/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/unroll-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 13:57:13,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:57:13,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:57:13,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 13:57:13,917 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 13:57:13,934 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:57:13,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:57:13,934 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:57:13,934 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:57:13,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:57:13,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:57:13,935 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:57:13,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:57:13,936 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:57:13,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:57:13,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:57:13,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:57:13,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:57:13,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:57:13,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:57:13,945 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:57:13,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:57:13,945 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:57:13,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:57:13,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:57:13,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:57:13,946 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:57:13,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:57:13,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:57:13,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:57:13,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:57:13,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:57:13,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:57:13,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:57:13,946 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:57:13,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:57:13,947 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:57:13,947 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:57:14,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:57:14,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:57:14,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:57:14,158 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:57:14,158 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:57:14,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl [2021-06-05 13:57:14,159 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl' [2021-06-05 13:57:14,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:57:14,183 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:57:14,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:57:14,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:57:14,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:57:14,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:57:14" (1/1) ... [2021-06-05 13:57:14,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:57:14" (1/1) ... [2021-06-05 13:57:14,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:57:14,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:57:14,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:57:14,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:57:14,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:57:14" (1/1) ... [2021-06-05 13:57:14,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:57:14" (1/1) ... [2021-06-05 13:57:14,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:57:14" (1/1) ... [2021-06-05 13:57:14,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:57:14" (1/1) ... [2021-06-05 13:57:14,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:57:14" (1/1) ... [2021-06-05 13:57:14,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:57:14" (1/1) ... [2021-06-05 13:57:14,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:57:14" (1/1) ... [2021-06-05 13:57:14,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:57:14,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:57:14,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:57:14,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:57:14,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:57:14" (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 13:57:14,270 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 13:57:14,270 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 13:57:14,270 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 13:57:14,270 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 13:57:14,270 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 13:57:14,270 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 13:57:14,270 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:57:14,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:57:14,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:57:14,271 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 13:57:14,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:57:14,542 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 13:57:14,542 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 13:57:14,542 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 13:57:14,543 INFO L202 PluginConnector]: Adding new model unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:57:14 BoogieIcfgContainer [2021-06-05 13:57:14,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:57:14,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:57:14,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:57:14,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:57:14,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:57:14" (1/2) ... [2021-06-05 13:57:14,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be18514 and model type unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:57:14, skipping insertion in model container [2021-06-05 13:57:14,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:57:14" (2/2) ... [2021-06-05 13:57:14,548 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.bpl [2021-06-05 13:57:14,552 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:57:14,552 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:57:14,552 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 13:57:14,552 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:57:14,576 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 13:57:14,589 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 13:57:14,602 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:57:14,602 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:57:14,602 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:57:14,602 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:57:14,602 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:57:14,602 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:57:14,602 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:57:14,603 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:57:14,608 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-06-05 13:57:14,614 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:14,615 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:14,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 13:57:14,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:14,619 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:14,619 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:14,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:14,623 INFO L82 PathProgramCache]: Analyzing trace with hash -551954567, now seen corresponding path program 1 times [2021-06-05 13:57:14,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:14,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485264674] [2021-06-05 13:57:14,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:14,709 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 13:57:14,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:14,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485264674] [2021-06-05 13:57:14,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485264674] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:57:14,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:57:14,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:57:14,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143074914] [2021-06-05 13:57:14,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:57:14,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:14,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:57:14,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:57:14,723 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:14,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:14,740 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-06-05 13:57:14,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:57:14,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-06-05 13:57:14,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:14,750 INFO L225 Difference]: With dead ends: 22 [2021-06-05 13:57:14,750 INFO L226 Difference]: Without dead ends: 19 [2021-06-05 13:57:14,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:57:14,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-06-05 13:57:14,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-06-05 13:57:14,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:14,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-06-05 13:57:14,772 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-06-05 13:57:14,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:14,773 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-06-05 13:57:14,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:14,773 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-06-05 13:57:14,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:57:14,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:14,775 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:14,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:57:14,775 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:14,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:14,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1013287513, now seen corresponding path program 1 times [2021-06-05 13:57:14,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:14,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009071898] [2021-06-05 13:57:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:14,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:14,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009071898] [2021-06-05 13:57:14,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009071898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:14,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980189902] [2021-06-05 13:57:14,843 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 13:57:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:14,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 13:57:14,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:14,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980189902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:14,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:14,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-05 13:57:14,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412853027] [2021-06-05 13:57:14,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:57:14,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:14,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:57:14,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:57:14,963 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:15,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:15,001 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-06-05 13:57:15,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:57:15,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 13:57:15,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:15,003 INFO L225 Difference]: With dead ends: 28 [2021-06-05 13:57:15,003 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 13:57:15,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:57:15,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 13:57:15,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-06-05 13:57:15,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:15,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-06-05 13:57:15,012 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-06-05 13:57:15,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:15,012 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-06-05 13:57:15,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:15,013 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-06-05 13:57:15,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:57:15,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:15,015 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:15,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 13:57:15,229 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:15,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:15,230 INFO L82 PathProgramCache]: Analyzing trace with hash 70002620, now seen corresponding path program 1 times [2021-06-05 13:57:15,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:15,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844072735] [2021-06-05 13:57:15,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:15,258 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 13:57:15,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:15,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844072735] [2021-06-05 13:57:15,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844072735] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:57:15,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:57:15,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:57:15,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667968849] [2021-06-05 13:57:15,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:57:15,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:15,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:57:15,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:57:15,265 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:15,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:15,295 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-06-05 13:57:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:57:15,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 13:57:15,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:15,296 INFO L225 Difference]: With dead ends: 22 [2021-06-05 13:57:15,296 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 13:57:15,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:57:15,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 13:57:15,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 13:57:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-06-05 13:57:15,299 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-06-05 13:57:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:15,299 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-06-05 13:57:15,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-06-05 13:57:15,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:57:15,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:15,299 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:15,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 13:57:15,300 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:15,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:15,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1649223530, now seen corresponding path program 2 times [2021-06-05 13:57:15,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:15,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040437928] [2021-06-05 13:57:15,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:15,340 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 13:57:15,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:15,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040437928] [2021-06-05 13:57:15,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040437928] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:57:15,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:57:15,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:57:15,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44365617] [2021-06-05 13:57:15,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:57:15,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:15,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:57:15,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:57:15,343 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:15,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:15,364 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-06-05 13:57:15,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:57:15,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 13:57:15,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:15,366 INFO L225 Difference]: With dead ends: 20 [2021-06-05 13:57:15,366 INFO L226 Difference]: Without dead ends: 20 [2021-06-05 13:57:15,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:57:15,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-06-05 13:57:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-06-05 13:57:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-06-05 13:57:15,372 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-06-05 13:57:15,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:15,373 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-06-05 13:57:15,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:15,373 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-06-05 13:57:15,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:57:15,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:15,373 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:15,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 13:57:15,374 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:15,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:15,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1346416818, now seen corresponding path program 1 times [2021-06-05 13:57:15,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:15,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345293602] [2021-06-05 13:57:15,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:15,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:15,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345293602] [2021-06-05 13:57:15,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345293602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:15,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389513385] [2021-06-05 13:57:15,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:15,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:57:15,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:15,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389513385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:15,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:15,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 13:57:15,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572581981] [2021-06-05 13:57:15,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:57:15,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:15,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:57:15,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:57:15,476 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:15,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:15,487 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-06-05 13:57:15,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:57:15,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:57:15,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:15,488 INFO L225 Difference]: With dead ends: 24 [2021-06-05 13:57:15,488 INFO L226 Difference]: Without dead ends: 24 [2021-06-05 13:57:15,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:57:15,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-06-05 13:57:15,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-06-05 13:57:15,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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 13:57:15,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-06-05 13:57:15,490 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-06-05 13:57:15,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:15,490 INFO L482 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-06-05 13:57:15,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:15,491 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-06-05 13:57:15,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:57:15,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:15,491 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:15,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:15,709 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:15,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:15,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1989220860, now seen corresponding path program 2 times [2021-06-05 13:57:15,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:15,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12988436] [2021-06-05 13:57:15,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:15,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:15,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:15,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12988436] [2021-06-05 13:57:15,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12988436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:15,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100750533] [2021-06-05 13:57:15,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:15,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:15,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:15,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:57:15,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:15,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100750533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:15,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:15,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 13:57:15,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615623727] [2021-06-05 13:57:15,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:57:15,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:15,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:57:15,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:57:15,841 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:15,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:15,865 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-06-05 13:57:15,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:57:15,866 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:57:15,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:15,867 INFO L225 Difference]: With dead ends: 28 [2021-06-05 13:57:15,867 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 13:57:15,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:57:15,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 13:57:15,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-06-05 13:57:15,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 13:57:15,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-06-05 13:57:15,869 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-06-05 13:57:15,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:15,870 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-06-05 13:57:15,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:15,870 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-06-05 13:57:15,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:57:15,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:15,870 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:16,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:16,085 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:16,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:16,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1980193522, now seen corresponding path program 3 times [2021-06-05 13:57:16,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:16,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150406372] [2021-06-05 13:57:16,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:16,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:16,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:16,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150406372] [2021-06-05 13:57:16,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150406372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:16,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088652378] [2021-06-05 13:57:16,165 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 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 13:57:16,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:57:16,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:16,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:57:16,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:16,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088652378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:16,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:16,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 13:57:16,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163831083] [2021-06-05 13:57:16,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:57:16,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:16,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:57:16,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:57:16,233 INFO L87 Difference]: Start difference. First operand 28 states and 51 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:16,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:16,264 INFO L93 Difference]: Finished difference Result 32 states and 59 transitions. [2021-06-05 13:57:16,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:57:16,264 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 13:57:16,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:16,265 INFO L225 Difference]: With dead ends: 32 [2021-06-05 13:57:16,265 INFO L226 Difference]: Without dead ends: 32 [2021-06-05 13:57:16,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:57:16,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-06-05 13:57:16,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-06-05 13:57:16,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 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 13:57:16,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 59 transitions. [2021-06-05 13:57:16,268 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 59 transitions. Word has length 13 [2021-06-05 13:57:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:16,268 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 59 transitions. [2021-06-05 13:57:16,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:16,268 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 59 transitions. [2021-06-05 13:57:16,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:57:16,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:16,268 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:16,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:16,485 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:16,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:16,485 INFO L82 PathProgramCache]: Analyzing trace with hash -477987780, now seen corresponding path program 4 times [2021-06-05 13:57:16,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:16,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092249297] [2021-06-05 13:57:16,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:16,541 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 13:57:16,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:16,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092249297] [2021-06-05 13:57:16,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092249297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:16,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291437019] [2021-06-05 13:57:16,542 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 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 13:57:16,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:16,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:16,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:57:16,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:16,655 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 13:57:16,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291437019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:16,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:16,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 13:57:16,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179909736] [2021-06-05 13:57:16,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:57:16,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:16,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:57:16,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:16,657 INFO L87 Difference]: Start difference. First operand 32 states and 59 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:16,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:16,683 INFO L93 Difference]: Finished difference Result 36 states and 67 transitions. [2021-06-05 13:57:16,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:57:16,684 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:57:16,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:16,684 INFO L225 Difference]: With dead ends: 36 [2021-06-05 13:57:16,685 INFO L226 Difference]: Without dead ends: 36 [2021-06-05 13:57:16,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:16,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-06-05 13:57:16,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-06-05 13:57:16,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 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 13:57:16,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-06-05 13:57:16,687 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 14 [2021-06-05 13:57:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:16,687 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-06-05 13:57:16,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:16,687 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-06-05 13:57:16,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:57:16,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:16,688 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:16,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:16,901 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:16,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:16,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1154250034, now seen corresponding path program 5 times [2021-06-05 13:57:16,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:16,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698237846] [2021-06-05 13:57:16,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:16,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:16,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698237846] [2021-06-05 13:57:16,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698237846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:16,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672949783] [2021-06-05 13:57:16,951 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 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 13:57:16,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:57:16,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:16,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:57:16,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:17,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:17,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 13:57:17,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:57:17,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:17,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:57:17,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 13:57:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:17,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672949783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:17,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:17,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 13:57:17,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253006632] [2021-06-05 13:57:17,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:17,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:17,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:17,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:17,316 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:17,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:17,425 INFO L93 Difference]: Finished difference Result 93 states and 165 transitions. [2021-06-05 13:57:17,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:57:17,426 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:57:17,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:17,428 INFO L225 Difference]: With dead ends: 93 [2021-06-05 13:57:17,428 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 13:57:17,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:17,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 13:57:17,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 49. [2021-06-05 13:57:17,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 106 transitions. [2021-06-05 13:57:17,437 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 106 transitions. Word has length 15 [2021-06-05 13:57:17,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:17,437 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 106 transitions. [2021-06-05 13:57:17,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:17,437 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 106 transitions. [2021-06-05 13:57:17,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:57:17,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:17,438 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:17,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:17,638 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:17,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:17,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1304076458, now seen corresponding path program 6 times [2021-06-05 13:57:17,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:17,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837250332] [2021-06-05 13:57:17,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:17,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:17,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837250332] [2021-06-05 13:57:17,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837250332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:17,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379406585] [2021-06-05 13:57:17,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:57:17,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:57:17,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:17,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:57:17,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:17,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:17,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 13:57:18,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:57:18,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:18,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:57:18,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 13:57:18,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:18,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379406585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:18,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:18,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 13:57:18,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918528985] [2021-06-05 13:57:18,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:18,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:18,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:18,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:18,044 INFO L87 Difference]: Start difference. First operand 49 states and 106 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:18,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:18,116 INFO L93 Difference]: Finished difference Result 103 states and 198 transitions. [2021-06-05 13:57:18,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:57:18,116 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:57:18,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:18,117 INFO L225 Difference]: With dead ends: 103 [2021-06-05 13:57:18,118 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 13:57:18,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:18,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 13:57:18,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 57. [2021-06-05 13:57:18,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.4107142857142856) internal successors, (135), 56 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:18,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 135 transitions. [2021-06-05 13:57:18,133 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 135 transitions. Word has length 15 [2021-06-05 13:57:18,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:18,134 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 135 transitions. [2021-06-05 13:57:18,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:18,134 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 135 transitions. [2021-06-05 13:57:18,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:57:18,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:18,134 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:18,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:18,356 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:18,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:18,356 INFO L82 PathProgramCache]: Analyzing trace with hash 930031036, now seen corresponding path program 7 times [2021-06-05 13:57:18,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:18,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752028524] [2021-06-05 13:57:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:18,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:18,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752028524] [2021-06-05 13:57:18,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752028524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:18,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652807869] [2021-06-05 13:57:18,389 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 