difference]: Finished difference Result 91319 states and 312144 transitions. [2021-06-05 17:00:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 17:00:47,394 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:00:47,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:47,611 INFO L225 Difference]: With dead ends: 91319 [2021-06-05 17:00:47,611 INFO L226 Difference]: Without dead ends: 91319 [2021-06-05 17:00:47,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3311 ImplicationChecksByTransitivity, 1161.5ms TimeCoverageRelationStatistics Valid=1776, Invalid=6966, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 17:00:47,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91319 states. [2021-06-05 17:00:49,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91319 to 49212. [2021-06-05 17:00:49,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49212 states, 49211 states have (on average 3.5392087134990144) internal successors, (174168), 49211 states have internal predecessors, (174168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49212 states to 49212 states and 174168 transitions. [2021-06-05 17:00:49,392 INFO L78 Accepts]: Start accepts. Automaton has 49212 states and 174168 transitions. Word has length 38 [2021-06-05 17:00:49,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:49,392 INFO L482 AbstractCegarLoop]: Abstraction has 49212 states and 174168 transitions. [2021-06-05 17:00:49,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:49,392 INFO L276 IsEmpty]: Start isEmpty. Operand 49212 states and 174168 transitions. [2021-06-05 17:00:49,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:00:49,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:49,669 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:00:49,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:49,870 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:49,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:49,870 INFO L82 PathProgramCache]: Analyzing trace with hash 285815716, now seen corresponding path program 177 times [2021-06-05 17:00:49,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:49,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431443180] [2021-06-05 17:00:49,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:49,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:49,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431443180] [2021-06-05 17:00:49,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431443180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:49,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014508484] [2021-06-05 17:00:49,915 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:49,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 17:00:49,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:49,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:00:49,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:50,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014508484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:50,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:50,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:00:50,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955804839] [2021-06-05 17:00:50,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:00:50,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:50,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:00:50,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:00:50,068 INFO L87 Difference]: Start difference. First operand 49212 states and 174168 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:52,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:52,039 INFO L93 Difference]: Finished difference Result 89822 states and 308266 transitions. [2021-06-05 17:00:52,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 17:00:52,039 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:00:52,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:52,248 INFO L225 Difference]: With dead ends: 89822 [2021-06-05 17:00:52,248 INFO L226 Difference]: Without dead ends: 89810 [2021-06-05 17:00:52,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3114 ImplicationChecksByTransitivity, 887.6ms TimeCoverageRelationStatistics Valid=1756, Invalid=6616, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 17:00:52,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89810 states. [2021-06-05 17:00:53,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89810 to 49210. [2021-06-05 17:00:53,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49210 states, 49209 states have (on average 3.539250950029466) internal successors, (174163), 49209 states have internal predecessors, (174163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49210 states to 49210 states and 174163 transitions. [2021-06-05 17:00:53,902 INFO L78 Accepts]: Start accepts. Automaton has 49210 states and 174163 transitions. Word has length 38 [2021-06-05 17:00:53,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:53,902 INFO L482 AbstractCegarLoop]: Abstraction has 49210 states and 174163 transitions. [2021-06-05 17:00:53,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:53,902 INFO L276 IsEmpty]: Start isEmpty. Operand 49210 states and 174163 transitions. [2021-06-05 17:00:53,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:00:53,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:53,977 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:00:54,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 17:00:54,177 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:54,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:54,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1137058970, now seen corresponding path program 178 times [2021-06-05 17:00:54,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:54,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452837137] [2021-06-05 17:00:54,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:54,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:54,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452837137] [2021-06-05 17:00:54,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452837137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:54,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858160320] [2021-06-05 17:00:54,230 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:54,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:54,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:54,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:00:54,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:54,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858160320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:54,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:54,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:00:54,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673944198] [2021-06-05 17:00:54,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:00:54,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:54,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:00:54,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:00:54,388 INFO L87 Difference]: Start difference. First operand 49210 states and 174163 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:56,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:56,622 INFO L93 Difference]: Finished difference Result 109614 states and 376471 transitions. [2021-06-05 17:00:56,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 17:00:56,622 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:00:56,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:56,889 INFO L225 Difference]: With dead ends: 109614 [2021-06-05 17:00:56,890 INFO L226 Difference]: Without dead ends: 109614 [2021-06-05 17:00:56,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4548 ImplicationChecksByTransitivity, 1039.6ms TimeCoverageRelationStatistics Valid=2218, Invalid=8912, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 17:00:57,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109614 states. [2021-06-05 17:00:58,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109614 to 49314. [2021-06-05 17:00:58,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49314 states, 49313 states have (on average 3.5432847322207124) internal successors, (174730), 49313 states have internal predecessors, (174730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:59,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49314 states to 49314 states and 174730 transitions. [2021-06-05 17:00:59,029 INFO L78 Accepts]: Start accepts. Automaton has 49314 states and 174730 transitions. Word has length 38 [2021-06-05 17:00:59,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:59,029 INFO L482 AbstractCegarLoop]: Abstraction has 49314 states and 174730 transitions. [2021-06-05 17:00:59,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:59,029 INFO L276 IsEmpty]: Start isEmpty. Operand 49314 states and 174730 transitions. [2021-06-05 17:00:59,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:00:59,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:59,099 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:00:59,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:59,299 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:59,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:59,300 INFO L82 PathProgramCache]: Analyzing trace with hash 129485782, now seen corresponding path program 179 times [2021-06-05 17:00:59,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:59,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699140909] [2021-06-05 17:00:59,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:59,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:59,345 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:59,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:59,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699140909] [2021-06-05 17:00:59,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699140909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:59,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37515914] [2021-06-05 17:00:59,345 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:59,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 17:00:59,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:59,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:00:59,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:59,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37515914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:59,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:59,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:00:59,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148776638] [2021-06-05 17:00:59,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:00:59,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:59,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:00:59,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:00:59,509 INFO L87 Difference]: Start difference. First operand 49314 states and 174730 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:01,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:01,697 INFO L93 Difference]: Finished difference Result 110094 states and 377678 transitions. [2021-06-05 17:01:01,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 17:01:01,697 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:01:01,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:01,967 INFO L225 Difference]: With dead ends: 110094 [2021-06-05 17:01:01,967 INFO L226 Difference]: Without dead ends: 110094 [2021-06-05 17:01:01,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4544 ImplicationChecksByTransitivity, 998.9ms TimeCoverageRelationStatistics Valid=2218, Invalid=8912, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 17:01:02,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110094 states. [2021-06-05 17:01:03,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110094 to 49260. [2021-06-05 17:01:03,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49260 states, 49259 states have (on average 3.541078787632717) internal successors, (174430), 49259 states have internal predecessors, (174430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:04,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49260 states to 49260 states and 174430 transitions. [2021-06-05 17:01:04,058 INFO L78 Accepts]: Start accepts. Automaton has 49260 states and 174430 transitions. Word has length 38 [2021-06-05 17:01:04,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:04,058 INFO L482 AbstractCegarLoop]: Abstraction has 49260 states and 174430 transitions. [2021-06-05 17:01:04,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:04,058 INFO L276 IsEmpty]: Start isEmpty. Operand 49260 states and 174430 transitions. [2021-06-05 17:01:04,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:01:04,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:04,125 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:01:04,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-05 17:01:04,326 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:04,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:04,326 INFO L82 PathProgramCache]: Analyzing trace with hash -990511256, now seen corresponding path program 180 times [2021-06-05 17:01:04,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:04,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811137514] [2021-06-05 17:01:04,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:04,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:04,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811137514] [2021-06-05 17:01:04,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811137514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:04,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999003270] [2021-06-05 17:01:04,378 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:04,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 17:01:04,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:04,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:01:04,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:04,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999003270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:04,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:04,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:01:04,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33917305] [2021-06-05 17:01:04,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:01:04,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:04,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:01:04,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:01:04,532 INFO L87 Difference]: Start difference. First operand 49260 states and 174430 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:06,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:06,486 INFO L93 Difference]: Finished difference Result 90915 states and 311288 transitions. [2021-06-05 17:01:06,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 17:01:06,487 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:01:06,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:06,698 INFO L225 Difference]: With dead ends: 90915 [2021-06-05 17:01:06,698 INFO L226 Difference]: Without dead ends: 90903 [2021-06-05 17:01:06,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3140 ImplicationChecksByTransitivity, 830.2ms TimeCoverageRelationStatistics Valid=1702, Invalid=6670, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 17:01:06,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90903 states. [2021-06-05 17:01:08,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90903 to 49268. [2021-06-05 17:01:08,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49268 states, 49267 states have (on average 3.5411127123632453) internal successors, (174460), 49267 states have internal predecessors, (174460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:08,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49268 states to 49268 states and 174460 transitions. [2021-06-05 17:01:08,679 INFO L78 Accepts]: Start accepts. Automaton has 49268 states and 174460 transitions. Word has length 38 [2021-06-05 17:01:08,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:08,679 INFO L482 AbstractCegarLoop]: Abstraction has 49268 states and 174460 transitions. [2021-06-05 17:01:08,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:08,679 INFO L276 IsEmpty]: Start isEmpty. Operand 49268 states and 174460 transitions. [2021-06-05 17:01:08,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:01:08,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:08,758 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:01:08,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:08,959 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:08,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:08,959 INFO L82 PathProgramCache]: Analyzing trace with hash -720001564, now seen corresponding path program 181 times [2021-06-05 17:01:08,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:08,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005221129] [2021-06-05 17:01:08,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:09,009 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:09,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:09,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005221129] [2021-06-05 17:01:09,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005221129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:09,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750296650] [2021-06-05 17:01:09,010 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:09,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:09,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:01:09,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:09,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750296650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:09,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:09,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:01:09,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721354478] [2021-06-05 17:01:09,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:01:09,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:09,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:01:09,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:01:09,162 INFO L87 Difference]: Start difference. First operand 49268 states and 174460 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:11,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:11,166 INFO L93 Difference]: Finished difference Result 92540 states and 315646 transitions. [2021-06-05 17:01:11,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 17:01:11,166 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:01:11,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:11,400 INFO L225 Difference]: With dead ends: 92540 [2021-06-05 17:01:11,400 INFO L226 Difference]: Without dead ends: 92540 [2021-06-05 17:01:11,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3584 ImplicationChecksByTransitivity, 837.3ms TimeCoverageRelationStatistics Valid=1747, Invalid=7183, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 17:01:11,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92540 states. [2021-06-05 17:01:12,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92540 to 49268. [2021-06-05 17:01:12,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49268 states, 49267 states have (on average 3.541153307487771) internal successors, (174462), 49267 states have internal predecessors, (174462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:12,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49268 states to 49268 states and 174462 transitions. [2021-06-05 17:01:12,959 INFO L78 Accepts]: Start accepts. Automaton has 49268 states and 174462 transitions. Word has length 38 [2021-06-05 17:01:12,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:12,959 