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 13:57:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:18,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:57:18,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:18,512 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:18,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 13:57:18,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:57:18,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:18,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:57:18,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 13:57:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:18,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652807869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:18,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:18,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 13:57:18,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808375170] [2021-06-05 13:57:18,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:18,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:18,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:18,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:18,588 INFO L87 Difference]: Start difference. First operand 57 states and 135 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:18,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:18,654 INFO L93 Difference]: Finished difference Result 113 states and 231 transitions. [2021-06-05 13:57:18,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:57:18,655 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:57:18,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:18,656 INFO L225 Difference]: With dead ends: 113 [2021-06-05 13:57:18,656 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 13:57:18,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:18,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 13:57:18,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 66. [2021-06-05 13:57:18,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.5692307692307694) internal successors, (167), 65 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:18,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 167 transitions. [2021-06-05 13:57:18,665 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 167 transitions. Word has length 15 [2021-06-05 13:57:18,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:18,665 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 167 transitions. [2021-06-05 13:57:18,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:18,665 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 167 transitions. [2021-06-05 13:57:18,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:57:18,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:18,666 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:18,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 13:57:18,881 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:18,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:18,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1467886614, now seen corresponding path program 8 times [2021-06-05 13:57:18,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:18,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183840626] [2021-06-05 13:57:18,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:18,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:18,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183840626] [2021-06-05 13:57:18,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183840626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:18,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551473069] [2021-06-05 13:57:18,920 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 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 13:57:18,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:18,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:18,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:57:18,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:19,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:19,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 13:57:19,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:57:19,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:19,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:57:19,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 13:57:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:19,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551473069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:19,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:19,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 13:57:19,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863742307] [2021-06-05 13:57:19,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:19,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:19,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:19,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:19,166 INFO L87 Difference]: Start difference. First operand 66 states and 167 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:19,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:19,232 INFO L93 Difference]: Finished difference Result 124 states and 267 transitions. [2021-06-05 13:57:19,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:57:19,232 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:57:19,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:19,233 INFO L225 Difference]: With dead ends: 124 [2021-06-05 13:57:19,233 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 13:57:19,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 13:57:19,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2021-06-05 13:57:19,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6933333333333334) internal successors, (202), 75 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:19,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 202 transitions. [2021-06-05 13:57:19,237 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 202 transitions. Word has length 15 [2021-06-05 13:57:19,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:19,237 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 202 transitions. [2021-06-05 13:57:19,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:19,238 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 202 transitions. [2021-06-05 13:57:19,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:57:19,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:19,238 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:19,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:19,457 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:19,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:19,457 INFO L82 PathProgramCache]: Analyzing trace with hash 961540348, now seen corresponding path program 9 times [2021-06-05 13:57:19,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:19,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997615733] [2021-06-05 13:57:19,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:19,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:19,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997615733] [2021-06-05 13:57:19,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997615733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:19,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816517007] [2021-06-05 13:57:19,491 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 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 13:57:19,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:57:19,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:19,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:57:19,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:19,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:19,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 13:57:19,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:57:19,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:19,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:57:19,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 13:57:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:19,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816517007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:19,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:19,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 13:57:19,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336858424] [2021-06-05 13:57:19,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:19,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:19,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:19,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:19,696 INFO L87 Difference]: Start difference. First operand 76 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:19,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:19,768 INFO L93 Difference]: Finished difference Result 136 states and 306 transitions. [2021-06-05 13:57:19,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:57:19,768 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:57:19,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:19,769 INFO L225 Difference]: With dead ends: 136 [2021-06-05 13:57:19,769 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 13:57:19,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:19,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 13:57:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 87. [2021-06-05 13:57:19,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.7906976744186047) internal successors, (240), 86 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:19,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 240 transitions. [2021-06-05 13:57:19,772 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 240 transitions. Word has length 15 [2021-06-05 13:57:19,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:19,772 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 240 transitions. [2021-06-05 13:57:19,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:19,772 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 240 transitions. [2021-06-05 13:57:19,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:57:19,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:19,773 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:19,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 13:57:19,985 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:19,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:19,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1850292010, now seen corresponding path program 10 times [2021-06-05 13:57:19,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:19,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098427875] [2021-06-05 13:57:19,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:20,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:20,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098427875] [2021-06-05 13:57:20,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098427875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:20,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358415797] [2021-06-05 13:57:20,016 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 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 13:57:20,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:20,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:20,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:57:20,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:20,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:20,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 13:57:20,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:57:20,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:20,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:57:20,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 13:57:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:20,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358415797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:20,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:20,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 13:57:20,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159859491] [2021-06-05 13:57:20,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:20,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:20,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:20,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:20,226 INFO L87 Difference]: Start difference. First operand 87 states and 240 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:20,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:20,306 INFO L93 Difference]: Finished difference Result 149 states and 348 transitions. [2021-06-05 13:57:20,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:57:20,307 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:57:20,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:20,307 INFO L225 Difference]: With dead ends: 149 [2021-06-05 13:57:20,308 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 13:57:20,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:20,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 13:57:20,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2021-06-05 13:57:20,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:20,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-06-05 13:57:20,311 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 15 [2021-06-05 13:57:20,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:20,312 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-06-05 13:57:20,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-06-05 13:57:20,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:20,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:20,313 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:20,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:20,521 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:20,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:20,521 INFO L82 PathProgramCache]: Analyzing trace with hash -643543428, now seen corresponding path program 11 times [2021-06-05 13:57:20,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:20,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886486368] [2021-06-05 13:57:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:20,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:20,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886486368] [2021-06-05 13:57:20,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886486368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:20,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687866515] [2021-06-05 13:57:20,584 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 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 13:57:20,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:57:20,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:20,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:20,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:20,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687866515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:20,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:20,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:57:20,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698658364] [2021-06-05 13:57:20,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:57:20,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:20,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:57:20,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:20,650 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:20,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:20,738 INFO L93 Difference]: Finished difference Result 171 states and 375 transitions. [2021-06-05 13:57:20,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:57:20,738 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-06-05 13:57:20,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:20,739 INFO L225 Difference]: With dead ends: 171 [2021-06-05 13:57:20,739 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 13:57:20,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:20,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 13:57:20,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 103. [2021-06-05 13:57:20,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.843137254901961) internal successors, (290), 102 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:20,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 290 transitions. [2021-06-05 13:57:20,742 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 290 transitions. Word has length 16 [2021-06-05 13:57:20,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:20,742 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 290 transitions. [2021-06-05 13:57:20,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:20,742 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 290 transitions. [2021-06-05 13:57:20,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:20,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:20,742 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:20,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 13:57:20,961 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:20,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:20,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1421287673, now seen corresponding path program 12 times [2021-06-05 13:57:20,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:20,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487415088] [2021-06-05 13:57:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:21,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:21,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487415088] [2021-06-05 13:57:21,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487415088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:21,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198600371] [2021-06-05 13:57:21,007 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 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 13:57:21,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:57:21,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:21,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:21,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:21,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198600371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:21,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:21,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:57:21,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113989603] [2021-06-05 13:57:21,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:57:21,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:21,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:57:21,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:21,072 INFO L87 Difference]: Start difference. First operand 103 states and 290 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:21,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:21,198 INFO L93 Difference]: Finished difference Result 207 states and 463 transitions. [2021-06-05 13:57:21,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:57:21,199 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-06-05 13:57:21,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:21,199 INFO L225 Difference]: With dead ends: 207 [2021-06-05 13:57:21,200 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 13:57:21,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:21,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 13:57:21,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 125. [2021-06-05 13:57:21,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.838709677419355) internal successors, (352), 124 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:21,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 352 transitions. [2021-06-05 13:57:21,205 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 352 transitions. Word has length 16 [2021-06-05 13:57:21,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:21,205 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 352 transitions. [2021-06-05 13:57:21,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:21,206 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 352 transitions. [2021-06-05 13:57:21,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:21,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:21,206 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:21,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 13:57:21,417 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:21,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:21,417 INFO L82 PathProgramCache]: Analyzing trace with hash 946722458, now seen corresponding path program 13 times [2021-06-05 13:57:21,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:21,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549347360] [2021-06-05 13:57:21,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:21,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:21,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549347360] [2021-06-05 13:57:21,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549347360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:21,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800251445] [2021-06-05 13:57:21,455 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:21,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:21,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:21,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800251445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:21,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:21,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:57:21,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794170940] [2021-06-05 13:57:21,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:57:21,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:21,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:57:21,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:21,502 INFO L87 Difference]: Start difference. First operand 125 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:21,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:21,579 INFO L93 Difference]: Finished difference Result 152 states and 389 transitions. [2021-06-05 13:57:21,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:57:21,579 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 13:57:21,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:21,580 INFO L225 Difference]: With dead ends: 152 [2021-06-05 13:57:21,580 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 13:57:21,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:21,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 13:57:21,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 126. [2021-06-05 13:57:21,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2021-06-05 13:57:21,583 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2021-06-05 13:57:21,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:21,583 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2021-06-05 13:57:21,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:21,583 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2021-06-05 13:57:21,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:21,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:21,584 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:21,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:21,797 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:21,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:21,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1869141191, now seen corresponding path program 14 times [2021-06-05 13:57:21,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:21,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000050863] [2021-06-05 13:57:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:21,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:21,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000050863] [2021-06-05 13:57:21,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000050863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:21,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343337342] [2021-06-05 13:57:21,835 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 13:57:21,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:21,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:21,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:21,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:21,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343337342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:21,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:21,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:57:21,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883729614] [2021-06-05 13:57:21,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:57:21,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:21,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:57:21,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:21,905 INFO L87 Difference]: Start difference. First operand 126 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:21,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:21,937 INFO L93 Difference]: Finished difference Result 214 states and 476 transitions. [2021-06-05 13:57:21,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:57:21,938 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 13:57:21,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:21,938 INFO L225 Difference]: With dead ends: 214 [2021-06-05 13:57:21,938 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 13:57:21,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:21,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 13:57:21,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 126. [2021-06-05 13:57:21,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:21,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2021-06-05 13:57:21,941 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2021-06-05 13:57:21,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:21,942 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2021-06-05 13:57:21,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:21,942 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2021-06-05 13:57:21,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:21,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:21,942 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:22,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 13:57:22,149 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:22,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:22,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1440737642, now seen corresponding path program 15 times [2021-06-05 13:57:22,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:22,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444045290] [2021-06-05 13:57:22,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:22,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:22,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444045290] [2021-06-05 13:57:22,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444045290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:22,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594487530] [2021-06-05 13:57:22,190 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:22,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:57:22,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:22,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:22,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:22,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594487530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:22,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:22,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:57:22,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453486506] [2021-06-05 13:57:22,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:57:22,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:22,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:57:22,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:22,252 INFO L87 Difference]: Start difference. First operand 126 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:22,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:22,305 INFO L93 Difference]: Finished difference Result 211 states and 472 transitions. [2021-06-05 13:57:22,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:57:22,305 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 13:57:22,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:22,306 INFO L225 Difference]: With dead ends: 211 [2021-06-05 13:57:22,306 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 13:57:22,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:22,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 13:57:22,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 132. [2021-06-05 13:57:22,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.8091603053435112) internal successors, (368), 131 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:22,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 368 transitions. [2021-06-05 13:57:22,309 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 368 transitions. Word has length 16 [2021-06-05 13:57:22,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:22,309 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 368 transitions. [2021-06-05 13:57:22,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:22,309 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 368 transitions. [2021-06-05 13:57:22,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:22,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:22,310 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:22,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:22,525 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:22,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:22,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1770939521, now seen corresponding path program 16 times [2021-06-05 13:57:22,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:22,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054617982] [2021-06-05 13:57:22,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:22,559 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 13:57:22,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:22,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054617982] [2021-06-05 13:57:22,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054617982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:22,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131838253] [2021-06-05 13:57:22,560 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 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 13:57:22,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:22,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:22,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:22,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:22,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131838253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:22,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:22,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:57:22,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969044344] [2021-06-05 13:57:22,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:57:22,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:22,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:57:22,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:22,621 INFO L87 Difference]: Start difference. First operand 132 states and 368 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:22,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:22,696 INFO L93 Difference]: Finished difference Result 225 states and 509 transitions. [2021-06-05 13:57:22,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:57:22,697 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 13:57:22,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:22,697 INFO L225 Difference]: With dead ends: 225 [2021-06-05 13:57:22,697 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 13:57:22,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:22,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 13:57:22,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 139. [2021-06-05 13:57:22,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8550724637681157) internal successors, (394), 138 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:22,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 394 transitions. [2021-06-05 13:57:22,701 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 394 transitions. Word has length 16 [2021-06-05 13:57:22,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:22,701 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 394 transitions. [2021-06-05 13:57:22,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:22,701 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 394 transitions. [2021-06-05 13:57:22,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:22,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:22,702 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:22,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:22,921 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:22,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:22,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1114137344, now seen corresponding path program 17 times [2021-06-05 13:57:22,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:22,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393288313] [2021-06-05 13:57:22,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:22,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:22,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393288313] [2021-06-05 13:57:22,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393288313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:22,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872615969] [2021-06-05 13:57:22,960 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 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 13:57:22,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:57:22,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:22,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:22,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:23,015 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:23,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872615969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:23,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:23,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:57:23,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881448864] [2021-06-05 13:57:23,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:57:23,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:23,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:57:23,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:23,017 INFO L87 Difference]: Start difference. First operand 139 states and 394 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:23,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:23,084 INFO L93 Difference]: Finished difference Result 206 states and 478 transitions. [2021-06-05 13:57:23,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:57:23,084 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 13:57:23,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:23,085 INFO L225 Difference]: With dead ends: 206 [2021-06-05 13:57:23,085 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 13:57:23,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:23,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 13:57:23,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 139. [2021-06-05 13:57:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.847826086956522) internal successors, (393), 138 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 393 transitions. [2021-06-05 13:57:23,089 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 393 transitions. Word has length 16 [2021-06-05 13:57:23,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:23,090 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 393 transitions. [2021-06-05 13:57:23,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:23,090 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 393 transitions. [2021-06-05 13:57:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:23,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:23,091 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:23,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:23,301 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:23,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:23,301 INFO L82 PathProgramCache]: Analyzing trace with hash -191718611, now seen corresponding path program 18 times [2021-06-05 13:57:23,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:23,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877825960] [2021-06-05 13:57:23,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:23,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:23,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877825960] [2021-06-05 13:57:23,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877825960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:23,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933489602] [2021-06-05 13:57:23,340 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 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 13:57:23,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:57:23,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:23,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:23,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:23,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933489602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:23,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:23,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:57:23,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608012505] [2021-06-05 13:57:23,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:57:23,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:23,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:57:23,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:23,402 INFO L87 Difference]: Start difference. First operand 139 states and 393 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:23,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:23,440 INFO L93 Difference]: Finished difference Result 231 states and 521 transitions. [2021-06-05 13:57:23,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:57:23,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 13:57:23,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:23,441 INFO L225 Difference]: With dead ends: 231 [2021-06-05 13:57:23,441 INFO L226 Difference]: Without dead ends: 231 [2021-06-05 13:57:23,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:23,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-05 13:57:23,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2021-06-05 13:57:23,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.847826086956522) internal successors, (393), 138 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:23,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 393 transitions. [2021-06-05 13:57:23,444 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 393 transitions. Word has length 16 [2021-06-05 13:57:23,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:23,444 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 393 transitions. [2021-06-05 13:57:23,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:23,444 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 393 transitions. [2021-06-05 13:57:23,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:23,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:23,445 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:23,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:23,661 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:23,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:23,661 INFO L82 PathProgramCache]: Analyzing trace with hash 596475964, now seen corresponding path program 19 times [2021-06-05 13:57:23,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:23,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895676362] [2021-06-05 13:57:23,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:23,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:23,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895676362] [2021-06-05 13:57:23,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895676362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:23,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077630588] [2021-06-05 13:57:23,701 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 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 13:57:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:23,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:23,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:23,773 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:23,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077630588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:23,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:23,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:57:23,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065265998] [2021-06-05 13:57:23,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:57:23,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:23,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:57:23,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:23,774 INFO L87 Difference]: Start difference. First operand 139 states and 393 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:23,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:23,863 INFO L93 Difference]: Finished difference Result 181 states and 451 transitions. [2021-06-05 13:57:23,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:57:23,863 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-06-05 13:57:23,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:23,864 INFO L225 Difference]: With dead ends: 181 [2021-06-05 13:57:23,864 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 13:57:23,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:23,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 13:57:23,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 140. [2021-06-05 13:57:23,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.8345323741007196) internal successors, (394), 139 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:23,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 394 transitions. [2021-06-05 13:57:23,867 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 394 transitions. Word has length 16 [2021-06-05 13:57:23,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:23,867 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 394 transitions. [2021-06-05 13:57:23,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:23,867 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 394 transitions. [2021-06-05 13:57:23,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:23,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:23,867 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:24,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 13:57:24,080 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:24,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:24,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1920765945, now seen corresponding path program 20 times [2021-06-05 13:57:24,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:24,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445772226] [2021-06-05 13:57:24,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:24,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:24,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445772226] [2021-06-05 13:57:24,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445772226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:24,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860361752] [2021-06-05 13:57:24,119 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:57:24,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:24,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:24,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:24,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:24,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:24,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860361752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:24,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:24,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:57:24,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907142696] [2021-06-05 13:57:24,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:57:24,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:24,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:57:24,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:24,191 INFO L87 Difference]: Start difference. First operand 140 states and 394 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:24,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:24,247 INFO L93 Difference]: Finished difference Result 248 states and 551 transitions. [2021-06-05 13:57:24,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:57:24,247 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-06-05 13:57:24,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:24,248 INFO L225 Difference]: With dead ends: 248 [2021-06-05 13:57:24,248 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 13:57:24,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:24,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 13:57:24,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 140. [2021-06-05 13:57:24,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.8345323741007196) internal successors, (394), 139 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:24,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 394 transitions. [2021-06-05 13:57:24,251 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 394 transitions. Word has length 16 [2021-06-05 13:57:24,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:24,252 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 394 transitions. [2021-06-05 13:57:24,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:24,252 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 394 transitions. [2021-06-05 13:57:24,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:24,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:24,252 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:24,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 13:57:24,463 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:24,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:24,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1978593220, now seen corresponding path program 21 times [2021-06-05 13:57:24,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:24,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320898312] [2021-06-05 13:57:24,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:24,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:24,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320898312] [2021-06-05 13:57:24,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320898312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:24,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918121098] [2021-06-05 13:57:24,500 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:57:24,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:57:24,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:24,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:24,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:24,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918121098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:24,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:24,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:57:24,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570938714] [2021-06-05 13:57:24,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:57:24,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:24,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:57:24,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:24,557 INFO L87 Difference]: Start difference. First operand 140 states and 394 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:24,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:24,602 INFO L93 Difference]: Finished difference Result 230 states and 525 transitions. [2021-06-05 13:57:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:57:24,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 13:57:24,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:24,603 INFO L225 Difference]: With dead ends: 230 [2021-06-05 13:57:24,603 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 13:57:24,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:24,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 13:57:24,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 146. [2021-06-05 13:57:24,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8413793103448275) internal successors, (412), 145 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:24,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 412 transitions. [2021-06-05 13:57:24,606 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 412 transitions. Word has length 16 [2021-06-05 13:57:24,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:24,606 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 412 transitions. [2021-06-05 13:57:24,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:24,606 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 412 transitions. [2021-06-05 13:57:24,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:24,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:24,607 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:24,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:24,821 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:24,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:24,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1233083943, now seen corresponding path program 22 times [2021-06-05 13:57:24,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:24,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127021756] [2021-06-05 13:57:24,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:24,851 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 13:57:24,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:24,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127021756] [2021-06-05 13:57:24,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127021756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:24,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466850695] [2021-06-05 13:57:24,852 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 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 13:57:24,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:24,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:24,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:24,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:24,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466850695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:24,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:24,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:57:24,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682415730] [2021-06-05 13:57:24,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:57:24,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:24,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:57:24,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:24,913 INFO L87 Difference]: Start difference. First operand 146 states and 412 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:24,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:24,989 INFO L93 Difference]: Finished difference Result 240 states and 554 transitions. [2021-06-05 13:57:24,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:57:24,990 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 13:57:24,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:24,990 INFO L225 Difference]: With dead ends: 240 [2021-06-05 13:57:24,990 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 13:57:24,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:24,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 13:57:24,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 155. [2021-06-05 13:57:24,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.883116883116883) internal successors, (444), 154 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 444 transitions. [2021-06-05 13:57:24,994 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 444 transitions. Word has length 16 [2021-06-05 13:57:24,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:24,994 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 444 transitions. [2021-06-05 13:57:24,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:24,994 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 444 transitions. [2021-06-05 13:57:24,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:24,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:24,994 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:25,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 13:57:25,208 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:25,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:25,209 INFO L82 PathProgramCache]: Analyzing trace with hash -576281766, now seen corresponding path program 23 times [2021-06-05 13:57:25,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:25,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861505447] [2021-06-05 13:57:25,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:25,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:25,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861505447] [2021-06-05 13:57:25,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861505447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:25,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826597764] [2021-06-05 13:57:25,242 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 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 13:57:25,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:57:25,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:25,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:25,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:25,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826597764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:25,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:25,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:57:25,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476527166] [2021-06-05 13:57:25,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:57:25,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:25,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:57:25,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:25,295 INFO L87 Difference]: Start difference. First operand 155 states and 444 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:25,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:25,369 INFO L93 Difference]: Finished difference Result 229 states and 540 transitions. [2021-06-05 13:57:25,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:57:25,369 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 13:57:25,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:25,370 INFO L225 Difference]: With dead ends: 229 [2021-06-05 13:57:25,370 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 13:57:25,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:25,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 13:57:25,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2021-06-05 13:57:25,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8766233766233764) internal successors, (443), 154 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:25,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 443 transitions. [2021-06-05 13:57:25,373 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 443 transitions. Word has length 16 [2021-06-05 13:57:25,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:25,373 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 443 transitions. [2021-06-05 13:57:25,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:25,373 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 443 transitions. [2021-06-05 13:57:25,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:25,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:25,373 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:25,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:25,589 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:25,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:25,590 INFO L82 PathProgramCache]: Analyzing trace with hash 346136967, now seen corresponding path program 24 times [2021-06-05 13:57:25,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:25,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513701238] [2021-06-05 13:57:25,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:25,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:25,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513701238] [2021-06-05 13:57:25,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513701238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:25,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550384148] [2021-06-05 13:57:25,624 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 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 13:57:25,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:57:25,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:25,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:25,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:25,677 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 13:57:25,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550384148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:25,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:25,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:57:25,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207301010] [2021-06-05 13:57:25,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:57:25,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:25,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:57:25,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:25,678 INFO L87 Difference]: Start difference. First operand 155 states and 443 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:25,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:25,724 INFO L93 Difference]: Finished difference Result 244 states and 562 transitions. [2021-06-05 13:57:25,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:57:25,724 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 13:57:25,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:25,725 INFO L225 Difference]: With dead ends: 244 [2021-06-05 13:57:25,725 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 13:57:25,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:25,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 13:57:25,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 155. [2021-06-05 13:57:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8766233766233764) internal successors, (443), 154 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:25,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 443 transitions. [2021-06-05 13:57:25,728 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 443 transitions. Word has length 16 [2021-06-05 13:57:25,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:25,729 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 443 transitions. [2021-06-05 13:57:25,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:25,729 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 443 transitions. [2021-06-05 13:57:25,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:25,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:25,729 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:25,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 13:57:25,945 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:25,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:25,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1134331542, now seen corresponding path program 25 times [2021-06-05 13:57:25,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:25,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779922885] [2021-06-05 13:57:25,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:25,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:25,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:25,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779922885] [2021-06-05 13:57:25,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779922885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:25,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497086642] [2021-06-05 13:57:25,988 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 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 13:57:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:26,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:26,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:26,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497086642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:26,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:26,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:57:26,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083990484] [2021-06-05 13:57:26,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:57:26,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:26,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:57:26,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:26,046 INFO L87 Difference]: Start difference. First operand 155 states and 443 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:26,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:26,128 INFO L93 Difference]: Finished difference Result 234 states and 546 transitions. [2021-06-05 13:57:26,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:57:26,128 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-06-05 13:57:26,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:26,129 INFO L225 Difference]: With dead ends: 234 [2021-06-05 13:57:26,129 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 13:57:26,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:26,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 13:57:26,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 155. [2021-06-05 13:57:26,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8701298701298703) internal successors, (442), 154 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:26,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 442 transitions. [2021-06-05 13:57:26,133 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 442 transitions. Word has length 16 [2021-06-05 13:57:26,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:26,133 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 442 transitions. [2021-06-05 13:57:26,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:26,133 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 442 transitions. [2021-06-05 13:57:26,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:26,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:26,134 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:26,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:26,349 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:26,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:26,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1382910367, now seen corresponding path program 26 times [2021-06-05 13:57:26,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:26,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847655117] [2021-06-05 13:57:26,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:26,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:26,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847655117] [2021-06-05 13:57:26,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847655117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:26,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856257317] [2021-06-05 13:57:26,400 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 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 13:57:26,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:26,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:26,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:26,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:26,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856257317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:26,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:26,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:57:26,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120281637] [2021-06-05 13:57:26,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:57:26,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:26,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:57:26,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:26,473 INFO L87 Difference]: Start difference. First operand 155 states and 442 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:26,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:26,532 INFO L93 Difference]: Finished difference Result 257 states and 584 transitions. [2021-06-05 13:57:26,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:57:26,532 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-06-05 13:57:26,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:26,533 INFO L225 Difference]: With dead ends: 257 [2021-06-05 13:57:26,533 INFO L226 Difference]: Without dead ends: 257 [2021-06-05 13:57:26,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:26,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-05 13:57:26,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 155. [2021-06-05 13:57:26,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8701298701298703) internal successors, (442), 154 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:26,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 442 transitions. [2021-06-05 13:57:26,537 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 442 transitions. Word has length 16 [2021-06-05 13:57:26,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:26,537 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 442 transitions. [2021-06-05 13:57:26,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 442 transitions. [2021-06-05 13:57:26,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:26,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:26,537 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:26,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:26,753 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:26,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:26,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1671230758, now seen corresponding path program 27 times [2021-06-05 13:57:26,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:26,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294483695] [2021-06-05 13:57:26,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:26,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:26,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294483695] [2021-06-05 13:57:26,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294483695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:26,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122280141] [2021-06-05 13:57:26,788 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 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 13:57:26,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:57:26,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:26,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:26,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:26,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122280141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:26,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:26,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-05 13:57:26,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488008592] [2021-06-05 13:57:26,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:57:26,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:26,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:57:26,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:26,888 INFO L87 Difference]: Start difference. First operand 155 states and 442 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:27,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:27,124 INFO L93 Difference]: Finished difference Result 265 states and 708 transitions. [2021-06-05 13:57:27,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:57:27,125 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 13:57:27,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:27,126 INFO L225 Difference]: With dead ends: 265 [2021-06-05 13:57:27,126 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 13:57:27,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 196.8ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:57:27,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 13:57:27,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 202. [2021-06-05 13:57:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.8208955223880596) internal successors, (567), 201 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 567 transitions. [2021-06-05 13:57:27,130 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 567 transitions. Word has length 16 [2021-06-05 13:57:27,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:27,130 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 567 transitions. [2021-06-05 13:57:27,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:27,130 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 567 transitions. [2021-06-05 13:57:27,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:27,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:27,130 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:27,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:27,347 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:27,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:27,347 INFO L82 PathProgramCache]: Analyzing trace with hash 851197127, now seen corresponding path program 28 times [2021-06-05 13:57:27,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:27,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178149551] [2021-06-05 13:57:27,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:27,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:27,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178149551] [2021-06-05 13:57:27,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178149551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:27,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263637325] [2021-06-05 13:57:27,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:57:27,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:27,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:27,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:27,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:27,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263637325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:27,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:27,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:57:27,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063615153] [2021-06-05 13:57:27,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:57:27,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:27,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:57:27,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:27,459 INFO L87 Difference]: Start difference. First operand 202 states and 567 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:27,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:27,532 INFO L93 Difference]: Finished difference Result 353 states and 820 transitions. [2021-06-05 13:57:27,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:57:27,532 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-06-05 13:57:27,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:27,533 INFO L225 Difference]: With dead ends: 353 [2021-06-05 13:57:27,533 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 13:57:27,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:27,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 13:57:27,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 215. [2021-06-05 13:57:27,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.8598130841121496) internal successors, (612), 214 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:27,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 612 transitions. [2021-06-05 13:57:27,539 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 612 transitions. Word has length 16 [2021-06-05 13:57:27,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:27,539 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 612 transitions. [2021-06-05 13:57:27,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:27,539 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 612 transitions. [2021-06-05 13:57:27,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:27,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:27,539 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:27,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:27,755 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:27,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:27,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1739430209, now seen corresponding path program 29 times [2021-06-05 13:57:27,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:27,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677566829] [2021-06-05 13:57:27,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:27,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:27,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677566829] [2021-06-05 13:57:27,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677566829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:27,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815628471] [2021-06-05 13:57:27,792 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 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 13:57:27,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:57:27,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:27,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:27,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:27,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815628471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:27,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:27,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:57:27,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748535802] [2021-06-05 13:57:27,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:57:27,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:27,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:57:27,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:27,839 INFO L87 Difference]: Start difference. First operand 215 states and 612 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:27,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:27,927 INFO L93 Difference]: Finished difference Result 342 states and 821 transitions. [2021-06-05 13:57:27,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:57:27,927 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 13:57:27,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:27,928 INFO L225 Difference]: With dead ends: 342 [2021-06-05 13:57:27,928 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 13:57:27,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:27,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 13:57:27,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 239. [2021-06-05 13:57:27,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:27,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-06-05 13:57:27,933 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-06-05 13:57:27,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:27,933 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-06-05 13:57:27,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:27,933 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-06-05 13:57:27,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:27,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:27,934 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:28,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:28,145 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:28,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:28,146 INFO L82 PathProgramCache]: Analyzing trace with hash -160209299, now seen corresponding path program 30 times [2021-06-05 13:57:28,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:28,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003013681] [2021-06-05 13:57:28,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:28,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:28,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003013681] [2021-06-05 13:57:28,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003013681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:28,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067717041] [2021-06-05 13:57:28,186 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 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 