INFO L482 AbstractCegarLoop]: Abstraction has 49268 states and 174462 transitions. [2021-06-05 17:01:12,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:12,959 INFO L276 IsEmpty]: Start isEmpty. Operand 49268 states and 174462 transitions. [2021-06-05 17:01:13,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:01:13,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:13,026 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:01:13,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 17:01:13,226 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:13,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:13,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1686399906, now seen corresponding path program 182 times [2021-06-05 17:01:13,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:13,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267643360] [2021-06-05 17:01:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:13,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:13,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267643360] [2021-06-05 17:01:13,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267643360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:13,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908849956] [2021-06-05 17:01:13,278 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:13,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:01:13,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:13,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:01:13,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:13,486 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:13,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908849956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:13,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:13,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 17:01:13,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695099992] [2021-06-05 17:01:13,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:01:13,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:13,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:01:13,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:01:13,487 INFO L87 Difference]: Start difference. First operand 49268 states and 174462 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:16,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:16,194 INFO L93 Difference]: Finished difference Result 88067 states and 300466 transitions. [2021-06-05 17:01:16,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-06-05 17:01:16,194 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:01:16,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:16,392 INFO L225 Difference]: With dead ends: 88067 [2021-06-05 17:01:16,392 INFO L226 Difference]: Without dead ends: 88067 [2021-06-05 17:01:16,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7081 ImplicationChecksByTransitivity, 1449.9ms TimeCoverageRelationStatistics Valid=2921, Invalid=14109, Unknown=0, NotChecked=0, Total=17030 [2021-06-05 17:01:16,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88067 states. [2021-06-05 17:01:17,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88067 to 49362. [2021-06-05 17:01:18,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49362 states, 49361 states have (on average 3.540305099167359) internal successors, (174753), 49361 states have internal predecessors, (174753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49362 states to 49362 states and 174753 transitions. [2021-06-05 17:01:18,150 INFO L78 Accepts]: Start accepts. Automaton has 49362 states and 174753 transitions. Word has length 38 [2021-06-05 17:01:18,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:18,150 INFO L482 AbstractCegarLoop]: Abstraction has 49362 states and 174753 transitions. [2021-06-05 17:01:18,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:18,150 INFO L276 IsEmpty]: Start isEmpty. Operand 49362 states and 174753 transitions. [2021-06-05 17:01:18,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:01:18,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:18,223 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:01:18,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 17:01:18,423 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:18,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:18,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1553189996, now seen corresponding path program 183 times [2021-06-05 17:01:18,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:18,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858114639] [2021-06-05 17:01:18,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:18,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:18,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858114639] [2021-06-05 17:01:18,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858114639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:18,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623928142] [2021-06-05 17:01:18,469 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:18,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 17:01:18,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:18,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:01:18,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:18,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623928142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:18,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:18,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 17:01:18,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854191509] [2021-06-05 17:01:18,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:01:18,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:18,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:01:18,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:01:18,638 INFO L87 Difference]: Start difference. First operand 49362 states and 174753 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:21,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:21,100 INFO L93 Difference]: Finished difference Result 86322 states and 295792 transitions. [2021-06-05 17:01:21,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-06-05 17:01:21,100 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:01:21,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:21,298 INFO L225 Difference]: With dead ends: 86322 [2021-06-05 17:01:21,298 INFO L226 Difference]: Without dead ends: 86314 [2021-06-05 17:01:21,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5591 ImplicationChecksByTransitivity, 1285.7ms TimeCoverageRelationStatistics Valid=2550, Invalid=11492, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 17:01:21,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86314 states. [2021-06-05 17:01:22,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86314 to 49446. [2021-06-05 17:01:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49446 states, 49445 states have (on average 3.5396298917989686) internal successors, (175017), 49445 states have internal predecessors, (175017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:23,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49446 states to 49446 states and 175017 transitions. [2021-06-05 17:01:23,121 INFO L78 Accepts]: Start accepts. Automaton has 49446 states and 175017 transitions. Word has length 38 [2021-06-05 17:01:23,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:23,121 INFO L482 AbstractCegarLoop]: Abstraction has 49446 states and 175017 transitions. [2021-06-05 17:01:23,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:23,121 INFO L276 IsEmpty]: Start isEmpty. Operand 49446 states and 175017 transitions. [2021-06-05 17:01:23,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:01:23,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:23,204 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:01:23,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:23,404 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:23,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:23,405 INFO L82 PathProgramCache]: Analyzing trace with hash 416893534, now seen corresponding path program 184 times [2021-06-05 17:01:23,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:23,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798414898] [2021-06-05 17:01:23,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:23,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:23,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798414898] [2021-06-05 17:01:23,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798414898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:23,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28694606] [2021-06-05 17:01:23,458 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:23,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:01:23,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:23,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:01:23,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:23,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28694606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:23,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:23,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 17:01:23,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601388605] [2021-06-05 17:01:23,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:01:23,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:23,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:01:23,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:01:23,648 INFO L87 Difference]: Start difference. First operand 49446 states and 175017 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:26,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:26,346 INFO L93 Difference]: Finished difference Result 87555 states and 298307 transitions. [2021-06-05 17:01:26,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-06-05 17:01:26,346 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:01:26,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:26,537 INFO L225 Difference]: With dead ends: 87555 [2021-06-05 17:01:26,538 INFO L226 Difference]: Without dead ends: 87555 [2021-06-05 17:01:26,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7844 ImplicationChecksByTransitivity, 1522.4ms TimeCoverageRelationStatistics Valid=3185, Invalid=15997, Unknown=0, NotChecked=0, Total=19182 [2021-06-05 17:01:26,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87555 states. [2021-06-05 17:01:27,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87555 to 49988. [2021-06-05 17:01:27,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49988 states, 49987 states have (on average 3.5363994638606036) internal successors, (176774), 49987 states have internal predecessors, (176774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:28,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49988 states to 49988 states and 176774 transitions. [2021-06-05 17:01:28,109 INFO L78 Accepts]: Start accepts. Automaton has 49988 states and 176774 transitions. Word has length 38 [2021-06-05 17:01:28,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:28,109 INFO L482 AbstractCegarLoop]: Abstraction has 49988 states and 176774 transitions. [2021-06-05 17:01:28,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:28,109 INFO L276 IsEmpty]: Start isEmpty. Operand 49988 states and 176774 transitions. [2021-06-05 17:01:28,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:01:28,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:28,181 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:01:28,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-06-05 17:01:28,382 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:28,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:28,382 INFO L82 PathProgramCache]: Analyzing trace with hash -638483860, now seen corresponding path program 185 times [2021-06-05 17:01:28,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:28,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155392102] [2021-06-05 17:01:28,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:28,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:28,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155392102] [2021-06-05 17:01:28,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155392102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:28,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423210824] [2021-06-05 17:01:28,461 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:28,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 17:01:28,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:28,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:01:28,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:28,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423210824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:28,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:28,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 17:01:28,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608055771] [2021-06-05 17:01:28,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:01:28,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:28,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:01:28,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:01:28,653 INFO L87 Difference]: Start difference. First operand 49988 states and 176774 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:31,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:31,310 INFO L93 Difference]: Finished difference Result 84986 states and 291271 transitions. [2021-06-05 17:01:31,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-06-05 17:01:31,311 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:01:31,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:31,687 INFO L225 Difference]: With dead ends: 84986 [2021-06-05 17:01:31,688 INFO L226 Difference]: Without dead ends: 84978 [2021-06-05 17:01:31,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6339 ImplicationChecksByTransitivity, 1388.0ms TimeCoverageRelationStatistics Valid=2804, Invalid=13198, Unknown=0, NotChecked=0, Total=16002 [2021-06-05 17:01:31,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84978 states. [2021-06-05 17:01:32,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84978 to 49304. [2021-06-05 17:01:33,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49304 states, 49303 states have (on average 3.5395412043891854) internal successors, (174510), 49303 states have internal predecessors, (174510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:33,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49304 states to 49304 states and 174510 transitions. [2021-06-05 17:01:33,158 INFO L78 Accepts]: Start accepts. Automaton has 49304 states and 174510 transitions. Word has length 38 [2021-06-05 17:01:33,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:33,158 INFO L482 AbstractCegarLoop]: Abstraction has 49304 states and 174510 transitions. [2021-06-05 17:01:33,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:33,158 INFO L276 IsEmpty]: Start isEmpty. Operand 49304 states and 174510 transitions. [2021-06-05 17:01:33,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:01:33,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:33,225 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:01:33,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:33,426 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:33,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:33,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1522835556, now seen corresponding path program 186 times [2021-06-05 17:01:33,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:33,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840787425] [2021-06-05 17:01:33,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:33,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:33,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840787425] [2021-06-05 17:01:33,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840787425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:33,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112938777] [2021-06-05 17:01:33,481 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:33,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 17:01:33,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:33,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:01:33,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:33,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112938777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:33,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:33,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 17:01:33,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467087294] [2021-06-05 17:01:33,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:01:33,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:33,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:01:33,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:01:33,639 INFO L87 Difference]: Start difference. First operand 49304 states and 174510 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:35,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:35,624 INFO L93 Difference]: Finished difference Result 88014 states and 299703 transitions. [2021-06-05 17:01:35,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 17:01:35,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:01:35,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:35,821 INFO L225 Difference]: With dead ends: 88014 [2021-06-05 17:01:35,821 INFO L226 Difference]: Without dead ends: 88014 [2021-06-05 17:01:35,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3648 ImplicationChecksByTransitivity, 1203.2ms TimeCoverageRelationStatistics Valid=2002, Invalid=7898, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 17:01:35,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88014 states. [2021-06-05 17:01:37,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88014 to 49460. [2021-06-05 17:01:37,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49460 states, 49459 states have (on average 3.5380011726884892) internal successors, (174986), 49459 states have internal predecessors, (174986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:37,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49460 states to 49460 states and 174986 transitions. [2021-06-05 17:01:37,469 INFO L78 Accepts]: Start accepts. Automaton has 49460 states and 174986 transitions. Word has length 38 [2021-06-05 17:01:37,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:37,469 INFO L482 AbstractCegarLoop]: Abstraction has 49460 states and 174986 transitions. [2021-06-05 17:01:37,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:37,469 INFO L276 IsEmpty]: Start isEmpty. Operand 49460 states and 174986 transitions. [2021-06-05 17:01:37,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:01:37,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:37,773 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:01:37,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:37,988 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:37,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:37,988 INFO L82 PathProgramCache]: Analyzing trace with hash 625615890, now seen corresponding path program 187 times [2021-06-05 17:01:37,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:37,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58897469] [2021-06-05 17:01:37,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:38,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:38,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58897469] [2021-06-05 17:01:38,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58897469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:38,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682626499] [2021-06-05 17:01:38,040 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:38,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:01:38,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:38,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682626499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:38,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:38,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 17:01:38,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994835513] [2021-06-05 17:01:38,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:01:38,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:38,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:01:38,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:01:38,186 INFO L87 Difference]: Start difference. First operand 49460 states and 174986 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:40,532 INFO L93 Difference]: Finished difference Result 84626 states and 290197 transitions. [2021-06-05 17:01:40,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 17:01:40,532 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:01:40,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:40,705 INFO L225 Difference]: With dead ends: 84626 [2021-06-05 17:01:40,705 INFO L226 Difference]: Without dead ends: 84618 [2021-06-05 17:01:40,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5623 ImplicationChecksByTransitivity, 1149.8ms TimeCoverageRelationStatistics Valid=2687, Invalid=11119, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 17:01:40,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84618 states. [2021-06-05 17:01:41,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84618 to 51118. [2021-06-05 17:01:42,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51118 states, 51117 states have (on average 3.518575033746112) internal successors, (179859), 51117 states have internal predecessors, (179859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:42,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51118 states to 51118 states and 179859 transitions. [2021-06-05 17:01:42,176 INFO L78 Accepts]: Start accepts. Automaton has 51118 states and 179859 transitions. Word has length 38 [2021-06-05 17:01:42,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:42,176 INFO L482 AbstractCegarLoop]: Abstraction has 51118 states and 179859 transitions. [2021-06-05 17:01:42,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:42,176 INFO L276 IsEmpty]: Start isEmpty. Operand 51118 states and 179859 transitions. [2021-06-05 17:01:42,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:01:42,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:42,248 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:01:42,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 17:01:42,449 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:42,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:42,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1604173334, now seen corresponding path program 188 times [2021-06-05 17:01:42,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:42,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937254805] [2021-06-05 17:01:42,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:42,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:42,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937254805] [2021-06-05 17:01:42,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937254805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:42,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425557965] [2021-06-05 17:01:42,500 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:42,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:01:42,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:42,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:01:42,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:42,647 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:42,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425557965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:42,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:42,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 17:01:42,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030924783] [2021-06-05 17:01:42,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:01:42,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:42,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:01:42,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:01:42,648 INFO L87 Difference]: Start difference. First operand 51118 states and 179859 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:43,620 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 17:01:45,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:45,001 INFO L93 Difference]: Finished difference Result 87263 states and 297494 transitions. [2021-06-05 17:01:45,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-06-05 17:01:45,001 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:01:45,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:45,205 INFO L225 Difference]: With dead ends: 87263 [2021-06-05 17:01:45,205 INFO L226 Difference]: Without dead ends: 87263 [2021-06-05 17:01:45,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6426 ImplicationChecksByTransitivity, 1420.6ms TimeCoverageRelationStatistics Valid=2864, Invalid=12636, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 17:01:45,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87263 states. [2021-06-05 17:01:46,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87263 to 50980. [2021-06-05 17:01:46,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50980 states, 50979 states have (on average 3.5200376625669394) internal successors, (179448), 50979 states have internal predecessors, (179448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:46,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50980 states to 50980 states and 179448 transitions. [2021-06-05 17:01:46,971 INFO L78 Accepts]: Start accepts. Automaton has 50980 states and 179448 transitions. Word has length 38 [2021-06-05 17:01:46,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:46,971 INFO L482 AbstractCegarLoop]: Abstraction has 50980 states and 179448 transitions. [2021-06-05 17:01:46,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:46,972 INFO L276 IsEmpty]: Start isEmpty. Operand 50980 states and 179448 transitions. [2021-06-05 17:01:47,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:01:47,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:47,039 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:01:47,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 17:01:47,239 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:47,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:47,240 INFO L82 PathProgramCache]: Analyzing trace with hash -178854378, now seen corresponding path program 189 times [2021-06-05 17:01:47,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:47,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854866959] [2021-06-05 17:01:47,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:47,299 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:47,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:47,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854866959] [2021-06-05 17:01:47,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854866959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:47,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721551319] [2021-06-05 17:01:47,300 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:47,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:01:47,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:47,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 17:01:47,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:47,452 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 8 treesize of output 7 [2021-06-05 17:01:47,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:47,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:47,463 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 17:01:47,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-06-05 17:01:47,540 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 17:01:47,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 17:01:47,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:47,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:47,549 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 17:01:47,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:31 [2021-06-05 17:01:47,596 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-05 17:01:47,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 17:01:47,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:47,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:47,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 17:01:47,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:43 [2021-06-05 17:01:47,675 INFO L354 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2021-06-05 17:01:47,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 17:01:47,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:47,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:47,695 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 17:01:47,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:55 [2021-06-05 17:01:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 17:01:47,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721551319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:47,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:47,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-06-05 17:01:47,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302486775] [2021-06-05 17:01:47,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 17:01:47,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:47,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 17:01:47,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:01:47,800 INFO L87 Difference]: Start difference. First operand 50980 states and 179448 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:52,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:52,218 INFO L93 Difference]: Finished difference Result 74041 states and 252501 transitions. [2021-06-05 17:01:52,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-06-05 17:01:52,218 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:01:52,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:52,381 INFO L225 Difference]: With dead ends: 74041 [2021-06-05 17:01:52,381 INFO L226 Difference]: Without dead ends: 74011 [2021-06-05 17:01:52,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7230 ImplicationChecksByTransitivity, 2930.5ms TimeCoverageRelationStatistics Valid=2538, Invalid=18342, Unknown=0, NotChecked=0, Total=20880 [2021-06-05 17:01:52,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74011 states. [2021-06-05 17:01:53,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74011 to 51064. [2021-06-05 17:01:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51064 states, 51063 states have (on average 3.51929968861994) internal successors, (179706), 51063 states have internal predecessors, (179706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:53,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51064 states to 51064 states and 179706 transitions. [2021-06-05 17:01:53,668 INFO L78 Accepts]: Start accepts. Automaton has 51064 states and 179706 transitions. Word has length 38 [2021-06-05 17:01:53,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:53,668 INFO L482 AbstractCegarLoop]: Abstraction has 51064 states and 179706 transitions. [2021-06-05 17:01:53,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:53,668 INFO L276 IsEmpty]: Start isEmpty. Operand 51064 states and 179706 transitions. [2021-06-05 17:01:53,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:01:53,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:53,739 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:01:53,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 17:01:53,940 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:53,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:53,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1247707042, now seen corresponding path program 190 times [2021-06-05 17:01:53,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:53,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758889804] [2021-06-05 17:01:53,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:54,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:54,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758889804] [2021-06-05 17:01:54,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758889804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:54,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966534174] [2021-06-05 17:01:54,001 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:54,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:01:54,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:54,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:01:54,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:54,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966534174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:54,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:54,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 17:01:54,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478410286] [2021-06-05 17:01:54,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:01:54,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:54,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:01:54,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:01:54,205 INFO L87 Difference]: Start difference. First operand 51064 states and 179706 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:55,842 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-06-05 17:01:56,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:56,928 INFO L93 Difference]: Finished difference Result 85939 states and 293636 transitions. [2021-06-05 17:01:56,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-06-05 17:01:56,928 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:01:56,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:57,113 INFO L225 Difference]: With dead ends: 85939 [2021-06-05 17:01:57,113 INFO L226 Difference]: Without dead ends: 85939 [2021-06-05 17:01:57,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7169 ImplicationChecksByTransitivity, 1623.5ms TimeCoverageRelationStatistics Valid=2937, Invalid=14885, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 17:01:57,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85939 states. [2021-06-05 17:01:58,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85939 to 52200. [2021-06-05 17:01:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52200 states, 52199 states have (on average 3.5098756681162473) internal successors, (183212), 52199 states have internal predecessors, (183212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:58,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52200 states to 52200 states and 183212 transitions. [2021-06-05 17:01:58,915 INFO L78 Accepts]: Start accepts. Automaton has 52200 states and 183212 transitions. Word has length 38 [2021-06-05 17:01:58,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:58,915 INFO L482 AbstractCegarLoop]: Abstraction has 52200 states and 183212 transitions. [2021-06-05 17:01:58,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:58,915 INFO L276 IsEmpty]: Start isEmpty. Operand 52200 states and 183212 transitions. [2021-06-05 17:01:58,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:01:58,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:58,998 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:01:59,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:59,198 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:59,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:59,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1991882860, now seen corresponding path program 191 times [2021-06-05 17:01:59,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:59,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595323277] [2021-06-05 17:01:59,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:59,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:59,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595323277] [2021-06-05 17:01:59,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595323277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:59,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486752411] [2021-06-05 17:01:59,258 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:59,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 17:01:59,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:59,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:01:59,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:59,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486752411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:59,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:59,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 17:01:59,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419131551] [2021-06-05 17:01:59,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:01:59,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:59,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:01:59,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:01:59,453 INFO L87 Difference]: Start difference. First operand 52200 states and 183212 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:02,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:02,553 INFO L93 Difference]: Finished difference Result 83842 states and 288062 transitions. [2021-06-05 17:02:02,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-06-05 17:02:02,553 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:02:02,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:02,733 INFO L225 Difference]: With dead ends: 83842 [2021-06-05 17:02:02,733 INFO L226 Difference]: Without dead ends: 83834 [2021-06-05 17:02:02,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5784 ImplicationChecksByTransitivity, 1421.5ms TimeCoverageRelationStatistics Valid=2550, Invalid=12212, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 17:02:02,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83834 states. [2021-06-05 17:02:04,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83834 to 51752. [2021-06-05 17:02:04,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51752 states, 51751 states have (on average 3.512936948078298) internal successors, (181798), 51751 states have internal predecessors, (181798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:04,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51752 states to 51752 states and 181798 transitions. [2021-06-05 17:02:04,230 INFO L78 Accepts]: Start accepts. Automaton has 51752 states and 181798 transitions. Word has length 38 [2021-06-05 17:02:04,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:04,230 INFO L482 AbstractCegarLoop]: Abstraction has 51752 states and 181798 transitions. [2021-06-05 17:02:04,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:04,230 INFO L276 IsEmpty]: Start isEmpty. Operand 51752 states and 181798 transitions. [2021-06-05 17:02:04,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:02:04,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:04,299 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:04,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-06-05 17:02:04,499 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:04,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:04,500 INFO L82 PathProgramCache]: Analyzing trace with hash 506814244, now seen corresponding path program 35 times [2021-06-05 17:02:04,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:04,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257735986] [2021-06-05 