13:57:28,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:57:28,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:28,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:28,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:28,241 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 13:57:28,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067717041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:28,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:28,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:57:28,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844700254] [2021-06-05 13:57:28,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:57:28,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:28,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:57:28,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:28,242 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:28,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:28,272 INFO L93 Difference]: Finished difference Result 348 states and 838 transitions. [2021-06-05 13:57:28,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:57:28,272 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 13:57:28,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:28,273 INFO L225 Difference]: With dead ends: 348 [2021-06-05 13:57:28,273 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 13:57:28,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:28,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 13:57:28,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 239. [2021-06-05 13:57:28,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:28,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-06-05 13:57:28,278 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-06-05 13:57:28,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:28,278 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-06-05 13:57:28,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:28,278 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-06-05 13:57:28,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:28,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:28,279 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:28,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 13:57:28,497 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:28,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:28,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1889256633, now seen corresponding path program 31 times [2021-06-05 13:57:28,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:28,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815593178] [2021-06-05 13:57:28,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:28,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:28,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815593178] [2021-06-05 13:57:28,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815593178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:28,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545282148] [2021-06-05 13:57:28,527 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:57:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:28,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:28,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:28,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545282148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:28,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:28,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:57:28,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16647153] [2021-06-05 13:57:28,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:57:28,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:28,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:57:28,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:28,590 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:28,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:28,649 INFO L93 Difference]: Finished difference Result 362 states and 868 transitions. [2021-06-05 13:57:28,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:57:28,657 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-06-05 13:57:28,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:28,658 INFO L225 Difference]: With dead ends: 362 [2021-06-05 13:57:28,658 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 13:57:28,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:28,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 13:57:28,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 239. [2021-06-05 13:57:28,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:28,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-06-05 13:57:28,663 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-06-05 13:57:28,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:28,663 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-06-05 13:57:28,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:28,663 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-06-05 13:57:28,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:28,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:28,663 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:28,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 13:57:28,879 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:28,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:28,880 INFO L82 PathProgramCache]: Analyzing trace with hash 344850861, now seen corresponding path program 32 times [2021-06-05 13:57:28,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:28,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937234567] [2021-06-05 13:57:28,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:28,912 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 13:57:28,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:28,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937234567] [2021-06-05 13:57:28,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937234567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:28,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301721820] [2021-06-05 13:57:28,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:57:28,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:28,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:28,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:28,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:28,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301721820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:28,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:28,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:57:28,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759569522] [2021-06-05 13:57:28,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:57:28,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:28,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:57:28,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:28,976 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:29,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:29,040 INFO L93 Difference]: Finished difference Result 346 states and 841 transitions. [2021-06-05 13:57:29,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:57:29,041 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-06-05 13:57:29,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:29,042 INFO L225 Difference]: With dead ends: 346 [2021-06-05 13:57:29,042 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 13:57:29,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:29,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 13:57:29,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 239. [2021-06-05 13:57:29,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-06-05 13:57:29,047 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-06-05 13:57:29,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:29,047 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-06-05 13:57:29,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:29,047 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-06-05 13:57:29,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:29,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:29,048 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:29,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 13:57:29,261 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:29,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:29,261 INFO L82 PathProgramCache]: Analyzing trace with hash 882706439, now seen corresponding path program 33 times [2021-06-05 13:57:29,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:29,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002689244] [2021-06-05 13:57:29,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:29,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:29,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:29,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002689244] [2021-06-05 13:57:29,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002689244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:29,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142361634] [2021-06-05 13:57:29,296 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 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 13:57:29,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:57:29,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:29,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:29,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:29,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142361634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:29,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:29,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:57:29,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56420908] [2021-06-05 13:57:29,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:57:29,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:29,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:57:29,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:29,352 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:29,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:29,462 INFO L93 Difference]: Finished difference Result 402 states and 976 transitions. [2021-06-05 13:57:29,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:57:29,465 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-06-05 13:57:29,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:29,466 INFO L225 Difference]: With dead ends: 402 [2021-06-05 13:57:29,466 INFO L226 Difference]: Without dead ends: 402 [2021-06-05 13:57:29,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:29,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-05 13:57:29,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 254. [2021-06-05 13:57:29,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.932806324110672) internal successors, (742), 253 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:29,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 742 transitions. [2021-06-05 13:57:29,470 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 742 transitions. Word has length 16 [2021-06-05 13:57:29,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:29,470 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 742 transitions. [2021-06-05 13:57:29,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:29,470 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 742 transitions. [2021-06-05 13:57:29,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:29,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:29,471 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:29,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-05 13:57:29,687 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:29,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:29,687 INFO L82 PathProgramCache]: Analyzing trace with hash -256295271, now seen corresponding path program 34 times [2021-06-05 13:57:29,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:29,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393641029] [2021-06-05 13:57:29,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:29,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:29,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393641029] [2021-06-05 13:57:29,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393641029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:29,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946098765] [2021-06-05 13:57:29,720 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:57:29,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:29,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:29,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:29,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:29,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946098765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:29,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:29,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:57:29,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579757650] [2021-06-05 13:57:29,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:57:29,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:29,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:57:29,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:29,775 INFO L87 Difference]: Start difference. First operand 254 states and 742 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:29,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:29,849 INFO L93 Difference]: Finished difference Result 396 states and 995 transitions. [2021-06-05 13:57:29,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:57:29,850 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 13:57:29,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:29,851 INFO L225 Difference]: With dead ends: 396 [2021-06-05 13:57:29,851 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 13:57:29,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:29,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 13:57:29,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 292. [2021-06-05 13:57:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9828178694158076) internal successors, (868), 291 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:29,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 868 transitions. [2021-06-05 13:57:29,856 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 868 transitions. Word has length 16 [2021-06-05 13:57:29,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:29,857 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 868 transitions. [2021-06-05 13:57:29,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:29,857 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 868 transitions. [2021-06-05 13:57:29,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:29,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:29,857 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:30,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:30,073 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:30,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:30,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1322925639, now seen corresponding path program 35 times [2021-06-05 13:57:30,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:30,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355261490] [2021-06-05 13:57:30,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:30,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:30,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355261490] [2021-06-05 13:57:30,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355261490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:30,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151423145] [2021-06-05 13:57:30,106 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 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 13:57:30,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:57:30,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:30,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:30,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:30,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151423145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:30,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:30,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:57:30,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841683393] [2021-06-05 13:57:30,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:57:30,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:30,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:57:30,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:30,166 INFO L87 Difference]: Start difference. First operand 292 states and 868 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:30,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:30,207 INFO L93 Difference]: Finished difference Result 394 states and 992 transitions. [2021-06-05 13:57:30,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:57:30,208 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 13:57:30,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:30,210 INFO L225 Difference]: With dead ends: 394 [2021-06-05 13:57:30,210 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 13:57:30,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:30,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 13:57:30,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 290. [2021-06-05 13:57:30,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.9757785467128026) internal successors, (860), 289 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:30,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 860 transitions. [2021-06-05 13:57:30,215 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 860 transitions. Word has length 16 [2021-06-05 13:57:30,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:30,215 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 860 transitions. [2021-06-05 13:57:30,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:30,215 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 860 transitions. [2021-06-05 13:57:30,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:30,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:30,215 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:30,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 13:57:30,421 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:30,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:30,421 INFO L82 PathProgramCache]: Analyzing trace with hash -406121695, now seen corresponding path program 36 times [2021-06-05 13:57:30,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:30,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702570495] [2021-06-05 13:57:30,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:30,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:30,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702570495] [2021-06-05 13:57:30,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702570495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:30,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902712046] [2021-06-05 13:57:30,454 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 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 13:57:30,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:57:30,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:30,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:30,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:30,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902712046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:30,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:30,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:57:30,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102855327] [2021-06-05 13:57:30,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:57:30,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:30,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:57:30,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:30,519 INFO L87 Difference]: Start difference. First operand 290 states and 860 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:30,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:30,574 INFO L93 Difference]: Finished difference Result 402 states and 1006 transitions. [2021-06-05 13:57:30,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:57:30,575 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-06-05 13:57:30,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:30,576 INFO L225 Difference]: With dead ends: 402 [2021-06-05 13:57:30,576 INFO L226 Difference]: Without dead ends: 402 [2021-06-05 13:57:30,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:30,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-05 13:57:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 286. [2021-06-05 13:57:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-06-05 13:57:30,580 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-06-05 13:57:30,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:30,580 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-06-05 13:57:30,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:30,580 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-06-05 13:57:30,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:30,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:30,581 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:30,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-05 13:57:30,797 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:30,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:30,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1827985799, now seen corresponding path program 37 times [2021-06-05 13:57:30,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:30,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997479093] [2021-06-05 13:57:30,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:30,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:30,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997479093] [2021-06-05 13:57:30,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997479093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:30,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176280848] [2021-06-05 13:57:30,828 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:57:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:30,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:30,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:30,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176280848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:30,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:30,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:57:30,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244450478] [2021-06-05 13:57:30,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:57:30,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:30,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:57:30,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:30,886 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:30,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:30,945 INFO L93 Difference]: Finished difference Result 379 states and 975 transitions. [2021-06-05 13:57:30,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:57:30,947 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-06-05 13:57:30,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:30,948 INFO L225 Difference]: With dead ends: 379 [2021-06-05 13:57:30,948 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 13:57:30,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:30,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 13:57:30,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 286. [2021-06-05 13:57:30,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-06-05 13:57:30,952 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-06-05 13:57:30,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:30,952 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-06-05 13:57:30,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:30,952 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-06-05 13:57:30,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:30,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:30,953 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:31,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:31,168 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:31,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:31,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1929125919, now seen corresponding path program 38 times [2021-06-05 13:57:31,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:31,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794474264] [2021-06-05 13:57:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:31,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:31,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794474264] [2021-06-05 13:57:31,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794474264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:31,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463186610] [2021-06-05 13:57:31,202 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 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 13:57:31,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:31,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:31,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:31,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:31,263 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 13:57:31,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463186610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:31,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:31,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:57:31,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041512411] [2021-06-05 13:57:31,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:57:31,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:31,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:57:31,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:31,264 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:31,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:31,357 INFO L93 Difference]: Finished difference Result 381 states and 987 transitions. [2021-06-05 13:57:31,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:57:31,361 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-06-05 13:57:31,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:31,362 INFO L225 Difference]: With dead ends: 381 [2021-06-05 13:57:31,362 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 13:57:31,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:57:31,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 13:57:31,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 286. [2021-06-05 13:57:31,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:31,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-06-05 13:57:31,367 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-06-05 13:57:31,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:31,367 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-06-05 13:57:31,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:31,367 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-06-05 13:57:31,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:31,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:31,368 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:31,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:31,581 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:31,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:31,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1859495111, now seen corresponding path program 39 times [2021-06-05 13:57:31,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:31,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808071661] [2021-06-05 13:57:31,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:31,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:31,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808071661] [2021-06-05 13:57:31,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808071661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:31,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964757288] [2021-06-05 13:57:31,617 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 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 13:57:31,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:57:31,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:31,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:31,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:31,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964757288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:31,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:31,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:57:31,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852236118] [2021-06-05 13:57:31,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:57:31,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:31,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:57:31,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:31,671 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:31,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:31,803 INFO L93 Difference]: Finished difference Result 438 states and 1131 transitions. [2021-06-05 13:57:31,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:57:31,804 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-06-05 13:57:31,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:31,805 INFO L225 Difference]: With dead ends: 438 [2021-06-05 13:57:31,805 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 13:57:31,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:57:31,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 13:57:31,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 297. [2021-06-05 13:57:31,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9695945945945947) internal successors, (879), 296 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:31,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-06-05 13:57:31,810 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 16 [2021-06-05 13:57:31,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:31,810 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-06-05 13:57:31,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13:57:31,810 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-06-05 13:57:31,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:31,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:31,810 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:32,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:32,026 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:32,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:32,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1523752449, now seen corresponding path program 40 times [2021-06-05 13:57:32,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:32,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809333159] [2021-06-05 13:57:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:32,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:32,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809333159] [2021-06-05 13:57:32,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809333159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:32,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226051189] [2021-06-05 13:57:32,066 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 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 13:57:32,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:32,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:32,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:32,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:32,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226051189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:32,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:32,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-05 13:57:32,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769510976] [2021-06-05 13:57:32,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:57:32,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:32,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:57:32,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:32,121 INFO L87 Difference]: Start difference. First operand 297 states and 879 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:32,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:32,231 INFO L93 Difference]: Finished difference Result 446 states and 1150 transitions. [2021-06-05 13:57:32,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:57:32,233 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 13:57:32,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:32,234 INFO L225 Difference]: With dead ends: 446 [2021-06-05 13:57:32,234 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 13:57:32,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:32,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 13:57:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 344. [2021-06-05 13:57:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.002915451895044) internal successors, (1030), 343 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1030 transitions. [2021-06-05 13:57:32,239 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1030 transitions. Word has length 16 [2021-06-05 13:57:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:32,239 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1030 transitions. [2021-06-05 13:57:32,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1030 transitions. [2021-06-05 13:57:32,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:32,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:32,240 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:32,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:32,455 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:32,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:32,455 INFO L82 PathProgramCache]: Analyzing trace with hash 55468461, now seen corresponding path program 41 times [2021-06-05 13:57:32,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:32,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956348515] [2021-06-05 13:57:32,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:32,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:32,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956348515] [2021-06-05 13:57:32,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956348515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:32,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382743715] [2021-06-05 13:57:32,495 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:32,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:57:32,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:32,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:32,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:32,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382743715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:32,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:32,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-05 13:57:32,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269574456] [2021-06-05 13:57:32,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:57:32,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:32,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:57:32,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:32,556 INFO L87 Difference]: Start difference. First operand 344 states and 1030 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:32,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:32,629 INFO L93 Difference]: Finished difference Result 432 states and 1125 transitions. [2021-06-05 13:57:32,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:57:32,629 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 13:57:32,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:32,630 INFO L225 Difference]: With dead ends: 432 [2021-06-05 13:57:32,631 INFO L226 Difference]: Without dead ends: 432 [2021-06-05 13:57:32,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:32,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-06-05 13:57:32,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 342. [2021-06-05 13:57:32,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9853372434017595) internal successors, (1018), 341 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1018 transitions. [2021-06-05 13:57:32,635 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1018 transitions. Word has length 16 [2021-06-05 13:57:32,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:32,635 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1018 transitions. [2021-06-05 13:57:32,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1018 transitions. [2021-06-05 13:57:32,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:32,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:32,636 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:32,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:32,852 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:32,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:32,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1673578873, now seen corresponding path program 42 times [2021-06-05 13:57:32,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:32,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210797082] [2021-06-05 13:57:32,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:32,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:32,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210797082] [2021-06-05 13:57:32,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210797082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:32,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656026433] [2021-06-05 13:57:32,895 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 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 13:57:32,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:57:32,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:32,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:32,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:32,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656026433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:32,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:32,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 13:57:32,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530565209] [2021-06-05 13:57:32,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:57:32,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:32,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:57:32,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:57:32,955 