17:02:04,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:04,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:04,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257735986] [2021-06-05 17:02:04,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257735986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:04,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432391419] [2021-06-05 17:02:04,566 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:04,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 17:02:04,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:04,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:02:04,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:04,842 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 17:02:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:04,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432391419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:04,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:04,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-06-05 17:02:04,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102588974] [2021-06-05 17:02:04,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:02:04,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:04,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:02:04,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:02:04,939 INFO L87 Difference]: Start difference. First operand 51752 states and 181798 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:06,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:06,507 INFO L93 Difference]: Finished difference Result 87578 states and 298938 transitions. [2021-06-05 17:02:06,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 17:02:06,508 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:02:06,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:06,699 INFO L225 Difference]: With dead ends: 87578 [2021-06-05 17:02:06,699 INFO L226 Difference]: Without dead ends: 87578 [2021-06-05 17:02:06,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2733 ImplicationChecksByTransitivity, 854.3ms TimeCoverageRelationStatistics Valid=1654, Invalid=6178, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 17:02:06,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87578 states. [2021-06-05 17:02:08,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87578 to 51862. [2021-06-05 17:02:08,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51862 states, 51861 states have (on average 3.512600991110854) internal successors, (182167), 51861 states have internal predecessors, (182167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:08,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51862 states to 51862 states and 182167 transitions. [2021-06-05 17:02:08,374 INFO L78 Accepts]: Start accepts. Automaton has 51862 states and 182167 transitions. Word has length 38 [2021-06-05 17:02:08,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:08,375 INFO L482 AbstractCegarLoop]: Abstraction has 51862 states and 182167 transitions. [2021-06-05 17:02:08,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:08,375 INFO L276 IsEmpty]: Start isEmpty. Operand 51862 states and 182167 transitions. [2021-06-05 17:02:08,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:02:08,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:08,457 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:08,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:08,658 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:08,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:08,658 INFO L82 PathProgramCache]: Analyzing trace with hash 2050436818, now seen corresponding path program 36 times [2021-06-05 17:02:08,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:08,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717544987] [2021-06-05 17:02:08,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:08,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:08,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717544987] [2021-06-05 17:02:08,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717544987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:08,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077844703] [2021-06-05 17:02:08,720 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:08,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 17:02:08,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:08,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:02:08,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:08,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077844703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:08,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:08,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-06-05 17:02:08,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918093073] [2021-06-05 17:02:08,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:02:08,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:08,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:02:08,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:02:08,874 INFO L87 Difference]: Start difference. First operand 51862 states and 182167 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:10,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:10,904 INFO L93 Difference]: Finished difference Result 89676 states and 304727 transitions. [2021-06-05 17:02:10,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 17:02:10,904 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:02:10,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:11,106 INFO L225 Difference]: With dead ends: 89676 [2021-06-05 17:02:11,107 INFO L226 Difference]: Without dead ends: 89676 [2021-06-05 17:02:11,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4063 ImplicationChecksByTransitivity, 1255.4ms TimeCoverageRelationStatistics Valid=2218, Invalid=8702, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 17:02:11,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89676 states. [2021-06-05 17:02:12,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89676 to 52272. [2021-06-05 17:02:12,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52272 states, 52271 states have (on average 3.50771938551013) internal successors, (183352), 52271 states have internal predecessors, (183352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52272 states to 52272 states and 183352 transitions. [2021-06-05 17:02:12,649 INFO L78 Accepts]: Start accepts. Automaton has 52272 states and 183352 transitions. Word has length 38 [2021-06-05 17:02:12,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:12,649 INFO L482 AbstractCegarLoop]: Abstraction has 52272 states and 183352 transitions. [2021-06-05 17:02:12,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:12,649 INFO L276 IsEmpty]: Start isEmpty. Operand 52272 states and 183352 transitions. [2021-06-05 17:02:12,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:02:12,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:12,730 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:12,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:12,931 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:12,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:12,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1415832814, now seen corresponding path program 37 times [2021-06-05 17:02:12,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:12,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904021532] [2021-06-05 17:02:12,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:12,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:12,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904021532] [2021-06-05 17:02:12,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904021532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:12,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109502849] [2021-06-05 17:02:12,989 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:13,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:02:13,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:13,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109502849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:13,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:13,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-06-05 17:02:13,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413363326] [2021-06-05 17:02:13,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:02:13,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:13,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:02:13,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:02:13,141 INFO L87 Difference]: Start difference. First operand 52272 states and 183352 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:15,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:15,415 INFO L93 Difference]: Finished difference Result 88806 states and 301651 transitions. [2021-06-05 17:02:15,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 17:02:15,415 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:02:15,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:15,610 INFO L225 Difference]: With dead ends: 88806 [2021-06-05 17:02:15,610 INFO L226 Difference]: Without dead ends: 88806 [2021-06-05 17:02:15,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5155 ImplicationChecksByTransitivity, 1166.4ms TimeCoverageRelationStatistics Valid=2634, Invalid=10476, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 17:02:15,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88806 states. [2021-06-05 17:02:16,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88806 to 52838. [2021-06-05 17:02:17,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52838 states, 52837 states have (on average 3.501769593277438) internal successors, (185023), 52837 states have internal predecessors, (185023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:17,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52838 states to 52838 states and 185023 transitions. [2021-06-05 17:02:17,163 INFO L78 Accepts]: Start accepts. Automaton has 52838 states and 185023 transitions. Word has length 38 [2021-06-05 17:02:17,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:17,163 INFO L482 AbstractCegarLoop]: Abstraction has 52838 states and 185023 transitions. [2021-06-05 17:02:17,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:17,163 INFO L276 IsEmpty]: Start isEmpty. Operand 52838 states and 185023 transitions. [2021-06-05 17:02:17,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:02:17,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:17,246 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:17,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:17,447 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:17,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:17,447 INFO L82 PathProgramCache]: Analyzing trace with hash -701252718, now seen corresponding path program 38 times [2021-06-05 17:02:17,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:17,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529733321] [2021-06-05 17:02:17,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:17,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:17,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529733321] [2021-06-05 17:02:17,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529733321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:17,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349274252] [2021-06-05 17:02:17,505 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:17,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:17,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:17,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:02:17,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:17,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349274252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:17,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:17,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-06-05 17:02:17,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3008425] [2021-06-05 17:02:17,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:02:17,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:17,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:02:17,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:02:17,661 INFO L87 Difference]: Start difference. First operand 52838 states and 185023 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:19,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:19,940 INFO L93 Difference]: Finished difference Result 83279 states and 286520 transitions. [2021-06-05 17:02:19,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-06-05 17:02:19,940 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:02:19,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:20,126 INFO L225 Difference]: With dead ends: 83279 [2021-06-05 17:02:20,126 INFO L226 Difference]: Without dead ends: 83275 [2021-06-05 17:02:20,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5316 ImplicationChecksByTransitivity, 1398.9ms TimeCoverageRelationStatistics Valid=2550, Invalid=10790, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 17:02:20,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83275 states. [2021-06-05 17:02:21,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83275 to 53164. [2021-06-05 17:02:21,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53164 states, 53163 states have (on average 3.499727253917198) internal successors, (186056), 53163 states have internal predecessors, (186056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:21,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53164 states to 53164 states and 186056 transitions. [2021-06-05 17:02:21,684 INFO L78 Accepts]: Start accepts. Automaton has 53164 states and 186056 transitions. Word has length 38 [2021-06-05 17:02:21,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:21,684 INFO L482 AbstractCegarLoop]: Abstraction has 53164 states and 186056 transitions. [2021-06-05 17:02:21,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand 53164 states and 186056 transitions. [2021-06-05 17:02:21,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:02:21,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:21,768 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:21,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:21,969 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:21,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:21,969 INFO L82 PathProgramCache]: Analyzing trace with hash 277304726, now seen corresponding path program 39 times [2021-06-05 17:02:21,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:21,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968985911] [2021-06-05 17:02:21,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:21,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:22,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:22,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968985911] [2021-06-05 17:02:22,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968985911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:22,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551611942] [2021-06-05 17:02:22,031 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:22,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 17:02:22,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:22,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:02:22,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:22,299 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 17:02:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:22,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551611942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:22,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:22,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-06-05 17:02:22,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509024218] [2021-06-05 17:02:22,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:02:22,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:22,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:02:22,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:02:22,393 INFO L87 Difference]: Start difference. First operand 53164 states and 186056 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:24,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:24,493 INFO L93 Difference]: Finished difference Result 85756 states and 293417 transitions. [2021-06-05 17:02:24,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-06-05 17:02:24,493 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:02:24,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:24,881 INFO L225 Difference]: With dead ends: 85756 [2021-06-05 17:02:24,881 INFO L226 Difference]: Without dead ends: 85756 [2021-06-05 17:02:24,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6245 ImplicationChecksByTransitivity, 1223.8ms TimeCoverageRelationStatistics Valid=2795, Invalid=12457, Unknown=0, NotChecked=0, Total=15252 [2021-06-05 17:02:24,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85756 states. [2021-06-05 17:02:26,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85756 to 52433. [2021-06-05 17:02:26,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52433 states, 52432 states have (on average 3.506141287763198) internal successors, (183834), 52432 states have internal predecessors, (183834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:26,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52433 states to 52433 states and 183834 transitions. [2021-06-05 17:02:26,271 INFO L78 Accepts]: Start accepts. Automaton has 52433 states and 183834 transitions. Word has length 38 [2021-06-05 17:02:26,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:26,271 INFO L482 AbstractCegarLoop]: Abstraction has 52433 states and 183834 transitions. [2021-06-05 17:02:26,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:26,271 INFO L276 IsEmpty]: Start isEmpty. Operand 52433 states and 183834 transitions. [2021-06-05 17:02:26,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:02:26,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:26,362 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:02:26,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable231 [2021-06-05 17:02:26,578 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:26,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:26,578 INFO L82 PathProgramCache]: Analyzing trace with hash 503037738, now seen corresponding path program 192 times [2021-06-05 17:02:26,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:26,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129070223] [2021-06-05 17:02:26,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:26,627 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:26,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:26,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129070223] [2021-06-05 17:02:26,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129070223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:26,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914947935] [2021-06-05 17:02:26,628 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:26,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 17:02:26,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:26,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:02:26,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:26,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914947935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:26,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:26,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 17:02:26,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874814116] [2021-06-05 17:02:26,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:02:26,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:26,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:02:26,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:02:26,758 