INFO L87 Difference]: Start difference. First operand 342 states and 1018 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:33,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:33,072 INFO L93 Difference]: Finished difference Result 438 states and 1134 transitions. [2021-06-05 13:57:33,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:57:33,072 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 13:57:33,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:33,074 INFO L225 Difference]: With dead ends: 438 [2021-06-05 13:57:33,074 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 13:57:33,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:57:33,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 13:57:33,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 338. [2021-06-05 13:57:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.979228486646884) internal successors, (1004), 337 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1004 transitions. [2021-06-05 13:57:33,078 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1004 transitions. Word has length 16 [2021-06-05 13:57:33,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:33,078 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1004 transitions. [2021-06-05 13:57:33,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:33,078 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1004 transitions. [2021-06-05 13:57:33,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:33,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:33,079 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:33,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 13:57:33,292 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:33,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:33,292 INFO L82 PathProgramCache]: Analyzing trace with hash 560528621, now seen corresponding path program 43 times [2021-06-05 13:57:33,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:33,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549787805] [2021-06-05 13:57:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:33,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:33,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549787805] [2021-06-05 13:57:33,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549787805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:33,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597494034] [2021-06-05 13:57:33,332 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 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 13:57:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:33,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:33,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:33,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597494034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:33,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:33,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 13:57:33,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707437615] [2021-06-05 13:57:33,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:57:33,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:33,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:57:33,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:57:33,392 INFO L87 Difference]: Start difference. First operand 338 states and 1004 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:33,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:33,531 INFO L93 Difference]: Finished difference Result 417 states and 1108 transitions. [2021-06-05 13:57:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:57:33,532 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 13:57:33,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:33,533 INFO L225 Difference]: With dead ends: 417 [2021-06-05 13:57:33,533 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 13:57:33,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:57:33,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 13:57:33,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 332. [2021-06-05 13:57:33,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.972809667673716) internal successors, (984), 331 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:33,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 984 transitions. [2021-06-05 13:57:33,538 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 984 transitions. Word has length 16 [2021-06-05 13:57:33,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:33,538 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 984 transitions. [2021-06-05 13:57:33,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:33,538 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 984 transitions. [2021-06-05 13:57:33,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:33,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:33,539 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:33,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 13:57:33,756 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:33,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:33,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1098384199, now seen corresponding path program 44 times [2021-06-05 13:57:33,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:33,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114698476] [2021-06-05 13:57:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:33,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:33,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114698476] [2021-06-05 13:57:33,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114698476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:33,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417771992] [2021-06-05 13:57:33,797 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 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 13:57:33,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:33,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:33,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:33,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:33,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417771992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:33,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:33,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 13:57:33,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401105787] [2021-06-05 13:57:33,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:57:33,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:33,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:57:33,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:57:33,859 INFO L87 Difference]: Start difference. First operand 332 states and 984 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:33,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:33,986 INFO L93 Difference]: Finished difference Result 404 states and 1108 transitions. [2021-06-05 13:57:33,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:57:33,987 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 13:57:33,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:33,988 INFO L225 Difference]: With dead ends: 404 [2021-06-05 13:57:33,988 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 13:57:33,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:57:33,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 13:57:33,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 325. [2021-06-05 13:57:33,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9691358024691357) internal successors, (962), 324 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:33,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 962 transitions. [2021-06-05 13:57:33,992 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 962 transitions. Word has length 16 [2021-06-05 13:57:33,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:33,992 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 962 transitions. [2021-06-05 13:57:33,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:33,993 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 962 transitions. [2021-06-05 13:57:33,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:33,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:33,993 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:34,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:34,209 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:34,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:34,209 INFO L82 PathProgramCache]: Analyzing trace with hash 592037933, now seen corresponding path program 45 times [2021-06-05 13:57:34,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:34,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145585481] [2021-06-05 13:57:34,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:34,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:34,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145585481] [2021-06-05 13:57:34,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145585481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:34,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972966830] [2021-06-05 13:57:34,248 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 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 13:57:34,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:57:34,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:34,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:34,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:34,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972966830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:34,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:34,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 13:57:34,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127188090] [2021-06-05 13:57:34,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:57:34,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:34,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:57:34,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:57:34,319 INFO L87 Difference]: Start difference. First operand 325 states and 962 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:34,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:34,444 INFO L93 Difference]: Finished difference Result 408 states and 1118 transitions. [2021-06-05 13:57:34,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:57:34,444 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 13:57:34,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:34,445 INFO L225 Difference]: With dead ends: 408 [2021-06-05 13:57:34,445 INFO L226 Difference]: Without dead ends: 408 [2021-06-05 13:57:34,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:34,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-06-05 13:57:34,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 320. [2021-06-05 13:57:34,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.9655172413793105) internal successors, (946), 319 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:34,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 946 transitions. [2021-06-05 13:57:34,450 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 946 transitions. Word has length 16 [2021-06-05 13:57:34,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:34,450 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 946 transitions. [2021-06-05 13:57:34,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:34,450 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 946 transitions. [2021-06-05 13:57:34,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:34,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:34,450 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:34,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-06-05 13:57:34,666 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:34,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:34,667 INFO L82 PathProgramCache]: Analyzing trace with hash 2075172871, now seen corresponding path program 46 times [2021-06-05 13:57:34,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:34,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489357428] [2021-06-05 13:57:34,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:34,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:34,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489357428] [2021-06-05 13:57:34,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489357428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:34,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464906247] [2021-06-05 13:57:34,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:57:34,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:34,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:34,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:34,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:34,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:34,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464906247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:34,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:34,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 13:57:34,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415125051] [2021-06-05 13:57:34,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:34,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:34,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:34,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:34,775 INFO L87 Difference]: Start difference. First operand 320 states and 946 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 13:57:34,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:34,947 INFO L93 Difference]: Finished difference Result 465 states and 1276 transitions. [2021-06-05 13:57:34,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:57:34,947 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 16 [2021-06-05 13:57:34,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:34,948 INFO L225 Difference]: With dead ends: 465 [2021-06-05 13:57:34,948 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 13:57:34,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:57:34,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 13:57:34,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 317. [2021-06-05 13:57:34,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9936708860759493) internal successors, (946), 316 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:34,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 946 transitions. [2021-06-05 13:57:34,953 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 946 transitions. Word has length 16 [2021-06-05 13:57:34,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:34,953 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 946 transitions. [2021-06-05 13:57:34,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 13:57:34,953 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 946 transitions. [2021-06-05 13:57:34,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:57:34,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:34,954 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:35,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:35,165 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:35,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:35,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1607417494, now seen corresponding path program 47 times [2021-06-05 13:57:35,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:35,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512546227] [2021-06-05 13:57:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:35,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:35,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512546227] [2021-06-05 13:57:35,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512546227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:35,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377310701] [2021-06-05 13:57:35,196 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 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 13:57:35,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:57:35,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:35,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:35,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:57:35,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377310701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:35,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:35,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-05 13:57:35,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976666076] [2021-06-05 13:57:35,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:57:35,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:35,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:57:35,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:35,253 INFO L87 Difference]: Start difference. First operand 317 states and 946 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:35,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:35,291 INFO L93 Difference]: Finished difference Result 414 states and 1090 transitions. [2021-06-05 13:57:35,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:57:35,291 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:57:35,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:35,293 INFO L225 Difference]: With dead ends: 414 [2021-06-05 13:57:35,293 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 13:57:35,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:35,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 13:57:35,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 323. [2021-06-05 13:57:35,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9968944099378882) internal successors, (965), 322 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:35,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 965 transitions. [2021-06-05 13:57:35,300 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 965 transitions. Word has length 17 [2021-06-05 13:57:35,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:35,300 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 965 transitions. [2021-06-05 13:57:35,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:35,300 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 965 transitions. [2021-06-05 13:57:35,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:57:35,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:35,300 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:35,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:35,501 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:35,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:35,501 INFO L82 PathProgramCache]: Analyzing trace with hash 763155816, now seen corresponding path program 48 times [2021-06-05 13:57:35,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:35,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959255711] [2021-06-05 13:57:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:35,549 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:35,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:35,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959255711] [2021-06-05 13:57:35,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959255711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:35,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458817037] [2021-06-05 13:57:35,549 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 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 13:57:35,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:57:35,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:35,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:35,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:35,599 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:35,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458817037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:35,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:35,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 13:57:35,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536173802] [2021-06-05 13:57:35,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:57:35,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:35,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:57:35,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:35,600 INFO L87 Difference]: Start difference. First operand 323 states and 965 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:35,681 INFO L93 Difference]: Finished difference Result 409 states and 1079 transitions. [2021-06-05 13:57:35,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:57:35,681 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:57:35,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:35,682 INFO L225 Difference]: With dead ends: 409 [2021-06-05 13:57:35,682 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 13:57:35,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 13:57:35,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 323. [2021-06-05 13:57:35,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9906832298136647) internal successors, (963), 322 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 963 transitions. [2021-06-05 13:57:35,687 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 963 transitions. Word has length 17 [2021-06-05 13:57:35,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:35,687 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 963 transitions. [2021-06-05 13:57:35,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:35,687 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 963 transitions. [2021-06-05 13:57:35,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:57:35,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:35,687 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:35,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:35,901 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:35,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:35,901 INFO L82 PathProgramCache]: Analyzing trace with hash -2042406484, now seen corresponding path program 49 times [2021-06-05 13:57:35,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:35,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245970161] [2021-06-05 13:57:35,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:35,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:35,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245970161] [2021-06-05 13:57:35,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245970161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:35,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481694604] [2021-06-05 13:57:35,939 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 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 13:57:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:35,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:35,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:35,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481694604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:35,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:35,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 13:57:35,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526878421] [2021-06-05 13:57:35,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:57:35,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:35,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:57:35,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:57:35,989 INFO L87 Difference]: Start difference. First operand 323 states and 963 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:36,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:36,080 INFO L93 Difference]: Finished difference Result 414 states and 1084 transitions. [2021-06-05 13:57:36,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:57:36,081 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:57:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:36,082 INFO L225 Difference]: With dead ends: 414 [2021-06-05 13:57:36,082 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 13:57:36,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:57:36,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 13:57:36,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 323. [2021-06-05 13:57:36,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.987577639751553) internal successors, (962), 322 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:36,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 962 transitions. [2021-06-05 13:57:36,086 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 962 transitions. Word has length 17 [2021-06-05 13:57:36,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:36,086 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 962 transitions. [2021-06-05 13:57:36,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:36,086 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 962 transitions. [2021-06-05 13:57:36,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:57:36,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:36,087 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:36,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:36,300 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:36,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:36,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1179475432, now seen corresponding path program 50 times [2021-06-05 13:57:36,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:36,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800617701] [2021-06-05 13:57:36,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:36,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:36,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800617701] [2021-06-05 13:57:36,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800617701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:36,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863171121] [2021-06-05 13:57:36,344 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 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 13:57:36,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:36,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:36,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:36,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:36,446 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:36,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863171121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:36,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:36,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 13:57:36,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527454577] [2021-06-05 13:57:36,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:57:36,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:36,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:57:36,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:57:36,447 INFO L87 Difference]: Start difference. First operand 323 states and 962 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:36,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:36,511 INFO L93 Difference]: Finished difference Result 367 states and 1049 transitions. [2021-06-05 13:57:36,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:57:36,512 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:57:36,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:36,513 INFO L225 Difference]: With dead ends: 367 [2021-06-05 13:57:36,513 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 13:57:36,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:36,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 13:57:36,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 323. [2021-06-05 13:57:36,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.984472049689441) internal successors, (961), 322 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:36,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 961 transitions. [2021-06-05 13:57:36,517 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 961 transitions. Word has length 17 [2021-06-05 13:57:36,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:36,517 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 961 transitions. [2021-06-05 13:57:36,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:36,518 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 961 transitions. [2021-06-05 13:57:36,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:57:36,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:36,518 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:36,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:36,719 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:36,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:36,719 INFO L82 PathProgramCache]: Analyzing trace with hash -2021400276, now seen corresponding path program 51 times [2021-06-05 13:57:36,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:36,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835583723] [2021-06-05 13:57:36,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:36,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:36,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835583723] [2021-06-05 13:57:36,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835583723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:36,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378277518] [2021-06-05 13:57:36,762 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 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 13:57:36,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:57:36,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:36,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:57:36,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:36,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378277518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:36,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:36,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 13:57:36,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824412993] [2021-06-05 13:57:36,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:57:36,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:36,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:57:36,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:57:36,826 INFO L87 Difference]: Start difference. First operand 323 states and 961 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:36,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:36,898 INFO L93 Difference]: Finished difference Result 355 states and 1035 transitions. [2021-06-05 13:57:36,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:57:36,898 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:57:36,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:36,899 INFO L225 Difference]: With dead ends: 355 [2021-06-05 13:57:36,899 INFO L226 Difference]: Without dead ends: 351 [2021-06-05 13:57:36,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:36,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-05 13:57:36,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 323. [2021-06-05 13:57:36,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.981366459627329) internal successors, (960), 322 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:36,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 960 transitions. [2021-06-05 13:57:36,903 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 960 transitions. Word has length 17 [2021-06-05 13:57:36,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:36,903 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 960 transitions. [2021-06-05 13:57:36,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:36,904 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 960 transitions. [2021-06-05 13:57:36,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:57:36,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:36,904 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:37,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:37,117 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:37,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:37,117 INFO L82 PathProgramCache]: Analyzing trace with hash 339960316, now seen corresponding path program 52 times [2021-06-05 13:57:37,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:37,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020091009] [2021-06-05 13:57:37,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:37,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:37,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020091009] [2021-06-05 13:57:37,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020091009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:37,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193605860] [2021-06-05 13:57:37,155 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 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 13:57:37,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:37,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:37,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:57:37,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:37,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193605860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:37,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:37,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:57:37,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29954620] [2021-06-05 13:57:37,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:57:37,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:37,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:57:37,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:37,230 INFO L87 Difference]: Start difference. First operand 323 states and 960 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:37,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:37,265 INFO L93 Difference]: Finished difference Result 443 states and 1153 transitions. [2021-06-05 13:57:37,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:57:37,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17 [2021-06-05 13:57:37,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:37,267 INFO L225 Difference]: With dead ends: 443 [2021-06-05 13:57:37,267 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 13:57:37,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:37,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 13:57:37,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 330. [2021-06-05 13:57:37,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.0) internal successors, (987), 329 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:37,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 987 transitions. [2021-06-05 13:57:37,271 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 987 transitions. Word has length 17 [2021-06-05 13:57:37,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:37,271 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 987 transitions. [2021-06-05 13:57:37,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13:57:37,271 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 987 transitions. [2021-06-05 13:57:37,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:57:37,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:37,272 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:37,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 13:57:37,485 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:37,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:37,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2080052626, now seen corresponding path program 53 times [2021-06-05 13:57:37,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:37,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081978312] [2021-06-05 13:57:37,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:37,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:37,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081978312] [2021-06-05 13:57:37,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081978312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:37,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024873577] [2021-06-05 13:57:37,521 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:37,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:57:37,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:37,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:37,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:57:37,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024873577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:37,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:37,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-05 13:57:37,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734929303] [2021-06-05 13:57:37,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:57:37,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:37,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:57:37,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:37,581 INFO L87 Difference]: Start difference. First operand 330 states and 987 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:37,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:37,619 INFO L93 Difference]: Finished difference Result 430 states and 1125 transitions. [2021-06-05 13:57:37,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:57:37,619 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:57:37,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:37,620 INFO L225 Difference]: With dead ends: 430 [2021-06-05 13:57:37,621 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 13:57:37,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:57:37,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 13:57:37,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 329. [2021-06-05 13:57:37,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9908536585365852) internal successors, (981), 328 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 981 transitions. [2021-06-05 13:57:37,625 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 981 transitions. Word has length 17 [2021-06-05 13:57:37,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:37,625 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 981 transitions. [2021-06-05 13:57:37,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:37,625 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 981 transitions. [2021-06-05 13:57:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:57:37,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:37,625 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:37,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 13:57:37,841 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:37,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:37,841 INFO L82 PathProgramCache]: Analyzing trace with hash -504301362, now seen corresponding path program 54 times [2021-06-05 13:57:37,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:37,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468296280] [2021-06-05 13:57:37,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:37,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:37,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468296280] [2021-06-05 13:57:37,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468296280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:37,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96591046] [2021-06-05 13:57:37,893 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 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 13:57:37,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:57:37,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:37,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:37,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:37,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96591046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:37,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:37,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 13:57:37,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412699089] [2021-06-05 13:57:37,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:57:37,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:37,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:57:37,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:37,942 INFO L87 Difference]: Start difference. First operand 329 states and 981 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:38,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:38,033 INFO L93 Difference]: Finished difference Result 428 states and 1117 transitions. [2021-06-05 13:57:38,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:57:38,033 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:57:38,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:38,034 INFO L225 Difference]: With dead ends: 428 [2021-06-05 13:57:38,034 INFO L226 Difference]: Without dead ends: 426 [2021-06-05 13:57:38,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:38,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-05 13:57:38,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 329. [2021-06-05 13:57:38,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9847560975609757) internal successors, (979), 328 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 979 transitions. [2021-06-05 13:57:38,038 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 979 transitions. Word has length 17 [2021-06-05 13:57:38,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:38,038 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 979 transitions. [2021-06-05 13:57:38,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:38,038 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 979 transitions. [2021-06-05 13:57:38,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:57:38,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:38,039 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:38,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 13:57:38,245 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:38,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:38,245 INFO L82 PathProgramCache]: Analyzing trace with hash 985103634, now seen corresponding path program 55 times [2021-06-05 13:57:38,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:38,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609081837] [2021-06-05 13:57:38,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:38,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:38,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609081837] [2021-06-05 13:57:38,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609081837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:38,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926950358] [2021-06-05 13:57:38,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:57:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:38,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:38,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:38,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926950358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:38,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:38,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 13:57:38,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596308382] [2021-06-05 13:57:38,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:57:38,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:38,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:57:38,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:57:38,340 INFO L87 Difference]: Start difference. First operand 329 states and 979 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:38,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:38,427 INFO L93 Difference]: Finished difference Result 433 states and 1122 transitions. [2021-06-05 13:57:38,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:57:38,427 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:57:38,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:38,428 INFO L225 Difference]: With dead ends: 433 [2021-06-05 13:57:38,428 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 13:57:38,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:57:38,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 13:57:38,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 329. [2021-06-05 13:57:38,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:38,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-06-05 13:57:38,433 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 17 [2021-06-05 13:57:38,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:38,433 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-06-05 13:57:38,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:38,433 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-06-05 13:57:38,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:57:38,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:38,433 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:38,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 13:57:38,649 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:38,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:38,649 INFO L82 PathProgramCache]: Analyzing trace with hash -87981746, now seen corresponding path program 56 times [2021-06-05 13:57:38,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:38,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296437850] [2021-06-05 13:57:38,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:38,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:38,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:38,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296437850] [2021-06-05 13:57:38,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296437850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:38,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206988962] [2021-06-05 13:57:38,701 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 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 13:57:38,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:38,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:38,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:38,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:38,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206988962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:38,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:38,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 13:57:38,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610993271] [2021-06-05 13:57:38,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:57:38,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:38,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:57:38,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:57:38,764 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:38,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:38,832 INFO L93 Difference]: Finished difference Result 386 states and 1084 transitions. [2021-06-05 13:57:38,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:57:38,833 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:57:38,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:38,834 INFO L225 Difference]: With dead ends: 386 [2021-06-05 13:57:38,834 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 13:57:38,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:38,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 13:57:38,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 329. [2021-06-05 13:57:38,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9786585365853657) internal successors, (977), 328 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:38,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 977 transitions. [2021-06-05 13:57:38,838 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 977 transitions. Word has length 17 [2021-06-05 13:57:38,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:38,838 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 977 transitions. [2021-06-05 13:57:38,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:38,838 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 977 transitions. [2021-06-05 13:57:38,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:57:38,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:38,838 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:39,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:39,055 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:39,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:39,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1006109842, now seen corresponding path program 57 times [2021-06-05 13:57:39,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:39,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150658836] [2021-06-05 13:57:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:39,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:39,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150658836] [2021-06-05 13:57:39,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150658836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:39,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570619676] [2021-06-05 13:57:39,096 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 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 13:57:39,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:57:39,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:39,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:57:39,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:39,155 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:39,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570619676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:39,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:39,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 13:57:39,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116412510] [2021-06-05 13:57:39,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:57:39,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:39,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:57:39,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:57:39,156 INFO L87 Difference]: Start difference. First operand 329 states and 977 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:39,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:39,231 INFO L93 Difference]: Finished difference Result 385 states and 1081 transitions. [2021-06-05 13:57:39,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:57:39,231 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:57:39,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:39,232 INFO L225 Difference]: With dead ends: 385 [2021-06-05 13:57:39,232 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 13:57:39,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:39,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 13:57:39,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 329. [2021-06-05 13:57:39,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.975609756097561) internal successors, (976), 328 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:39,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 976 transitions. [2021-06-05 13:57:39,236 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 976 transitions. Word has length 17 [2021-06-05 13:57:39,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:39,236 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 976 transitions. [2021-06-05 13:57:39,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:39,236 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 976 transitions. [2021-06-05 13:57:39,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:57:39,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:39,237 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:39,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 13:57:39,437 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:39,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:39,437 INFO L82 PathProgramCache]: Analyzing trace with hash 563210702, now seen corresponding path program 58 times [2021-06-05 13:57:39,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:39,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972387771] [2021-06-05 13:57:39,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:39,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:39,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972387771] [2021-06-05 13:57:39,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972387771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:39,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997824729] [2021-06-05 13:57:39,480 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 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 13:57:39,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:39,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:39,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:39,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:39,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997824729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:39,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:39,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 13:57:39,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364201535] [2021-06-05 13:57:39,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:57:39,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:39,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:57:39,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:57:39,529 INFO L87 Difference]: Start difference. First operand 329 states and 976 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:39,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:39,596 INFO L93 Difference]: Finished difference Result 372 states and 1066 transitions. [2021-06-05 13:57:39,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:57:39,596 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:57:39,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:39,598 INFO L225 Difference]: With dead ends: 372 [2021-06-05 13:57:39,598 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 13:57:39,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:39,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 13:57:39,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 329. [2021-06-05 13:57:39,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.972560975609756) internal successors, (975), 328 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 975 transitions. [2021-06-05 13:57:39,608 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 975 transitions. Word has length 17 [2021-06-05 13:57:39,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:39,608 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 975 transitions. [2021-06-05 13:57:39,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:39,608 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 975 transitions. [2021-06-05 13:57:39,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:57:39,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:39,608 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:39,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:39,824 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:39,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:39,825 INFO L82 PathProgramCache]: Analyzing trace with hash -296506538, now seen corresponding path program 59 times [2021-06-05 13:57:39,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:39,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117001875] [2021-06-05 13:57:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:39,868 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:39,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:39,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117001875] [2021-06-05 13:57:39,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117001875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:39,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296678809] [2021-06-05 13:57:39,868 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 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 13:57:39,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:57:39,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:39,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:39,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:39,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296678809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:39,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:39,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2021-06-05 13:57:39,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077568819] [2021-06-05 13:57:39,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:39,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:39,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:39,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:39,928 INFO L87 Difference]: Start difference. First operand 329 states and 975 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:39,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:39,985 INFO L93 Difference]: Finished difference Result 518 states and 1389 transitions. [2021-06-05 13:57:39,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:57:39,989 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:57:39,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:39,990 INFO L225 Difference]: With dead ends: 518 [2021-06-05 13:57:39,990 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 13:57:39,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:39,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 13:57:39,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 384. [2021-06-05 13:57:39,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.0992167101827675) internal successors, (1187), 383 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:39,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1187 transitions. [2021-06-05 13:57:39,995 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1187 transitions. Word has length 17 [2021-06-05 13:57:39,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:39,995 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1187 transitions. [2021-06-05 13:57:39,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:39,995 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1187 transitions. [2021-06-05 13:57:39,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:57:39,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:39,996 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:40,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 13:57:40,207 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:40,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:40,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1140768216, now seen corresponding path program 60 times [2021-06-05 13:57:40,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:40,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631652961] [2021-06-05 13:57:40,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:40,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:40,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631652961] [2021-06-05 13:57:40,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631652961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:40,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726592100] [2021-06-05 13:57:40,258 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 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 13:57:40,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:57:40,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:40,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:57:40,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:40,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726592100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:40,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:40,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 13:57:40,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447925136] [2021-06-05 13:57:40,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:57:40,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:40,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:57:40,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:57:40,311 INFO L87 Difference]: Start difference. First operand 384 states and 1187 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 13:57:40,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:40,398 INFO L93 Difference]: Finished difference Result 496 states and 1356 transitions. [2021-06-05 13:57:40,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:57:40,398 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 17 [2021-06-05 13:57:40,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:40,399 INFO L225 Difference]: With dead ends: 496 [2021-06-05 13:57:40,399 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 13:57:40,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:40,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 13:57:40,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 384. [2021-06-05 13:57:40,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:40,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-06-05 13:57:40,404 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 17 [2021-06-05 13:57:40,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:40,404 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-06-05 13:57:40,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 13:57:40,404 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-06-05 13:57:40,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:57:40,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:40,405 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:40,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:40,609 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:40,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:40,609 INFO L82 PathProgramCache]: Analyzing trace with hash 348636780, now seen corresponding path program 61 times [2021-06-05 13:57:40,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:40,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964090086] [2021-06-05 13:57:40,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:40,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:40,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964090086] [2021-06-05 13:57:40,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964090086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:40,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642667363] [2021-06-05 13:57:40,652 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 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 13:57:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:40,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:40,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:40,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642667363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:40,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:40,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 13:57:40,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827445353] [2021-06-05 13:57:40,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:40,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:40,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:40,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:40,715 INFO L87 Difference]: Start difference. First operand 384 states and 1185 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:40,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:40,807 INFO L93 Difference]: Finished difference Result 501 states and 1361 transitions. [2021-06-05 13:57:40,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:57:40,807 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:57:40,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:40,809 INFO L225 Difference]: With dead ends: 501 [2021-06-05 13:57:40,809 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 13:57:40,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:57:40,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 13:57:40,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 390. [2021-06-05 13:57:40,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.102827763496144) internal successors, (1207), 389 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:40,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1207 transitions. [2021-06-05 13:57:40,813 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1207 transitions. Word has length 17 [2021-06-05 13:57:40,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:40,813 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1207 transitions. [2021-06-05 13:57:40,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:40,814 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1207 transitions. [2021-06-05 13:57:40,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:57:40,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:40,814 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:41,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:41,021 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:41,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:41,021 INFO L82 PathProgramCache]: Analyzing trace with hash -724448600, now seen corresponding path program 62 times [2021-06-05 13:57:41,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:41,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738677054] [2021-06-05 13:57:41,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:41,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:41,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738677054] [2021-06-05 13:57:41,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738677054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:41,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019315552] [2021-06-05 13:57:41,060 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:57:41,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:41,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:41,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:41,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:41,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019315552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:41,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:41,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 13:57:41,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840680202] [2021-06-05 13:57:41,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:41,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:41,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:41,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:41,119 INFO L87 Difference]: Start difference. First operand 390 states and 1207 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:41,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:41,214 INFO L93 Difference]: Finished difference Result 453 states and 1323 transitions. [2021-06-05 13:57:41,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:57:41,215 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:57:41,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:41,215 INFO L225 Difference]: With dead ends: 453 [2021-06-05 13:57:41,215 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 13:57:41,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:57:41,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 13:57:41,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 390. [2021-06-05 13:57:41,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.1002570694087406) internal successors, (1206), 389 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:41,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1206 transitions. [2021-06-05 13:57:41,220 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1206 transitions. Word has length 17 [2021-06-05 13:57:41,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:41,220 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1206 transitions. [2021-06-05 13:57:41,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:41,220 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1206 transitions. [2021-06-05 13:57:41,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:57:41,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:41,221 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:41,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:41,437 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:41,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:41,437 INFO L82 PathProgramCache]: Analyzing trace with hash 369642988, now seen corresponding path program 63 times [2021-06-05 13:57:41,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:41,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793609423] [2021-06-05 13:57:41,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:41,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:41,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793609423] [2021-06-05 13:57:41,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793609423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:41,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001129286] [2021-06-05 13:57:41,479 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 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 13:57:41,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:57:41,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:41,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:57:41,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:41,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001129286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:41,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:41,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 13:57:41,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431497046] [2021-06-05 13:57:41,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:41,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:41,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:41,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:41,538 INFO L87 Difference]: Start difference. First operand 390 states and 1206 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 13:57:41,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:41,623 INFO L93 Difference]: Finished difference Result 450 states and 1317 transitions. [2021-06-05 13:57:41,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:57:41,624 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 17 [2021-06-05 13:57:41,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:41,624 INFO L225 Difference]: With dead ends: 450 [2021-06-05 13:57:41,625 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 13:57:41,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:57:41,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 13:57:41,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 390. [2021-06-05 13:57:41,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0976863753213366) internal successors, (1205), 389 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:41,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1205 transitions. [2021-06-05 13:57:41,629 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1205 transitions. Word has length 17 [2021-06-05 13:57:41,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:41,629 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1205 transitions. [2021-06-05 13:57:41,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 13:57:41,629 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1205 transitions. [2021-06-05 13:57:41,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:57:41,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:41,630 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:41,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 13:57:41,830 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:41,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:41,830 INFO L82 PathProgramCache]: Analyzing trace with hash -73256152, now seen corresponding path program 64 times [2021-06-05 13:57:41,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:41,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654809522] [2021-06-05 13:57:41,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:41,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:41,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654809522] [2021-06-05 13:57:41,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654809522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:41,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827459444] [2021-06-05 13:57:41,876 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 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 13:57:41,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:41,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:41,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:41,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:41,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827459444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:41,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:41,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 13:57:41,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765298578] [2021-06-05 13:57:41,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:41,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:41,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:41,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:41,949 INFO L87 Difference]: Start difference. First operand 390 states and 1205 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:42,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:42,031 INFO L93 Difference]: Finished difference Result 444 states and 1310 transitions. [2021-06-05 13:57:42,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:57:42,031 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:57:42,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:42,032 INFO L225 Difference]: With dead ends: 444 [2021-06-05 13:57:42,032 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 13:57:42,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:57:42,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 13:57:42,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 390. [2021-06-05 13:57:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.095115681233933) internal successors, (1204), 389 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:42,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1204 transitions. [2021-06-05 13:57:42,036 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1204 transitions. Word has length 17 [2021-06-05 13:57:42,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:42,036 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1204 transitions. [2021-06-05 13:57:42,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:42,036 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1204 transitions. [2021-06-05 13:57:42,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:57:42,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:42,037 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:42,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 13:57:42,237 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:42,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:42,238 INFO L82 PathProgramCache]: Analyzing trace with hash -918227604, now seen corresponding path program 65 times [2021-06-05 13:57:42,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:42,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963346770] [2021-06-05 13:57:42,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:42,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:42,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963346770] [2021-06-05 13:57:42,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963346770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:42,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456619127] [2021-06-05 13:57:42,288 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 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 13:57:42,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:57:42,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:42,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:57:42,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:42,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456619127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:42,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:42,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 13:57:42,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45455502] [2021-06-05 13:57:42,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:42,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:42,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:42,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:42,349 INFO L87 Difference]: Start difference. First operand 390 states and 1204 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:42,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:42,433 INFO L93 Difference]: Finished difference Result 435 states and 1298 transitions. [2021-06-05 13:57:42,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:57:42,433 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:57:42,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:42,434 INFO L225 Difference]: With dead ends: 435 [2021-06-05 13:57:42,434 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 13:57:42,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:42,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 13:57:42,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 