INFO L87 Difference]: Start difference. First operand 52433 states and 183834 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:28,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:28,480 INFO L93 Difference]: Finished difference Result 83214 states and 284477 transitions. [2021-06-05 17:02:28,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 17:02:28,480 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:02:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:28,658 INFO L225 Difference]: With dead ends: 83214 [2021-06-05 17:02:28,658 INFO L226 Difference]: Without dead ends: 83190 [2021-06-05 17:02:28,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2829 ImplicationChecksByTransitivity, 738.5ms TimeCoverageRelationStatistics Valid=1450, Invalid=6032, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 17:02:28,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83190 states. [2021-06-05 17:02:30,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83190 to 52549. [2021-06-05 17:02:30,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52549 states, 52548 states have (on average 3.504985917637208) internal successors, (184180), 52548 states have internal predecessors, (184180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:30,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52549 states to 52549 states and 184180 transitions. [2021-06-05 17:02:30,263 INFO L78 Accepts]: Start accepts. Automaton has 52549 states and 184180 transitions. Word has length 38 [2021-06-05 17:02:30,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:30,263 INFO L482 AbstractCegarLoop]: Abstraction has 52549 states and 184180 transitions. [2021-06-05 17:02:30,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:30,263 INFO L276 IsEmpty]: Start isEmpty. Operand 52549 states and 184180 transitions. [2021-06-05 17:02:30,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:02:30,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:30,358 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:02:30,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 17:02:30,558 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:30,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:30,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1891669974, now seen corresponding path program 193 times [2021-06-05 17:02:30,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:30,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299151497] [2021-06-05 17:02:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:30,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:30,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299151497] [2021-06-05 17:02:30,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299151497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:30,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351791947] [2021-06-05 17:02:30,602 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:30,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:02:30,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:30,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351791947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:30,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:30,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-06-05 17:02:30,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935286783] [2021-06-05 17:02:30,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:02:30,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:30,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:02:30,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:02:30,720 INFO L87 Difference]: Start difference. First operand 52549 states and 184180 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:32,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:32,269 INFO L93 Difference]: Finished difference Result 84579 states and 288241 transitions. [2021-06-05 17:02:32,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 17:02:32,270 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:02:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:32,457 INFO L225 Difference]: With dead ends: 84579 [2021-06-05 17:02:32,458 INFO L226 Difference]: Without dead ends: 84579 [2021-06-05 17:02:32,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2576 ImplicationChecksByTransitivity, 823.2ms TimeCoverageRelationStatistics Valid=1277, Invalid=5365, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 17:02:32,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84579 states. [2021-06-05 17:02:33,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84579 to 52551. [2021-06-05 17:02:33,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52551 states, 52550 states have (on average 3.5049476688867744) internal successors, (184185), 52550 states have internal predecessors, (184185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:34,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52551 states to 52551 states and 184185 transitions. [2021-06-05 17:02:34,199 INFO L78 Accepts]: Start accepts. Automaton has 52551 states and 184185 transitions. Word has length 38 [2021-06-05 17:02:34,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:34,200 INFO L482 AbstractCegarLoop]: Abstraction has 52551 states and 184185 transitions. [2021-06-05 17:02:34,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:34,200 INFO L276 IsEmpty]: Start isEmpty. Operand 52551 states and 184185 transitions. [2021-06-05 17:02:34,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:02:34,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:34,285 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:02:34,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 17:02:34,486 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:34,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:34,486 INFO L82 PathProgramCache]: Analyzing trace with hash -2026672726, now seen corresponding path program 194 times [2021-06-05 17:02:34,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:34,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590305200] [2021-06-05 17:02:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:34,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:34,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590305200] [2021-06-05 17:02:34,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590305200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:34,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923334217] [2021-06-05 17:02:34,551 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:34,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:34,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:34,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:02:34,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:34,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923334217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:34,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:34,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 17:02:34,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510021361] [2021-06-05 17:02:34,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:02:34,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:34,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:02:34,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:02:34,710 INFO L87 Difference]: Start difference. First operand 52551 states and 184185 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:37,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:37,464 INFO L93 Difference]: Finished difference Result 94035 states and 317077 transitions. [2021-06-05 17:02:37,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-06-05 17:02:37,465 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:02:37,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:37,681 INFO L225 Difference]: With dead ends: 94035 [2021-06-05 17:02:37,682 INFO L226 Difference]: Without dead ends: 94035 [2021-06-05 17:02:37,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7127 ImplicationChecksByTransitivity, 1737.6ms TimeCoverageRelationStatistics Valid=3417, Invalid=14673, Unknown=0, NotChecked=0, Total=18090 [2021-06-05 17:02:37,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94035 states. [2021-06-05 17:02:39,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94035 to 52773. [2021-06-05 17:02:39,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52773 states, 52772 states have (on average 3.5035245963768666) internal successors, (184888), 52772 states have internal predecessors, (184888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:39,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52773 states to 52773 states and 184888 transitions. [2021-06-05 17:02:39,648 INFO L78 Accepts]: Start accepts. Automaton has 52773 states and 184888 transitions. Word has length 38 [2021-06-05 17:02:39,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:39,648 INFO L482 AbstractCegarLoop]: Abstraction has 52773 states and 184888 transitions. [2021-06-05 17:02:39,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:39,649 INFO L276 IsEmpty]: Start isEmpty. Operand 52773 states and 184888 transitions. [2021-06-05 17:02:39,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:02:39,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:39,740 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:02:39,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 17:02:39,940 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:39,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:39,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1212917176, now seen corresponding path program 195 times [2021-06-05 17:02:39,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:39,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624613549] [2021-06-05 17:02:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:39,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:39,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624613549] [2021-06-05 17:02:39,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624613549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:39,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029310550] [2021-06-05 17:02:39,990 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:40,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 17:02:40,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:40,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:02:40,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:40,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029310550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:40,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:40,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 17:02:40,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945645814] [2021-06-05 17:02:40,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:02:40,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:40,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:02:40,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:02:40,143 INFO L87 Difference]: Start difference. First operand 52773 states and 184888 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:42,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:42,576 INFO L93 Difference]: Finished difference Result 91719 states and 310580 transitions. [2021-06-05 17:02:42,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-06-05 17:02:42,577 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:02:42,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:42,761 INFO L225 Difference]: With dead ends: 91719 [2021-06-05 17:02:42,761 INFO L226 Difference]: Without dead ends: 91695 [2021-06-05 17:02:42,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6087 ImplicationChecksByTransitivity, 1348.6ms TimeCoverageRelationStatistics Valid=3055, Invalid=12197, Unknown=0, NotChecked=0, Total=15252 [2021-06-05 17:02:42,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91695 states. [2021-06-05 17:02:44,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91695 to 52825. [2021-06-05 17:02:44,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52825 states, 52824 states have (on average 3.5029910646675755) internal successors, (185042), 52824 states have internal predecessors, (185042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:44,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52825 states to 52825 states and 185042 transitions. [2021-06-05 17:02:44,378 INFO L78 Accepts]: Start accepts. Automaton has 52825 states and 185042 transitions. Word has length 38 [2021-06-05 17:02:44,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:44,378 INFO L482 AbstractCegarLoop]: Abstraction has 52825 states and 185042 transitions. [2021-06-05 17:02:44,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:44,378 INFO L276 IsEmpty]: Start isEmpty. Operand 52825 states and 185042 transitions. [2021-06-05 17:02:44,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:02:44,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:44,466 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:02:44,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 17:02:44,667 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:44,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:44,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1598915182, now seen corresponding path program 196 times [2021-06-05 17:02:44,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:44,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862338655] [2021-06-05 17:02:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:44,716 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:44,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:44,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862338655] [2021-06-05 17:02:44,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862338655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:44,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033094999] [2021-06-05 17:02:44,716 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:44,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:02:44,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:44,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:02:44,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:44,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033094999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:44,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:44,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 17:02:44,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008489151] [2021-06-05 17:02:44,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:02:44,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:44,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:02:44,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:02:44,850 INFO L87 Difference]: Start difference. First operand 52825 states and 185042 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:46,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:46,887 INFO L93 Difference]: Finished difference Result 88865 states and 302270 transitions. [2021-06-05 17:02:46,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 17:02:46,887 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:02:46,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:47,084 INFO L225 Difference]: With dead ends: 88865 [2021-06-05 17:02:47,084 INFO L226 Difference]: Without dead ends: 88829 [2021-06-05 17:02:47,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3715 ImplicationChecksByTransitivity, 1179.8ms TimeCoverageRelationStatistics Valid=2004, Invalid=7896, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 17:02:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88829 states. [2021-06-05 17:02:48,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88829 to 52833. [2021-06-05 17:02:48,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52833 states, 52832 states have (on average 3.502952755905512) internal successors, (185068), 52832 states have internal predecessors, (185068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:48,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52833 states to 52833 states and 185068 transitions. [2021-06-05 17:02:48,752 INFO L78 Accepts]: Start accepts. Automaton has 52833 states and 185068 transitions. Word has length 38 [2021-06-05 17:02:48,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:48,752 INFO L482 AbstractCegarLoop]: Abstraction has 52833 states and 185068 transitions. [2021-06-05 17:02:48,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:48,752 INFO L276 IsEmpty]: Start isEmpty. Operand 52833 states and 185068 transitions. [2021-06-05 17:02:48,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:02:48,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:48,836 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:02:49,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:49,049 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:49,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:49,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1238313302, now seen corresponding path program 197 times [2021-06-05 17:02:49,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:49,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018474386] [2021-06-05 17:02:49,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:49,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:49,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018474386] [2021-06-05 17:02:49,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018474386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:49,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044515214] [2021-06-05 17:02:49,094 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:49,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 17:02:49,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:49,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:02:49,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:49,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044515214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:49,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:49,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:02:49,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022892507] [2021-06-05 17:02:49,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:02:49,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:49,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:02:49,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:02:49,247 INFO L87 Difference]: Start difference. First operand 52833 states and 185068 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:51,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:51,637 INFO L93 Difference]: Finished difference Result 119244 states and 405382 transitions. [2021-06-05 17:02:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-06-05 17:02:51,637 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:02:51,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:51,919 INFO L225 Difference]: With dead ends: 119244 [2021-06-05 17:02:51,919 INFO L226 Difference]: Without dead ends: 119244 [2021-06-05 17:02:51,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5315 ImplicationChecksByTransitivity, 1368.0ms TimeCoverageRelationStatistics Valid=2759, Invalid=10813, Unknown=0, NotChecked=0, Total=13572 [2021-06-05 17:02:52,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119244 states. [2021-06-05 17:02:53,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119244 to 53030. [2021-06-05 17:02:53,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53030 states, 53029 states have (on average 3.5090799373927473) internal successors, (186083), 53029 states have internal predecessors, (186083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:54,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53030 states to 53030 states and 186083 