390. [2021-06-05 13:57:42,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0925449871465296) internal successors, (1203), 389 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:42,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1203 transitions. [2021-06-05 13:57:42,438 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1203 transitions. Word has length 17 [2021-06-05 13:57:42,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:42,438 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1203 transitions. [2021-06-05 13:57:42,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:42,438 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1203 transitions. [2021-06-05 13:57:42,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:57:42,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:42,439 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:42,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 13:57:42,640 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:42,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:42,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1606475449, now seen corresponding path program 66 times [2021-06-05 13:57:42,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:42,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352842381] [2021-06-05 13:57:42,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:57:42,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:42,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352842381] [2021-06-05 13:57:42,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352842381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:42,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857290430] [2021-06-05 13:57:42,727 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 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 13:57:42,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:57:42,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:42,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:57:42,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:57:42,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857290430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:42,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:42,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 13:57:42,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808275176] [2021-06-05 13:57:42,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:57:42,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:42,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:57:42,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:42,820 INFO L87 Difference]: Start difference. First operand 390 states and 1203 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:42,923 INFO L93 Difference]: Finished difference Result 721 states and 2125 transitions. [2021-06-05 13:57:42,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:57:42,923 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:57:42,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:42,924 INFO L225 Difference]: With dead ends: 721 [2021-06-05 13:57:42,924 INFO L226 Difference]: Without dead ends: 721 [2021-06-05 13:57:42,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:42,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-06-05 13:57:42,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 450. [2021-06-05 13:57:42,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.0423162583518932) internal successors, (1366), 449 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:42,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1366 transitions. [2021-06-05 13:57:42,930 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1366 transitions. Word has length 18 [2021-06-05 13:57:42,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:42,930 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1366 transitions. [2021-06-05 13:57:42,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:42,930 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1366 transitions. [2021-06-05 13:57:42,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:57:42,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:42,930 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:43,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 13:57:43,131 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:43,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:43,131 INFO L82 PathProgramCache]: Analyzing trace with hash 79861465, now seen corresponding path program 67 times [2021-06-05 13:57:43,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:43,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733710524] [2021-06-05 13:57:43,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:57:43,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:43,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733710524] [2021-06-05 13:57:43,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733710524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:43,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961138470] [2021-06-05 13:57:43,224 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 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 13:57:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:43,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:57:43,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:57:43,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961138470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:43,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:43,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 13:57:43,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133014233] [2021-06-05 13:57:43,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:57:43,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:43,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:57:43,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:43,347 INFO L87 Difference]: Start difference. First operand 450 states and 1366 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:43,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:43,450 INFO L93 Difference]: Finished difference Result 819 states and 2401 transitions. [2021-06-05 13:57:43,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:57:43,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:57:43,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:43,452 INFO L225 Difference]: With dead ends: 819 [2021-06-05 13:57:43,452 INFO L226 Difference]: Without dead ends: 819 [2021-06-05 13:57:43,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:43,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-06-05 13:57:43,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 531. [2021-06-05 13:57:43,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.0018867924528303) internal successors, (1591), 530 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:43,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1591 transitions. [2021-06-05 13:57:43,459 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1591 transitions. Word has length 19 [2021-06-05 13:57:43,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:43,459 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1591 transitions. [2021-06-05 13:57:43,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1591 transitions. [2021-06-05 13:57:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:43,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:43,460 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:43,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-05 13:57:43,660 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:43,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:43,660 INFO L82 PathProgramCache]: Analyzing trace with hash 816698247, now seen corresponding path program 68 times [2021-06-05 13:57:43,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:43,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655553791] [2021-06-05 13:57:43,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:57:43,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:43,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655553791] [2021-06-05 13:57:43,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655553791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:43,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680256128] [2021-06-05 13:57:43,760 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 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 13:57:43,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:43,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:43,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:57:43,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:57:43,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680256128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:43,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:43,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 13:57:43,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24418890] [2021-06-05 13:57:43,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:57:43,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:43,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:57:43,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:57:43,890 INFO L87 Difference]: Start difference. First operand 531 states and 1591 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:44,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:44,054 INFO L93 Difference]: Finished difference Result 928 states and 2706 transitions. [2021-06-05 13:57:44,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:57:44,055 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:44,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:44,056 INFO L225 Difference]: With dead ends: 928 [2021-06-05 13:57:44,056 INFO L226 Difference]: Without dead ends: 927 [2021-06-05 13:57:44,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:57:44,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-06-05 13:57:44,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 625. [2021-06-05 13:57:44,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.9791666666666665) internal successors, (1859), 624 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:44,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1859 transitions. [2021-06-05 13:57:44,077 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1859 transitions. Word has length 20 [2021-06-05 13:57:44,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:44,077 INFO L482 AbstractCegarLoop]: Abstraction has 625 states and 1859 transitions. [2021-06-05 13:57:44,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:44,077 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1859 transitions. [2021-06-05 13:57:44,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:57:44,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:44,078 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:44,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:44,278 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:44,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:44,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2111165287, now seen corresponding path program 69 times [2021-06-05 13:57:44,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:44,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21147987] [2021-06-05 13:57:44,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:44,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:44,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21147987] [2021-06-05 13:57:44,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21147987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:44,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257183135] [2021-06-05 13:57:44,348 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 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 13:57:44,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:57:44,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:44,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 13:57:44,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:44,746 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 13:57:44,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:44,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 13:57:46,017 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 276 [2021-06-05 13:57:46,240 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 373 [2021-06-05 13:57:46,516 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 405 [2021-06-05 13:57:47,594 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 238 [2021-06-05 13:57:47,787 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 320 [2021-06-05 13:57:48,330 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 549 [2021-06-05 13:57:48,850 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 549 [2021-06-05 13:57:49,449 WARN L205 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 564 [2021-06-05 13:57:50,413 WARN L205 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 640 [2021-06-05 13:57:50,896 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 490 [2021-06-05 13:57:51,551 WARN L205 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 448 [2021-06-05 13:57:51,721 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 285 [2021-06-05 13:57:51,909 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 281 [2021-06-05 13:57:52,054 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 236 [2021-06-05 13:57:52,959 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 278 [2021-06-05 13:57:53,169 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 284 [2021-06-05 13:57:53,401 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 334 [2021-06-05 13:57:54,193 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 272 [2021-06-05 13:57:54,611 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 493 [2021-06-05 13:57:55,174 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 661 DAG size of output: 526 [2021-06-05 13:57:55,395 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 267 [2021-06-05 13:57:55,552 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 280 [2021-06-05 13:57:55,738 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 226 [2021-06-05 13:57:56,474 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 227 [2021-06-05 13:57:56,649 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 280 [2021-06-05 13:57:57,943 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 302 [2021-06-05 13:57:58,383 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 455 [2021-06-05 13:57:59,008 WARN L205 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 608 DAG size of output: 539 [2021-06-05 13:58:00,277 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 1029 DAG size of output: 839 [2021-06-05 13:58:00,415 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 247 [2021-06-05 13:58:00,541 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 248 [2021-06-05 13:58:01,782 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 277 [2021-06-05 13:58:01,942 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 286 [2021-06-05 13:58:02,238 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 404 [2021-06-05 13:58:03,045 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 242 [2021-06-05 13:58:04,172 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 285 [2021-06-05 13:58:04,416 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 331 [2021-06-05 13:58:04,874 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 435 [2021-06-05 13:58:05,645 WARN L205 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 776 DAG size of output: 642 [2021-06-05 13:58:06,597 WARN L205 SmtUtils]: Spent 947.00 ms on a formula simplification. DAG size of input: 842 DAG size of output: 701 [2021-06-05 13:58:08,736 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 1449 DAG size of output: 1159 [2021-06-05 13:58:08,849 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 276 [2021-06-05 13:58:09,059 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 282 [2021-06-05 13:58:09,218 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 237 [2021-06-05 13:58:10,670 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 336 [2021-06-05 13:58:10,900 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 386 [2021-06-05 13:58:11,252 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 432 [2021-06-05 13:58:11,698 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 457 [2021-06-05 13:58:12,218 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 493 [2021-06-05 13:58:12,412 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 245 [2021-06-05 13:58:13,934 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 282 [2021-06-05 13:58:14,143 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 290 [2021-06-05 13:58:14,458 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 384 [2021-06-05 13:58:14,913 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 459 [2021-06-05 13:58:15,474 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 565 DAG size of output: 485 [2021-06-05 13:58:16,646 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 963 DAG size of output: 759 [2021-06-05 13:58:17,909 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 235 [2021-06-05 13:58:18,046 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 267 [2021-06-05 13:58:18,276 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 342 [2021-06-05 13:58:18,542 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 364 [2021-06-05 13:58:19,200 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 256 [2021-06-05 13:58:19,556 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 309 [2021-06-05 13:58:20,238 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 247 [2021-06-05 13:58:20,391 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 289 [2021-06-05 13:58:20,805 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 460 [2021-06-05 13:58:21,211 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 471 [2021-06-05 13:58:21,709 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 593 DAG size of output: 517 [2021-06-05 13:58:22,660 WARN L205 SmtUtils]: Spent 947.00 ms on a formula simplification. DAG size of input: 881 DAG size of output: 770 [2021-06-05 13:58:23,950 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 976 DAG size of output: 843 [2021-06-05 13:58:26,179 WARN L205 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 1672 DAG size of output: 1269 [2021-06-05 13:58:30,806 WARN L205 SmtUtils]: Spent 4.62 s on a formula simplification. DAG size of input: 2766 DAG size of output: 2078 [2021-06-05 13:58:36,216 WARN L205 SmtUtils]: Spent 5.40 s on a formula simplification. DAG size of input: 2914 DAG size of output: 2167 [2021-06-05 13:58:42,492 WARN L205 SmtUtils]: Spent 6.26 s on a formula simplification. DAG size of input: 3096 DAG size of output: 2337 [2021-06-05 13:58:49,923 WARN L205 SmtUtils]: Spent 7.42 s on a formula simplification. DAG size of input: 3384 DAG size of output: 2564 [2021-06-05 13:58:57,277 WARN L205 SmtUtils]: Spent 7.34 s on a formula simplification. DAG size of input: 3384 DAG size of output: 2564 [2021-06-05 13:59:05,450 WARN L205 SmtUtils]: Spent 8.16 s on a formula simplification. DAG size of input: 3395 DAG size of output: 2575 [2021-06-05 13:59:05,739 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 2571 [2021-06-05 13:59:13,009 WARN L205 SmtUtils]: Spent 7.25 s on a formula simplification. DAG size of input: 2573 DAG size of output: 2793 [2021-06-05 13:59:16,868 WARN L205 SmtUtils]: Spent 3.85 s on a formula simplification. DAG size of input: 1761 DAG size of output: 2006 [2021-06-05 13:59:20,299 WARN L205 SmtUtils]: Spent 3.42 s on a formula simplification. DAG size of input: 1624 DAG size of output: 1786 [2021-06-05 13:59:20,408 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 1251 [2021-06-05 13:59:20,685 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1071 DAG size of output: 1071 [2021-06-05 13:59:21,411 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 266 [2021-06-05 13:59:21,957 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 228 [2021-06-05 13:59:22,790 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 750 DAG size of output: 510 [2021-06-05 13:59:23,452 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 1180 DAG size of output: 813 [2021-06-05 13:59:24,306 WARN L205 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 1214 DAG size of output: 842 [2021-06-05 13:59:25,309 WARN L205 SmtUtils]: Spent 969.00 ms on a formula simplification. DAG size of input: 1258 DAG size of output: 879 [2021-06-05 13:59:26,630 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 1418 DAG size of output: 990 [2021-06-05 13:59:27,378 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 683 DAG size of output: 683 [2021-06-05 13:59:27,975 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 240 [2021-06-05 13:59:29,437 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 365 [2021-06-05 13:59:29,799 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 814 DAG size of output: 480 [2021-06-05 13:59:30,300 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 840 DAG size of output: 500 [2021-06-05 13:59:30,845 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 937 DAG size of output: 538 [2021-06-05 13:59:31,418 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 1090 DAG size of output: 589 [2021-06-05 13:59:33,054 WARN L205 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 2240 DAG size of output: 1268 [2021-06-05 13:59:34,798 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 914 DAG size of output: 944 [2021-06-05 13:59:35,577 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 487 [2021-06-05 13:59:36,645 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 252 [2021-06-05 13:59:36,816 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 261 [2021-06-05 13:59:37,110 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 290 [2021-06-05 13:59:38,026 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 251 [2021-06-05 13:59:38,222 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 266 [2021-06-05 13:59:38,486 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 300 [2021-06-05 13:59:38,944 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 704 DAG size of output: 419 [2021-06-05 13:59:39,427 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 756 DAG size of output: 464 [2021-06-05 13:59:39,532 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 635 DAG size of output: 635 [2021-06-05 13:59:40,076 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 316 [2021-06-05 13:59:40,612 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 218 [2021-06-05 13:59:41,004 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 277 [2021-06-05 13:59:42,028 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 684 DAG size of output: 452 [2021-06-05 13:59:42,418 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 464 [2021-06-05 13:59:42,897 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 725 DAG size of output: 492 [2021-06-05 13:59:43,403 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 529 [2021-06-05 13:59:44,220 WARN L205 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 1332 DAG size of output: 697 [2021-06-05 13:59:46,817 WARN L205 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 3118 DAG size of output: 1567 [2021-06-05 13:59:49,673 WARN L205 SmtUtils]: Spent 2.84 s on a formula simplification. DAG size of input: 1218 DAG size of output: 1431 [2021-06-05 13:59:49,873 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 1087 DAG size of output: 1087 [2021-06-05 13:59:50,227 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 964 DAG size of output: 964 [2021-06-05 13:59:51,469 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 896 DAG size of output: 992 [2021-06-05 13:59:52,020 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 688 DAG size of output: 624 [2021-06-05 13:59:52,529 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 273 [2021-06-05 13:59:52,766 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 322 [2021-06-05 13:59:53,322 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 254 [2021-06-05 13:59:53,492 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 282 [2021-06-05 13:59:53,943 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 457 [2021-06-05 13:59:54,657 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 243 [2021-06-05 13:59:54,914 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 285 [2021-06-05 13:59:55,545 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 1004 DAG size of output: 531 [2021-06-05 13:59:56,486 WARN L205 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 1110 DAG size of output: 573 [2021-06-05 13:59:57,360 WARN L205 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 1254 DAG size of output: 662 [2021-06-05 13:59:58,464 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 656 DAG size of output: 696 [2021-06-05 13:59:58,798 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 231 [2021-06-05 13:59:59,315 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 186 [2021-06-05 13:59:59,927 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 216 [2021-06-05 14:00:00,124 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 230 [2021-06-05 14:00:00,424 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 257 [2021-06-05 14:00:00,689 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 276 [2021-06-05 14:00:01,000 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 360 [2021-06-05 14:00:01,230 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 306 [2021-06-05 14:00:02,204 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 181 [2021-06-05 14:00:02,556 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 378 [2021-06-05 14:00:03,875 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 191 [2021-06-05 14:00:04,117 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 205 [2021-06-05 14:00:04,551 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 860 DAG size of output: 304 [2021-06-05 14:00:06,196 WARN L205 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 1932 DAG size of output: 829 [2021-06-05 14:00:10,974 WARN L205 SmtUtils]: Spent 4.76 s on a formula simplification. DAG size of input: 4820 DAG size of output: 2203 [2021-06-05 14:00:15,614 WARN L205 SmtUtils]: Spent 4.60 s on a formula simplification. DAG size of input: 4820 DAG size of output: 2203 [2021-06-05 14:00:22,193 WARN L205 SmtUtils]: Spent 6.55 s on a formula simplification. DAG size of input: 4827 DAG size of output: 2446 [2021-06-05 14:00:22,740 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 1002 DAG size of output: 701 [2021-06-05 14:00:23,568 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 782 DAG size of output: 366 [2021-06-05 14:00:25,841 WARN L205 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 1696 DAG size of output: 1306 [2021-06-05 14:00:26,353 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 1066 DAG size of output: 847 [2021-06-05 14:00:27,308 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 437 [2021-06-05 14:00:27,559 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 328 [2021-06-05 14:00:28,331 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 1153 DAG size of output: 527 [2021-06-05 14:00:29,260 WARN L205 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 1785 DAG size of output: 773 [2021-06-05 14:00:30,225 WARN L205 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 1785 DAG size of output: 773 [2021-06-05 14:00:31,321 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 1790 DAG size of output: 775 [2021-06-05 14:00:31,994 WARN L205 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 780 [2021-06-05 14:00:32,108 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 634 [2021-06-05 14:00:33,343 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 281 [2021-06-05 14:00:33,560 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 324 [2021-06-05 14:00:33,735 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 324 [2021-06-05 14:00:33,956 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 249 [2021-06-05 14:00:34,091 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 212 [2021-06-05 14:00:34,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:34,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:34,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:34,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 14:00:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:34,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257183135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:34,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:34,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 14:00:34,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959991682] [2021-06-05 14:00:34,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:00:34,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:34,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:00:34,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:00:34,499 INFO L87 Difference]: Start difference. First operand 625 states and 1859 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 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 14:00:34,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:34,881 INFO L93 Difference]: Finished difference Result 848 states and 2360 transitions. [2021-06-05 14:00:34,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:00:34,882 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 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 21 [2021-06-05 14:00:34,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:34,883 INFO L225 Difference]: With dead ends: 848 [2021-06-05 14:00:34,883 INFO L226 Difference]: Without dead ends: 845 [2021-06-05 14:00:34,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 212.1ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:00:34,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-06-05 14:00:34,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 721. [2021-06-05 14:00:34,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.0319444444444446) internal successors, (2183), 720 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:34,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2183 transitions. [2021-06-05 14:00:34,892 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2183 transitions. Word has length 21 [2021-06-05 14:00:34,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:34,892 INFO L482 AbstractCegarLoop]: Abstraction has 721 states and 2183 transitions. [2021-06-05 14:00:34,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 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 14:00:34,892 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2183 transitions. [2021-06-05 14:00:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:00:34,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:34,893 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:35,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 14:00:35,117 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:35,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:35,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1684323737, now seen corresponding path program 70 times [2021-06-05 14:00:35,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:35,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347233126] [2021-06-05 14:00:35,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:35,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:35,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347233126] [2021-06-05 14:00:35,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347233126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:35,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997095178] [2021-06-05 14:00:35,203 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 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 14:00:35,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:35,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:35,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:35,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:35,714 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 14:00:35,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:35,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 14:00:36,961 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 448 [2021-06-05 14:00:37,183 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 550 DAG size of output: 454 [2021-06-05 14:00:37,924 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 248 [2021-06-05 14:00:38,344 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 802 DAG size of output: 610 [2021-06-05 14:00:38,861 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 825 DAG size of output: 622 [2021-06-05 14:00:39,463 WARN L205 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 645 [2021-06-05 14:00:40,058 WARN L205 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 645 [2021-06-05 14:00:40,697 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 858 DAG size of output: 656 [2021-06-05 14:00:41,453 WARN L205 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 658 DAG size of output: 764 [2021-06-05 14:00:41,990 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 646 [2021-06-05 14:00:42,492 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 643 DAG size of output: 656 [2021-06-05 14:00:42,703 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 404 [2021-06-05 14:00:43,772 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 255 [2021-06-05 14:00:44,306 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 344 [2021-06-05 14:00:44,544 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 379 [2021-06-05 14:00:44,849 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 639 DAG size of output: 396 [2021-06-05 14:00:45,304 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 806 DAG size of output: 485 [2021-06-05 14:00:45,710 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 806 DAG size of output: 485 [2021-06-05 14:00:46,316 WARN L205 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 812 DAG size of output: 491 [2021-06-05 14:00:46,845 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 525 [2021-06-05 14:00:47,214 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 405 [2021-06-05 14:00:47,334 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 238 [2021-06-05 14:00:47,842 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 356 [2021-06-05 14:00:48,231 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 310 [2021-06-05 14:00:48,859 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 236 [2021-06-05 14:00:49,053 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 302 [2021-06-05 14:00:49,322 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 401 [2021-06-05 14:00:49,498 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 316 [2021-06-05 14:00:49,900 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 214 [2021-06-05 14:00:50,344 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 275 [2021-06-05 14:00:50,915 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 267 [2021-06-05 14:00:51,301 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 471 [2021-06-05 14:00:51,664 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 471 [2021-06-05 14:00:52,089 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 706 DAG size of output: 474 [2021-06-05 14:00:52,471 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 527 [2021-06-05 14:00:52,995 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 160 [2021-06-05 14:00:53,843 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 283 [2021-06-05 14:00:54,072 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 314 [2021-06-05 14:00:54,278 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 314 [2021-06-05 14:00:54,509 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 320 [2021-06-05 14:00:54,749 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 367 [2021-06-05 14:00:55,201 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 308 [2021-06-05 14:00:55,749 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 221 [2021-06-05 14:00:55,897 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 274 [2021-06-05 14:00:56,064 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 274 [2021-06-05 14:00:56,228 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 276 [2021-06-05 14:00:56,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:56,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:56,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:56,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 14:00:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:56,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997095178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:56,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:56,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 14:00:56,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330777450] [2021-06-05 14:00:56,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:00:56,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:56,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:00:56,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:00:56,522 INFO L87 Difference]: Start difference. First operand 721 states and 2183 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:56,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:56,793 INFO L93 Difference]: Finished difference Result 961 states and 2736 transitions. [2021-06-05 14:00:56,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:00:56,794 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:00:56,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:56,796 INFO L225 Difference]: With dead ends: 961 [2021-06-05 14:00:56,796 INFO L226 Difference]: Without dead ends: 958 [2021-06-05 14:00:56,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 251.3ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:00:56,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-06-05 14:00:56,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 809. [2021-06-05 14:00:56,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.1014851485148514) internal successors, (2506), 808 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:56,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2506 transitions. [2021-06-05 14:00:56,807 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2506 transitions. Word has length 21 [2021-06-05 14:00:56,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:56,808 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2506 transitions. [2021-06-05 14:00:56,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:56,808 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2506 transitions. [2021-06-05 14:00:56,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:00:56,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:56,809 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:57,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5383 [2021-06-05 14:00:57,027 