transitions. [2021-06-05 17:02:54,098 INFO L78 Accepts]: Start accepts. Automaton has 53030 states and 186083 transitions. Word has length 38 [2021-06-05 17:02:54,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:54,098 INFO L482 AbstractCegarLoop]: Abstraction has 53030 states and 186083 transitions. [2021-06-05 17:02:54,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:54,098 INFO L276 IsEmpty]: Start isEmpty. Operand 53030 states and 186083 transitions. [2021-06-05 17:02:54,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:02:54,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:54,187 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:02:54,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-05 17:02:54,388 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:54,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:54,389 INFO L82 PathProgramCache]: Analyzing trace with hash 2049080806, now seen corresponding path program 198 times [2021-06-05 17:02:54,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:54,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527936819] [2021-06-05 17:02:54,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:54,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:54,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527936819] [2021-06-05 17:02:54,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527936819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:54,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937365487] [2021-06-05 17:02:54,435 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:54,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 17:02:54,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:54,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:02:54,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:54,588 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:54,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937365487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:54,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:54,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:02:54,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065019727] [2021-06-05 17:02:54,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:02:54,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:54,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:02:54,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:02:54,589 INFO L87 Difference]: Start difference. First operand 53030 states and 186083 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:57,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:57,006 INFO L93 Difference]: Finished difference Result 119980 states and 407208 transitions. [2021-06-05 17:02:57,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-06-05 17:02:57,006 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:02:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:57,297 INFO L225 Difference]: With dead ends: 119980 [2021-06-05 17:02:57,298 INFO L226 Difference]: Without dead ends: 119980 [2021-06-05 17:02:57,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5340 ImplicationChecksByTransitivity, 1197.0ms TimeCoverageRelationStatistics Valid=2759, Invalid=10813, Unknown=0, NotChecked=0, Total=13572 [2021-06-05 17:02:57,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119980 states. [2021-06-05 17:02:59,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119980 to 52936. [2021-06-05 17:02:59,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52936 states, 52935 states have (on average 3.506016813072636) internal successors, (185591), 52935 states have internal predecessors, (185591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:59,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52936 states to 52936 states and 185591 transitions. [2021-06-05 17:02:59,502 INFO L78 Accepts]: Start accepts. Automaton has 52936 states and 185591 transitions. Word has length 38 [2021-06-05 17:02:59,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:59,502 INFO L482 AbstractCegarLoop]: Abstraction has 52936 states and 185591 transitions. [2021-06-05 17:02:59,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:59,502 INFO L276 IsEmpty]: Start isEmpty. Operand 52936 states and 185591 transitions. [2021-06-05 17:02:59,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:02:59,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:59,590 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:02:59,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:59,790 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:59,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:59,791 INFO L82 PathProgramCache]: Analyzing trace with hash 929083768, now seen corresponding path program 199 times [2021-06-05 17:02:59,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:59,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308803305] [2021-06-05 17:02:59,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:59,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:59,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308803305] [2021-06-05 17:02:59,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308803305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:59,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050505420] [2021-06-05 17:02:59,835 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:59,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:02:59,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:59,967 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:59,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050505420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:59,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:59,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:02:59,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431689629] [2021-06-05 17:02:59,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:02:59,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:59,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:02:59,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:02:59,968 INFO L87 Difference]: Start difference. First operand 52936 states and 185591 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:01,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:01,965 INFO L93 Difference]: Finished difference Result 94619 states and 320953 transitions. [2021-06-05 17:03:01,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 17:03:01,966 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:03:01,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:02,173 INFO L225 Difference]: With dead ends: 94619 [2021-06-05 17:03:02,173 INFO L226 Difference]: Without dead ends: 94599 [2021-06-05 17:03:02,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3624 ImplicationChecksByTransitivity, 890.5ms TimeCoverageRelationStatistics Valid=1985, Invalid=7521, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 17:03:02,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94599 states. [2021-06-05 17:03:03,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94599 to 52956. [2021-06-05 17:03:03,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52956 states, 52955 states have (on average 3.506052308563875) internal successors, (185663), 52955 states have internal predecessors, (185663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52956 states to 52956 states and 185663 transitions. [2021-06-05 17:03:03,889 INFO L78 Accepts]: Start accepts. Automaton has 52956 states and 185663 transitions. Word has length 38 [2021-06-05 17:03:03,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:03,889 INFO L482 AbstractCegarLoop]: Abstraction has 52956 states and 185663 transitions. [2021-06-05 17:03:03,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:03,889 INFO L276 IsEmpty]: Start isEmpty. Operand 52956 states and 185663 transitions. [2021-06-05 17:03:03,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:03:03,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:03,981 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:03:04,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 17:03:04,197 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:04,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:04,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1199593460, now seen corresponding path program 200 times [2021-06-05 17:03:04,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:04,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555160252] [2021-06-05 17:03:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:04,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:04,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555160252] [2021-06-05 17:03:04,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555160252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:04,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789118456] [2021-06-05 17:03:04,570 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:04,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:03:04,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:04,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:03:04,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:04,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789118456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:04,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:04,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:03:04,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649693717] [2021-06-05 17:03:04,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:03:04,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:04,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:03:04,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:03:04,730 INFO L87 Difference]: Start difference. First operand 52956 states and 185663 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:06,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:06,603 INFO L93 Difference]: Finished difference Result 96695 states and 326502 transitions. [2021-06-05 17:03:06,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 17:03:06,603 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:03:06,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:07,065 INFO L225 Difference]: With dead ends: 96695 [2021-06-05 17:03:07,066 INFO L226 Difference]: Without dead ends: 96695 [2021-06-05 17:03:07,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4039 ImplicationChecksByTransitivity, 932.0ms TimeCoverageRelationStatistics Valid=2069, Invalid=8233, Unknown=0, NotChecked=0, Total=10302 [2021-06-05 17:03:07,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96695 states. [2021-06-05 17:03:08,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96695 to 52948. [2021-06-05 17:03:08,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52948 states, 52947 states have (on average 3.5060909966570346) internal successors, (185637), 52947 states have internal predecessors, (185637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:08,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52948 states to 52948 states and 185637 transitions. [2021-06-05 17:03:08,589 INFO L78 Accepts]: Start accepts. Automaton has 52948 states and 185637 transitions. Word has length 38 [2021-06-05 17:03:08,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:08,589 INFO L482 AbstractCegarLoop]: Abstraction has 52948 states and 185637 transitions. [2021-06-05 17:03:08,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:08,589 INFO L276 IsEmpty]: Start isEmpty. Operand 52948 states and 185637 transitions. [2021-06-05 17:03:08,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:03:08,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:08,673 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:03:08,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:08,874 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:08,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:08,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1784621646, now seen corresponding path program 201 times [2021-06-05 17:03:08,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:08,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772103480] [2021-06-05 17:03:08,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:08,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:08,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772103480] [2021-06-05 17:03:08,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772103480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:08,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491495215] [2021-06-05 17:03:08,925 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:08,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 17:03:08,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:08,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:03:08,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:09,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491495215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:09,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:09,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 17:03:09,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810109921] [2021-06-05 17:03:09,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:03:09,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:09,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:03:09,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:03:09,054 INFO L87 Difference]: Start difference. First operand 52948 states and 185637 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:11,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:11,154 INFO L93 Difference]: Finished difference Result 91182 states and 308999 transitions. [2021-06-05 17:03:11,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 17:03:11,154 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:03:11,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:11,349 INFO L225 Difference]: With dead ends: 91182 [2021-06-05 17:03:11,349 INFO L226 Difference]: Without dead ends: 91146 [2021-06-05 17:03:11,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4080 ImplicationChecksByTransitivity, 1227.3ms TimeCoverageRelationStatistics Valid=2126, Invalid=8794, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 17:03:11,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91146 states. [2021-06-05 17:03:12,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91146 to 52958. [2021-06-05 17:03:12,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52958 states, 52957 states have (on average 3.5060520799894253) internal successors, (185670), 52957 states have internal predecessors, (185670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:13,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52958 states to 52958 states and 185670 transitions. [2021-06-05 17:03:13,172 INFO L78 Accepts]: Start accepts. Automaton has 52958 states and 185670 transitions. Word has length 38 [2021-06-05 17:03:13,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:13,172 INFO L482 AbstractCegarLoop]: Abstraction has 52958 states and 185670 transitions. [2021-06-05 17:03:13,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:13,172 INFO L276 IsEmpty]: Start isEmpty. Operand 52958 states and 185670 transitions. [2021-06-05 17:03:13,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:03:13,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:13,255 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:03:13,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:13,455 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:13,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:13,455 INFO L82 PathProgramCache]: Analyzing trace with hash 292616914, now seen corresponding path program 202 times [2021-06-05 17:03:13,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:13,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667390127] [2021-06-05 17:03:13,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:13,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:13,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667390127] [2021-06-05 17:03:13,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667390127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:13,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324762326] [2021-06-05 17:03:13,504 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:13,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:03:13,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:13,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:03:13,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:13,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324762326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:13,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:13,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 17:03:13,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249830569] [2021-06-05 17:03:13,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:03:13,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:13,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:03:13,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:03:13,629 INFO L87 Difference]: Start difference. First operand 52958 states and 185670 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:15,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:15,800 INFO L93 Difference]: Finished difference Result 92092 states and 311846 transitions. [2021-06-05 17:03:15,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-06-05 17:03:15,800 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:03:15,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:15,996 INFO L225 Difference]: With dead ends: 92092 [2021-06-05 17:03:15,997 INFO L226 Difference]: Without dead ends: 92072 [2021-06-05 17:03:15,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5085 ImplicationChecksByTransitivity, 1083.7ms TimeCoverageRelationStatistics Valid=2514, Invalid=10368, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 17:03:16,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92072 states. [2021-06-05 17:03:17,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92072 to 53236. [2021-06-05 17:03:17,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53236 states, 53235 states have (on average 3.5031652108575186) internal successors, (186491), 53235 states have internal predecessors, (186491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:17,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53236 states to 53236 states and 186491 transitions. [2021-06-05 17:03:17,578 INFO L78 Accepts]: Start accepts. Automaton has 53236 states and 186491 transitions. Word has length 38 [2021-06-05 17:03:17,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:17,578 INFO L482 AbstractCegarLoop]: Abstraction has 53236 states and 186491 transitions. [2021-06-05 17:03:17,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:17,578 INFO L276 IsEmpty]: Start isEmpty. Operand 53236 states and 186491 transitions. [2021-06-05 17:03:17,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:03:17,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:17,663 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:03:17,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:17,863 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:17,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:17,864 INFO L82 PathProgramCache]: Analyzing trace with hash 563126606, now seen corresponding path program 203 times [2021-06-05 17:03:17,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:17,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311937847] [2021-06-05 17:03:17,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:17,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:17,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311937847] [2021-06-05 17:03:17,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311937847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:17,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125272809] [2021-06-05 17:03:17,913 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:17,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 17:03:17,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:17,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:03:17,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:18,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125272809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:18,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:18,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 17:03:18,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67383477] [2021-06-05 17:03:18,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:03:18,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:18,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:03:18,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:03:18,047 INFO L87 Difference]: Start difference. First operand 53236 states and 186491 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:18,499 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-06-05 17:03:20,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:20,306 INFO L93 Difference]: Finished difference Result 94651 states and 319037 transitions. [2021-06-05 17:03:20,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-06-05 17:03:20,306 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:03:20,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:20,510 INFO L225 Difference]: With dead ends: 94651 [2021-06-05 17:03:20,510 INFO L226 Difference]: Without dead ends: 94651 [2021-06-05 17:03:20,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5807 ImplicationChecksByTransitivity, 1378.6ms TimeCoverageRelationStatistics Valid=2693, Invalid=11587, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 17:03:20,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94651 states. [2021-06-05 17:03:22,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94651 to 53214. [2021-06-05 17:03:22,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53214 states, 53213 states have (on average 3.5032792738616503) internal successors, (186420), 53213 states have internal predecessors, (186420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:22,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53214 states to 53214 states and 186420 transitions. [2021-06-05 17:03:22,251 INFO L78 Accepts]: Start accepts. Automaton has 53214 states and 186420 transitions. Word has length 38 [2021-06-05 17:03:22,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:22,251 INFO L482 AbstractCegarLoop]: Abstraction has 53214 states and 186420 transitions. [2021-06-05 17:03:22,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:22,251 INFO L276 IsEmpty]: Start isEmpty. Operand 53214 states and 186420 transitions. [2021-06-05 17:03:22,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:03:22,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:22,341 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:03:22,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 17:03:22,542 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:22,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:22,542 INFO L82 PathProgramCache]: Analyzing trace with hash -587450998, now seen corresponding path program 204 times [2021-06-05 17:03:22,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:22,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83159520] [2021-06-05 17:03:22,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:22,593 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:22,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:22,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83159520] [2021-06-05 17:03:22,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83159520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:22,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724676832] [2021-06-05 17:03:22,593 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:22,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 17:03:22,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:22,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:03:22,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:22,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724676832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:22,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:22,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 17:03:22,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996180884] [2021-06-05 17:03:22,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:03:22,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:22,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:03:22,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:03:22,751 INFO L87 Difference]: Start difference. First operand 53214 states and 186420 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:24,235 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-06-05 17:03:25,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:25,426 INFO L93 Difference]: Finished difference Result 92842 states and 314971 transitions. [2021-06-05 17:03:25,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-06-05 17:03:25,426 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:03:25,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:25,631 INFO L225 Difference]: With dead ends: 92842 [2021-06-05 17:03:25,631 INFO L226 Difference]: Without dead ends: 92842 [2021-06-05 17:03:25,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 1624.5ms TimeCoverageRelationStatistics Valid=3334, Invalid=13436, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 17:03:25,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92842 states. [2021-06-05 17:03:27,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92842 to 53506. [2021-06-05 17:03:27,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53506 states, 53505 states have (on average 3.5010933557611437) internal successors, (187326), 53505 states have internal predecessors, (187326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:27,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53506 states to 53506 states and 187326 transitions. [2021-06-05 17:03:27,432 INFO L78 Accepts]: Start accepts. Automaton has 53506 states and 187326 transitions. Word has length 38 [2021-06-05 17:03:27,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:27,432 INFO L482 AbstractCegarLoop]: Abstraction has 53506 states and 187326 transitions. [2021-06-05 17:03:27,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:27,432 INFO L276 IsEmpty]: Start isEmpty. Operand 53506 states and 187326 transitions. [2021-06-05 17:03:27,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:03:27,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:27,521 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:03:27,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 17:03:27,722 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:27,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:27,722 INFO L82 PathProgramCache]: Analyzing trace with hash -965018166, now seen corresponding path program 205 times [2021-06-05 17:03:27,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:27,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27422463] [2021-06-05 17:03:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:27,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:27,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27422463] [2021-06-05 17:03:27,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27422463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:27,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298893768] [2021-06-05 17:03:27,772 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:27,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:03:27,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:27,919 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:27,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298893768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:27,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:27,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 17:03:27,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930167431] [2021-06-05 17:03:27,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:03:27,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:27,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:03:27,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:03:27,920 INFO L87 Difference]: Start difference. First operand 53506 states and 187326 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:30,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:30,273 INFO L93 Difference]: Finished difference Result 89734 states and 306098 transitions. [2021-06-05 17:03:30,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-06-05 17:03:30,274 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:03:30,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:30,457 INFO L225 Difference]: With dead ends: 89734 [2021-06-05 17:03:30,457 INFO L226 Difference]: Without dead ends: 89710 [2021-06-05 17:03:30,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5798 ImplicationChecksByTransitivity, 1436.3ms TimeCoverageRelationStatistics Valid=2724, Invalid=11796, Unknown=0, NotChecked=0, Total=14520 [2021-06-05 17:03:30,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89710 states. [2021-06-05 17:03:31,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89710 to 53352. [2021-06-05 17:03:31,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53352 states, 53351 states have (on average 3.5003842477179434) internal successors, (186749), 53351 states have internal predecessors, (186749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:31,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53352 states to 53352 states and 186749 transitions. [2021-06-05 17:03:31,976 INFO L78 Accepts]: Start accepts. Automaton has 53352 states and 186749 transitions. Word has length 38 [2021-06-05 17:03:31,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:31,976 INFO L482 AbstractCegarLoop]: Abstraction has 53352 states and 186749 transitions. [2021-06-05 17:03:31,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:31,977 INFO L276 IsEmpty]: Start isEmpty. Operand 53352 states and 186749 transitions. [2021-06-05 17:03:32,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:03:32,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:32,060 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:03:32,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 17:03:32,260 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:32,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:32,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1488101234, now seen corresponding path program 206 times [2021-06-05 17:03:32,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:32,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390419668] [2021-06-05 17:03:32,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:03:32,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:32,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390419668] [2021-06-05 17:03:32,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390419668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:32,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85025886] [2021-06-05 17:03:32,305 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:32,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:03:32,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:32,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:03:32,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:32,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85025886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:32,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:32,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 17:03:32,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661504718] [2021-06-05 17:03:32,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:03:32,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:32,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:03:32,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:03:32,674 INFO L87 Difference]: Start difference. First operand 53352 states and 186749 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:35,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:35,554 INFO L93 Difference]: Finished difference Result 129321 states and 444245 transitions. [2021-06-05 17:03:35,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-06-05 17:03:35,555 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:03:35,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:35,870 INFO L225 Difference]: With dead ends: 129321 [2021-06-05 17:03:35,871 INFO L226 Difference]: Without dead ends: 129321 [2021-06-05 17:03:35,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9016 ImplicationChecksByTransitivity, 1576.0ms TimeCoverageRelationStatistics Valid=4104, Invalid=16488, Unknown=0, NotChecked=0, Total=20592 [2021-06-05 17:03:35,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129321 states. [2021-06-05 17:03:37,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129321 to 53465. [2021-06-05 17:03:37,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53465 states, 53464 states have (on average 3.5038530600029927) internal successors, (187330), 53464 states have internal predecessors, (187330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:38,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53465 states to 53465 states and 187330 transitions. [2021-06-05 17:03:38,101 INFO L78 Accepts]: Start accepts. Automaton has 53465 states and 187330 transitions. Word has length 38 [2021-06-05 17:03:38,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:38,101 INFO L482 AbstractCegarLoop]: Abstraction has 53465 states and 187330 transitions. [2021-06-05 17:03:38,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:38,101 INFO L276 IsEmpty]: Start isEmpty. Operand 53465 states and 187330 transitions. [2021-06-05 17:03:38,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:03:38,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:38,188 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:03:38,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:38,389 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:38,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:38,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1472640438, now seen corresponding path program 207 times [2021-06-05 17:03:38,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:38,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558725904] [2021-06-05 17:03:38,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:03:38,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:38,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558725904] [2021-06-05 17:03:38,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558725904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:38,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131154221] [2021-06-05 17:03:38,436 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:38,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 17:03:38,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:38,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:03:38,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:38,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131154221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:38,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:38,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 17:03:38,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827404659] [2021-06-05 17:03:38,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:03:38,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:38,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:03:38,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:03:38,600 INFO L87 Difference]: Start difference. First operand 53465 states and 187330 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:41,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:41,524 INFO L93 Difference]: Finished difference Result 129838 states and 445576 transitions. [2021-06-05 17:03:41,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-06-05 17:03:41,524 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:03:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:41,826 INFO L225 Difference]: With dead ends: 129838 [2021-06-05 17:03:41,827 INFO L226 Difference]: Without dead ends: 129838 [2021-06-05 17:03:41,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9035 ImplicationChecksByTransitivity, 1616.2ms TimeCoverageRelationStatistics Valid=4130, Invalid=16750, Unknown=0, NotChecked=0, Total=20880 [2021-06-05 17:03:41,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129838 states. [2021-06-05 17:03:43,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129838 to 53383. [2021-06-05 17:03:43,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53383 states, 53382 states have (on average 3.5011052414671613) internal successors, (186896), 53382 states have internal predecessors, (186896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:43,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53383 states to 53383 states and 186896 transitions. [2021-06-05 17:03:43,929 INFO L78 Accepts]: Start accepts. Automaton has 53383 states and 186896 transitions. Word has length 38 [2021-06-05 17:03:43,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:43,929 INFO L482 AbstractCegarLoop]: Abstraction has 53383 states and 186896 transitions. [2021-06-05 17:03:43,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:43,929 INFO L276 IsEmpty]: Start isEmpty. Operand 53383 states and 186896 transitions. [2021-06-05 17:03:44,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:03:44,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:44,015 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 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 17:03:44,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-05 17:03:44,215 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:44,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:44,215 INFO L82 PathProgramCache]: Analyzing trace with hash -571950878, now seen corresponding path program 208 times [2021-06-05 17:03:44,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:44,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468409093] [2021-06-05 17:03:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:03:44,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:44,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468409093] [2021-06-05 17:03:44,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468409093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:44,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9659805] [2021-06-05 17:03:44,260 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:44,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:03:44,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:44,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:03:44,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:44,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9659805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:44,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:44,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 17:03:44,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739583179] [2021-06-05 17:03:44,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:03:44,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:44,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:03:44,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:03:44,411 INFO L87 Difference]: Start difference. First operand 53383 states and 186896 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:47,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:47,102 