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:57,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:57,027 INFO L82 PathProgramCache]: Analyzing trace with hash 161319513, now seen corresponding path program 71 times [2021-06-05 14:00:57,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:57,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013813839] [2021-06-05 14:00:57,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:57,102 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:57,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:57,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013813839] [2021-06-05 14:00:57,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013813839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:57,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648709658] [2021-06-05 14:00:57,102 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 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 14:00:57,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:00:57,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:57,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:57,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:57,534 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 14:00:57,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:57,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 14:00:58,245 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 247 [2021-06-05 14:00:58,381 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 267 [2021-06-05 14:00:58,569 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 281 [2021-06-05 14:00:59,245 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 241 [2021-06-05 14:00:59,379 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 256 [2021-06-05 14:00:59,726 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 405 [2021-06-05 14:01:00,061 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 405 [2021-06-05 14:01:00,464 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 420 [2021-06-05 14:01:01,013 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 522 [2021-06-05 14:01:01,223 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 274 [2021-06-05 14:01:01,379 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 312 [2021-06-05 14:01:01,487 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 237 [2021-06-05 14:01:02,144 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 260 [2021-06-05 14:01:03,404 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 268 [2021-06-05 14:01:03,724 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 420 [2021-06-05 14:01:04,090 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 416 [2021-06-05 14:01:04,811 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 202 [2021-06-05 14:01:05,230 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 654 DAG size of output: 452 [2021-06-05 14:01:05,777 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 712 DAG size of output: 504 [2021-06-05 14:01:06,021 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 318 [2021-06-05 14:01:07,092 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 251 [2021-06-05 14:01:07,277 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 286 [2021-06-05 14:01:08,212 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 315 [2021-06-05 14:01:09,020 WARN L205 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 1072 DAG size of output: 665 [2021-06-05 14:01:09,865 WARN L205 SmtUtils]: Spent 840.00 ms on a formula simplification. DAG size of input: 1072 DAG size of output: 665 [2021-06-05 14:01:11,091 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 1080 DAG size of output: 713 [2021-06-05 14:01:11,662 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 636 [2021-06-05 14:01:12,130 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 563 [2021-06-05 14:01:12,284 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 282 [2021-06-05 14:01:12,413 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 271 [2021-06-05 14:01:12,878 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 257 [2021-06-05 14:01:13,090 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 334 [2021-06-05 14:01:13,679 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 480 DAG size of output: 325 [2021-06-05 14:01:13,847 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 274 [2021-06-05 14:01:13,998 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 271 [2021-06-05 14:01:14,970 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 357 [2021-06-05 14:01:15,216 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 357 [2021-06-05 14:01:15,521 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 606 DAG size of output: 365 [2021-06-05 14:01:15,874 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 284 [2021-06-05 14:01:16,008 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 218 [2021-06-05 14:01:16,592 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 245 [2021-06-05 14:01:16,742 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 245 [2021-06-05 14:01:16,873 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 250 [2021-06-05 14:01:17,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:17,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:17,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:17,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 14:01:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:17,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648709658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:17,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:17,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 14:01:17,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211032033] [2021-06-05 14:01:17,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:01:17,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:17,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:01:17,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:17,490 INFO L87 Difference]: Start difference. First operand 809 states and 2506 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:17,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:17,747 INFO L93 Difference]: Finished difference Result 1077 states and 3152 transitions. [2021-06-05 14:01:17,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:01:17,747 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:01:17,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:17,749 INFO L225 Difference]: With dead ends: 1077 [2021-06-05 14:01:17,749 INFO L226 Difference]: Without dead ends: 1074 [2021-06-05 14:01:17,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:17,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-06-05 14:01:17,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 915. [2021-06-05 14:01:17,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 3.1783369803063457) internal successors, (2905), 914 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:17,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2905 transitions. [2021-06-05 14:01:17,766 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2905 transitions. Word has length 21 [2021-06-05 14:01:17,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:17,767 INFO L482 AbstractCegarLoop]: Abstraction has 915 states and 2905 transitions. [2021-06-05 14:01:17,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2905 transitions. [2021-06-05 14:01:17,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:01:17,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:17,769 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:17,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6461 [2021-06-05 14:01:17,977 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:17,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:17,977 INFO L82 PathProgramCache]: Analyzing trace with hash 192828825, now seen corresponding path program 72 times [2021-06-05 14:01:17,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:17,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419706909] [2021-06-05 14:01:17,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:18,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:18,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419706909] [2021-06-05 14:01:18,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419706909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:18,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924549393] [2021-06-05 14:01:18,058 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 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 14:01:18,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:01:18,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:18,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:01:18,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:18,575 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 14:01:18,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:18,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 14:01:19,559 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 473 DAG size of output: 410 [2021-06-05 14:01:20,354 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 705 DAG size of output: 571 [2021-06-05 14:01:21,162 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 319 [2021-06-05 14:01:21,336 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 388 [2021-06-05 14:01:21,925 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 1080 DAG size of output: 847 [2021-06-05 14:01:22,631 WARN L205 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 1097 DAG size of output: 862 [2021-06-05 14:01:23,447 WARN L205 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 870 [2021-06-05 14:01:24,320 WARN L205 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 870 [2021-06-05 14:01:25,346 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 1136 DAG size of output: 887 [2021-06-05 14:01:26,137 WARN L205 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 883 DAG size of output: 931 [2021-06-05 14:01:26,547 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 876 DAG size of output: 419 [2021-06-05 14:01:27,143 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 498 [2021-06-05 14:01:28,286 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 264 [2021-06-05 14:01:28,557 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 439 [2021-06-05 14:01:28,970 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 705 DAG size of output: 525 [2021-06-05 14:01:29,473 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 778 DAG size of output: 597 [2021-06-05 14:01:29,988 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 778 DAG size of output: 597 [2021-06-05 14:01:30,645 WARN L205 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 788 DAG size of output: 633 [2021-06-05 14:01:31,089 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 599 DAG size of output: 599 [2021-06-05 14:01:31,377 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 529 [2021-06-05 14:01:31,834 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 311 [2021-06-05 14:01:32,358 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 300 [2021-06-05 14:01:32,524 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 589 DAG size of output: 325 [2021-06-05 14:01:32,760 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 375 [2021-06-05 14:01:32,979 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 375 [2021-06-05 14:01:33,221 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 381 [2021-06-05 14:01:33,410 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 298 [2021-06-05 14:01:34,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:34,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:34,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:34,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 14:01:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:34,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924549393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:34,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:34,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 14:01:34,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454963143] [2021-06-05 14:01:34,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:01:34,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:34,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:01:34,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:34,577 INFO L87 Difference]: Start difference. First operand 915 states and 2905 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:34,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:34,862 INFO L93 Difference]: Finished difference Result 1209 states and 3643 transitions. [2021-06-05 14:01:34,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:01:34,863 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:01:34,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:34,865 INFO L225 Difference]: With dead ends: 1209 [2021-06-05 14:01:34,865 INFO L226 Difference]: Without dead ends: 1206 [2021-06-05 14:01:34,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:34,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-06-05 14:01:34,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1042. [2021-06-05 14:01:34,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 3.2526416906820366) internal successors, (3386), 1041 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:34,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 3386 transitions. [2021-06-05 14:01:34,879 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 3386 transitions. Word has length 21 [2021-06-05 14:01:34,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:34,879 INFO L482 AbstractCegarLoop]: Abstraction has 1042 states and 3386 transitions. [2021-06-05 14:01:34,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:34,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 3386 transitions. [2021-06-05 14:01:34,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:01:34,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:34,881 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:35,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7256 [2021-06-05 14:01:35,082 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:35,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:35,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1169617497, now seen corresponding path program 73 times [2021-06-05 14:01:35,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:35,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335983803] [2021-06-05 14:01:35,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:35,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:35,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335983803] [2021-06-05 14:01:35,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335983803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:35,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088682294] [2021-06-05 14:01:35,145 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 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 14:01:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:35,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:01:35,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:35,617 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 14:01:35,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:35,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 14:01:36,560 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 279 [2021-06-05 14:01:36,762 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 354 [2021-06-05 14:01:36,997 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 375 [2021-06-05 14:01:37,275 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 395 [2021-06-05 14:01:37,636 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 406 [2021-06-05 14:01:37,969 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 406 [2021-06-05 14:01:38,347 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 421 [2021-06-05 14:01:38,802 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 448 [2021-06-05 14:01:38,974 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 282 [2021-06-05 14:01:39,759 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 264 [2021-06-05 14:01:39,950 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 282 [2021-06-05 14:01:40,087 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 261 [2021-06-05 14:01:42,380 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 234 [2021-06-05 14:01:42,662 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 325 [2021-06-05 14:01:43,056 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 881 DAG size of output: 445 [2021-06-05 14:01:43,462 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 881 DAG size of output: 445 [2021-06-05 14:01:44,312 WARN L205 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 602 [2021-06-05 14:01:44,567 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 384 [2021-06-05 14:01:44,825 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 277 [2021-06-05 14:01:45,102 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 281 [2021-06-05 14:01:45,547 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 472 [2021-06-05 14:01:45,821 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 274 [2021-06-05 14:01:46,297 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 291 [2021-06-05 14:01:46,771 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 404 [2021-06-05 14:01:47,283 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 404 [2021-06-05 14:01:47,791 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 412 [2021-06-05 14:01:48,314 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 405 [2021-06-05 14:01:48,784 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 366 [2021-06-05 14:01:49,222 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 463 [2021-06-05 14:01:50,105 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 394 [2021-06-05 14:01:50,208 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 219 [2021-06-05 14:01:50,693 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 263 [2021-06-05 14:01:50,857 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 326 [2021-06-05 14:01:51,200 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 369 [2021-06-05 14:01:51,500 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 379 [2021-06-05 14:01:51,760 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 379 [2021-06-05 14:01:52,052 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 720 DAG size of output: 383 [2021-06-05 14:01:52,345 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 409 [2021-06-05 14:01:52,534 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 258 [2021-06-05 14:01:52,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:52,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:52,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:52,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 14:01:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:52,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088682294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:52,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:52,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 14:01:52,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415702556] [2021-06-05 14:01:52,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:01:52,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:52,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:01:52,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:52,859 INFO L87 Difference]: Start difference. First operand 1042 states and 3386 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:53,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:53,123 INFO L93 Difference]: Finished difference Result 1356 states and 4198 transitions. [2021-06-05 14:01:53,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:01:53,123 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:01:53,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:53,138 INFO L225 Difference]: With dead ends: 1356 [2021-06-05 14:01:53,139 INFO L226 Difference]: Without dead ends: 1353 [2021-06-05 14:01:53,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:53,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-06-05 14:01:53,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1190. [2021-06-05 14:01:53,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.3187552565180822) internal successors, (3946), 1189 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3946 transitions. [2021-06-05 14:01:53,169 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3946 transitions. Word has length 21 [2021-06-05 14:01:53,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:53,169 INFO L482 AbstractCegarLoop]: Abstraction has 1190 states and 3946 transitions. [2021-06-05 14:01:53,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3946 transitions. [2021-06-05 14:01:53,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:01:53,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:53,171 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:53,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8393 [2021-06-05 14:01:53,389 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:53,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:53,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1385295257, now seen corresponding path program 74 times [2021-06-05 14:01:53,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:53,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912596877] [2021-06-05 14:01:53,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:01:53,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:53,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912596877] [2021-06-05 14:01:53,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912596877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:53,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235985423] [2021-06-05 14:01:53,505 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 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 14:01:53,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:01:53,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:53,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:01:53,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:54,016 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 14:01:54,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:54,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 14:01:54,643 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 291 [2021-06-05 14:01:54,780 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 312 [2021-06-05 14:01:54,946 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 318 [2021-06-05 14:01:55,578 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 285 [2021-06-05 14:01:55,715 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 292 [2021-06-05 14:01:56,044 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 489 [2021-06-05 14:01:56,399 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 489 [2021-06-05 14:01:56,793 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 551 DAG size of output: 505 [2021-06-05 14:01:57,465 WARN L205 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 616 [2021-06-05 14:01:57,768 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 288 [2021-06-05 14:01:58,206 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 328 [2021-06-05 14:01:58,435 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 349 [2021-06-05 14:01:58,597 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 276 [2021-06-05 14:01:59,487 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 302 [2021-06-05 14:01:59,605 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 240 [2021-06-05 14:02:00,380 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 293 [2021-06-05 14:02:00,586 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 360 [2021-06-05 14:02:00,970 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 789 DAG size of output: 478 [2021-06-05 14:02:01,129 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 293 [2021-06-05 14:02:01,237 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 225 [2021-06-05 14:02:01,885 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 280 [2021-06-05 14:02:02,060 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 469 DAG size of output: 334 [2021-06-05 14:02:02,210 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 243 [2021-06-05 14:02:02,945 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 280 [2021-06-05 14:02:03,263 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 714 DAG size of output: 442 [2021-06-05 14:02:03,999 WARN L205 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 1161 DAG size of output: 684 [2021-06-05 14:02:04,919 WARN L205 SmtUtils]: Spent 914.00 ms on a formula simplification. DAG size of input: 1270 DAG size of output: 761 [2021-06-05 14:02:05,220 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 306 [2021-06-05 14:02:05,754 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 392 [2021-06-05 14:02:06,116 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 388 [2021-06-05 14:02:06,357 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 322 [2021-06-05 14:02:06,511 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 287 [2021-06-05 14:02:07,286 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 302 [2021-06-05 14:02:07,443 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 316 [2021-06-05 14:02:07,640 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 327 [2021-06-05 14:02:07,885 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 364 [2021-06-05 14:02:08,198 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 433 [2021-06-05 14:02:08,397 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 286 [2021-06-05 14:02:09,325 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 314 [2021-06-05 14:02:09,480 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 388 [2021-06-05 14:02:09,749 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 413 [2021-06-05 14:02:10,042 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 488 [2021-06-05 14:02:10,385 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 480 [2021-06-05 14:02:10,847 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 706 DAG size of output: 550 [2021-06-05 14:02:11,637 WARN L205 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 1142 DAG size of output: 736 [2021-06-05 14:02:11,888 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 340 [2021-06-05 14:02:12,000 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 263 [2021-06-05 14:02:12,771 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 259 [2021-06-05 14:02:12,900 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 307 [2021-06-05 14:02:13,062 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 473 DAG size of output: 370 [2021-06-05 14:02:13,315 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 432 [2021-06-05 14:02:13,645 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 428 [2021-06-05 14:02:13,777 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 261 [2021-06-05 14:02:14,621 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 328 [2021-06-05 14:02:14,762 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 354 [2021-06-05 14:02:14,926 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 339 [2021-06-05 14:02:15,183 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 423 [2021-06-05 14:02:15,499 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 641 DAG size of output: 483 [2021-06-05 14:02:16,136 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 1002 DAG size of output: 691 [2021-06-05 14:02:17,604 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 1870 DAG size of output: 1108 [2021-06-05 14:02:19,361 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 2044 DAG size of output: 1183 [2021-06-05 14:02:22,491 WARN L205 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 2890 DAG size of output: 1692 [2021-06-05 14:02:22,635 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 289 [2021-06-05 14:02:22,970 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 354 [2021-06-05 14:02:23,198 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 354 [2021-06-05 14:02:23,453 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 309 [2021-06-05 14:02:23,558 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 243 [2021-06-05 14:02:24,486 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 290 [2021-06-05 14:02:24,653 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 290 [2021-06-05 14:02:24,855 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 293 [2021-06-05 14:02:25,021 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 267 [2021-06-05 14:02:26,099 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 268 [2021-06-05 14:02:26,311 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 298 [2021-06-05 14:02:26,522 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 298 [2021-06-05 14:02:26,770 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 301 [2021-06-05 14:02:27,248 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 652 DAG size of output: 485 [2021-06-05 14:02:27,398 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 303 [2021-06-05 14:02:28,314 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 258 [2021-06-05 14:02:28,524 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 291 [2021-06-05 14:02:28,716 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 291 [2021-06-05 14:02:28,928 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 294 [2021-06-05 14:02:29,054 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 270 [2021-06-05 14:02:29,909 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 261 [2021-06-05 14:02:30,040 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 261 [2021-06-05 14:02:30,190 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 264 [2021-06-05 14:02:30,617 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 443 [2021-06-05 14:02:31,584 WARN L205 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 987 DAG size of output: 722 [2021-06-05 14:02:32,753 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 1072 DAG size of output: 775 [2021-06-05 14:02:37,092 WARN L205 SmtUtils]: Spent 4.33 s on a formula simplification. DAG size of input: 3707 DAG size of output: 2079 [2021-06-05 14:02:41,411 WARN L205 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 3707 DAG size of output: 2079 [2021-06-05 14:02:46,198 WARN L205 SmtUtils]: Spent 4.78 s on a formula simplification. DAG size of input: 3718 DAG size of output: 2090 [2021-06-05 14:02:46,393 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 2086 [2021-06-05 14:02:51,008 WARN L205 SmtUtils]: Spent 4.61 s on a formula simplification. DAG size of input: 2088 DAG size of output: 2316 [2021-06-05 14:02:51,166 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 1575 [2021-06-05 14:02:51,315 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 265 [2021-06-05 14:02:53,403 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 1537 DAG size of output: 1228 [2021-06-05 14:02:55,407 WARN L205 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 1226 DAG size of output: 1271 [2021-06-05 14:02:56,031 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 452 DAG size of output: 575 [2021-06-05 14:02:56,391 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 251 [2021-06-05 14:02:56,838 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 270 [2021-06-05 14:02:57,039 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 313 [2021-06-05 14:02:57,574 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 752 DAG size of output: 581 [2021-06-05 14:02:58,804 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 806 DAG size of output: 1066 [2021-06-05 14:02:59,108 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 317 [2021-06-05 14:03:00,570 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 682 DAG size of output: 578 [2021-06-05 14:03:01,277 WARN L205 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 843 DAG size of output: 694 [2021-06-05 14:03:02,625 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 1351 DAG size of output: 1077 [2021-06-05 14:03:05,589 WARN L205 SmtUtils]: Spent 2.96 s on a formula simplification. DAG size of input: 2520 DAG size of output: 1683 [2021-06-05 14:03:08,577 WARN L205 SmtUtils]: Spent 2.98 s on a formula simplification. DAG size of input: 2520 DAG size of output: 1683 [2021-06-05 14:03:11,667 WARN L205 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 2529 DAG size of output: 1364 [2021-06-05 14:03:12,598 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 273 [2021-06-05 14:03:13,599 WARN L205 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 1112 DAG size of output: 857 [2021-06-05 14:03:14,403 WARN L205 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 1112 DAG size of output: 857 [2021-06-05 14:03:15,278 WARN L205 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 1115 DAG size of output: 860 [2021-06-05 14:03:15,776 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 608 [2021-06-05 14:03:15,947 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 478 [2021-06-05 14:03:16,690 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 278 [2021-06-05 14:03:16,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:16,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:16,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:16,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 14:03:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:16,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235985423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:16,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:16,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 14:03:16,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251878779] [2021-06-05 14:03:16,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:03:16,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:16,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:03:16,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:03:16,972 INFO L87 Difference]: Start difference. First operand 1190 states and 3946 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:17,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:17,293 INFO L93 Difference]: Finished difference Result 1521 states and 4814 transitions. [2021-06-05 14:03:17,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:03:17,294 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:03:17,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:17,325 INFO L225 Difference]: With dead ends: 1521 [2021-06-05 14:03:17,325 INFO L226 Difference]: Without dead ends: 1518 [2021-06-05 14:03:17,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:03:17,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-06-05 14:03:17,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1352. [2021-06-05 14:03:17,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.37379718726869) internal successors, (4558), 1351 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:17,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4558 transitions. [2021-06-05 14:03:17,345 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4558 transitions. Word has length 21 [2021-06-05 14:03:17,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:17,345 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4558 transitions. [2021-06-05 14:03:17,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:17,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4558 transitions. [2021-06-05 14:03:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:03:17,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:17,347 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:17,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9235 [2021-06-05 14:03:17,564 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:17,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:17,564 INFO L82 PathProgramCache]: Analyzing trace with hash -518628775, now seen corresponding path program 75 times [2021-06-05 14:03:17,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:17,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202472348] [2021-06-05 14:03:17,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:17,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:17,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202472348] [2021-06-05 14:03:17,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202472348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:17,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083137202] [2021-06-05 14:03:17,685 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 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 14:03:17,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:03:17,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:17,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:03:17,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:18,324 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 14:03:18,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:18,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 14:03:19,123 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 248 [2021-06-05 14:03:19,238 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 272 [2021-06-05 14:03:19,379 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 292 [2021-06-05 14:03:20,090 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 289 [2021-06-05 14:03:20,227 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 307 [2021-06-05 14:03:20,396 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 326 [2021-06-05 14:03:20,772 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 594 DAG size of output: 482 [2021-06-05 14:03:21,238 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 612 DAG size of output: 500 [2021-06-05 14:03:21,680 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 612 DAG size of output: 500 [2021-06-05 14:03:22,217 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 516 [2021-06-05 14:03:23,245 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 518 DAG size of output: 643 [2021-06-05 14:03:23,803 WARN L205 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 475 [2021-06-05 14:03:24,325 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 474 [2021-06-05 14:03:24,542 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 316 [2021-06-05 14:03:24,777 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 332 [2021-06-05 14:03:24,982 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 325 [2021-06-05 14:03:25,925 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 217 [2021-06-05 14:03:26,082 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 239 [2021-06-05 14:03:26,862 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 216 [2021-06-05 14:03:27,131 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 301 [2021-06-05 14:03:27,993 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 249 [2021-06-05 14:03:28,794 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 371 [2021-06-05 14:03:29