INFO L93 Difference]: Finished difference Result 106630 states and 361285 transitions. [2021-06-05 17:03:47,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-05 17:03:47,102 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:03:47,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:47,394 INFO L225 Difference]: With dead ends: 106630 [2021-06-05 17:03:47,394 INFO L226 Difference]: Without dead ends: 106630 [2021-06-05 17:03:47,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5342 ImplicationChecksByTransitivity, 1386.1ms TimeCoverageRelationStatistics Valid=2806, Invalid=10076, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 17:03:47,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106630 states. [2021-06-05 17:03:48,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106630 to 53213. [2021-06-05 17:03:48,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53213 states, 53212 states have (on average 3.4980643463880328) internal successors, (186139), 53212 states have internal predecessors, (186139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:49,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53213 states to 53213 states and 186139 transitions. [2021-06-05 17:03:49,051 INFO L78 Accepts]: Start accepts. Automaton has 53213 states and 186139 transitions. Word has length 38 [2021-06-05 17:03:49,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:49,051 INFO L482 AbstractCegarLoop]: Abstraction has 53213 states and 186139 transitions. [2021-06-05 17:03:49,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:49,052 INFO L276 IsEmpty]: Start isEmpty. Operand 53213 states and 186139 transitions. [2021-06-05 17:03:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:03:49,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:49,136 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:03:49,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:49,336 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:49,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:49,337 INFO L82 PathProgramCache]: Analyzing trace with hash -615188510, now seen corresponding path program 209 times [2021-06-05 17:03:49,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:49,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64748965] [2021-06-05 17:03:49,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:49,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:49,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64748965] [2021-06-05 17:03:49,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64748965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:49,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360863907] [2021-06-05 17:03:49,384 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:49,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 17:03:49,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:49,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:03:49,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:49,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360863907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:49,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:49,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 17:03:49,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641236138] [2021-06-05 17:03:49,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:03:49,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:49,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:03:49,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:03:49,550 INFO L87 Difference]: Start difference. First operand 53213 states and 186139 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:51,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:51,923 INFO L93 Difference]: Finished difference Result 85798 states and 294604 transitions. [2021-06-05 17:03:51,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-06-05 17:03:51,923 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:03:51,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:52,120 INFO L225 Difference]: With dead ends: 85798 [2021-06-05 17:03:52,121 INFO L226 Difference]: Without dead ends: 85798 [2021-06-05 17:03:52,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6120 ImplicationChecksByTransitivity, 1219.2ms TimeCoverageRelationStatistics Valid=2542, Invalid=12220, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 17:03:52,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85798 states. [2021-06-05 17:03:53,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85798 to 53257. [2021-06-05 17:03:53,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53257 states, 53256 states have (on average 3.4978406188974014) internal successors, (186281), 53256 states have internal predecessors, (186281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:53,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53257 states to 53257 states and 186281 transitions. [2021-06-05 17:03:53,784 INFO L78 Accepts]: Start accepts. Automaton has 53257 states and 186281 transitions. Word has length 38 [2021-06-05 17:03:53,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:53,785 INFO L482 AbstractCegarLoop]: Abstraction has 53257 states and 186281 transitions. [2021-06-05 17:03:53,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:53,785 INFO L276 IsEmpty]: Start isEmpty. Operand 53257 states and 186281 transitions. [2021-06-05 17:03:53,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:03:53,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:53,867 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:03:54,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 17:03:54,069 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:54,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:54,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1670565904, now seen corresponding path program 210 times [2021-06-05 17:03:54,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:54,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133656539] [2021-06-05 17:03:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:03:54,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:54,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133656539] [2021-06-05 17:03:54,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133656539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:54,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563555150] [2021-06-05 17:03:54,117 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:54,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 17:03:54,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:54,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:03:54,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:03:54,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563555150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:54,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:54,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 17:03:54,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294000042] [2021-06-05 17:03:54,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:03:54,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:54,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:03:54,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:03:54,302 INFO L87 Difference]: Start difference. First operand 53257 states and 186281 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:56,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:56,318 INFO L93 Difference]: Finished difference Result 84209 states and 290143 transitions. [2021-06-05 17:03:56,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 17:03:56,319 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:03:56,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:56,511 INFO L225 Difference]: With dead ends: 84209 [2021-06-05 17:03:56,511 INFO L226 Difference]: Without dead ends: 84201 [2021-06-05 17:03:56,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4267 ImplicationChecksByTransitivity, 1058.7ms TimeCoverageRelationStatistics Valid=2045, Invalid=8875, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 17:03:56,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84201 states. [2021-06-05 17:03:57,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84201 to 53257. [2021-06-05 17:03:57,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53257 states, 53256 states have (on average 3.497803064443443) internal successors, (186279), 53256 states have internal predecessors, (186279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:57,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53257 states to 53257 states and 186279 transitions. [2021-06-05 17:03:57,984 INFO L78 Accepts]: Start accepts. Automaton has 53257 states and 186279 transitions. Word has length 38 [2021-06-05 17:03:57,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:57,984 INFO L482 AbstractCegarLoop]: Abstraction has 53257 states and 186279 transitions. [2021-06-05 17:03:57,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:57,984 INFO L276 IsEmpty]: Start isEmpty. Operand 53257 states and 186279 transitions. [2021-06-05 17:03:58,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:03:58,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:58,070 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 17:03:58,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:58,273 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:58,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:58,273 INFO L82 PathProgramCache]: Analyzing trace with hash -187430966, now seen corresponding path program 211 times [2021-06-05 17:03:58,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:58,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271947949] [2021-06-05 17:03:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:58,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:58,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271947949] [2021-06-05 17:03:58,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271947949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:58,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86554589] [2021-06-05 17:03:58,325 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:58,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:03:58,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:58,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86554589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:58,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:58,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 17:03:58,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169696637] [2021-06-05 17:03:58,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:03:58,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:58,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:03:58,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:03:58,502 INFO L87 Difference]: Start difference. First operand 53257 states and 186279 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:59,352 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-05 17:04:00,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:00,622 INFO L93 Difference]: Finished difference Result 84129 states and 289951 transitions. [2021-06-05 17:04:00,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 17:04:00,622 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 17:04:00,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:00,815 INFO L225 Difference]: With dead ends: 84129 [2021-06-05 17:04:00,815 INFO L226 Difference]: Without dead ends: 84093 [2021-06-05 17:04:00,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4727 ImplicationChecksByTransitivity, 1341.8ms TimeCoverageRelationStatistics Valid=2257, Invalid=9733, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 17:04:00,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84093 states. [2021-06-05 17:04:02,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84093 to 53139. [2021-06-05 17:04:02,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53139 states, 53138 states have (on average 3.4982498400391435) internal successors, (185890), 53138 states have internal predecessors, (185890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:02,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53139 states to 53139 states and 185890 transitions. [2021-06-05 17:04:02,489 INFO L78 Accepts]: Start accepts. Automaton has 53139 states and 185890 transitions. Word has length 38 [2021-06-05 17:04:02,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:02,489 INFO L482 AbstractCegarLoop]: Abstraction has 53139 states and 185890 transitions. [2021-06-05 17:04:02,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:02,489 INFO L276 IsEmpty]: Start isEmpty. Operand 53139 states and 185890 transitions. [2021-06-05 17:04:02,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 17:04:02,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:02,575 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 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 17:04:02,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:02,775 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:02,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:02,776 INFO L82 PathProgramCache]: Analyzing trace with hash 160346532, now seen corresponding path program 212 times [2021-06-05 17:04:02,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:02,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049870524] [2021-06-05 17:04:02,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:02,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:02,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049870524] [2021-06-05 17:04:02,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049870524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:02,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667224893] [2021-06-05 17:04:02,821 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:02,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:02,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:02,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:04:02,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:02,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667224893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:02,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:02,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 17:04:02,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662171109] [2021-06-05 17:04:02,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:04:02,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:02,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:04:02,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:04:02,981 INFO L87 Difference]: Start difference. First operand 53139 states and 185890 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 17:04:04,705 WARN L222 SmtUtils]: Removed 2 from assertion stack [2021-06-05 17:04:04,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 17:04:04,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable252 [2021-06-05 17:04:04,906 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 17:04:04,907 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 17:04:04,909 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 17:04:04,909 INFO L202 PluginConnector]: Adding new model parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:04:04 BasicIcfg [2021-06-05 17:04:04,909 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 17:04:04,909 INFO L168 Benchmark]: Toolchain (without parser) took 800364.06 ms. Allocated memory was 339.7 MB in the beginning and 15.9 GB in the end (delta: 15.6 GB). Free memory was 319.8 MB in the beginning and 13.4 GB in the end (delta: -13.1 GB). Peak memory consumption was 2.5 GB. Max. memory is 16.0 GB. [2021-06-05 17:04:04,909 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 339.7 MB. Free memory is still 320.9 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 17:04:04,909 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.76 ms. Allocated memory is still 339.7 MB. Free memory was 319.6 MB in the beginning and 318.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 17:04:04,910 INFO L168 Benchmark]: Boogie Preprocessor took 15.60 ms. Allocated memory is still 339.7 MB. Free memory was 318.2 MB in the beginning and 317.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 17:04:04,910 INFO L168 Benchmark]: RCFGBuilder took 251.38 ms. Allocated memory is still 339.7 MB. Free memory was 317.2 MB in the beginning and 304.2 MB in the end (delta: 13.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 17:04:04,910 INFO L168 Benchmark]: TraceAbstraction took 800062.18 ms. Allocated memory was 339.7 MB in the beginning and 15.9 GB in the end (delta: 15.6 GB). Free memory was 303.8 MB in the beginning and 13.4 GB in the end (delta: -13.1 GB). Peak memory consumption was 2.5 GB. Max. memory is 16.0 GB. [2021-06-05 17:04:04,910 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 339.7 MB. Free memory is still 320.9 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 29.76 ms. Allocated memory is still 339.7 MB. Free memory was 319.6 MB in the beginning and 318.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.60 ms. Allocated memory is still 339.7 MB. Free memory was 318.2 MB in the beginning and 317.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 251.38 ms. Allocated memory is still 339.7 MB. Free memory was 317.2 MB in the beginning and 304.2 MB in the end (delta: 13.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 800062.18 ms. Allocated memory was 339.7 MB in the beginning and 15.9 GB in the end (delta: 15.6 GB). Free memory was 303.8 MB in the beginning and 13.4 GB in the end (delta: -13.1 GB). Peak memory consumption was 2.5 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (53139states) and FLOYD_HOARE automaton (currently 103 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 12 for 7ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (53139states) and FLOYD_HOARE automaton (currently 103 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 12 for 7ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (53139states) and FLOYD_HOARE automaton (currently 103 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 12 for 7ms.. - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (53139states) and FLOYD_HOARE automaton (currently 103 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 12 for 7ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 44 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 799941.8ms, OverallIterations: 253, TraceHistogramMax: 5, EmptinessCheckTime: 9827.2ms, AutomataDifference: 495401.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 30.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 17907 SDtfs, 146095 SDslu, 189590 SDs, 0 SdLazy, 247507 SolverSat, 24171 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 134281.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28814 GetRequests, 7111 SyntacticMatches, 110 SemanticMatches, 21592 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875346 ImplicationChecksByTransitivity, 293924.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=53506occurred in iteration=245, InterpolantAutomatonStates: 20465, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 170565.9ms AutomataMinimizationTime, 252 MinimizatonAttempts, 4810683 StatesRemovedByMinimization, 251 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 827.1ms SsaConstructionTime, 2484.8ms SatisfiabilityAnalysisTime, 63901.6ms InterpolantComputationTime, 17362 NumberOfCodeBlocks, 17309 NumberOfCodeBlocksAsserted, 1115 NumberOfCheckSat, 16858 ConstructedInterpolants, 399 QuantifiedInterpolants, 125219 SizeOfPredicates, 919 NumberOfNonLiveVariables, 18223 ConjunctsInSsa, 3085 ConjunctsInUnsatCore, 504 InterpolantComputations, 2 PerfectInterpolantSequences, 5096/12881 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown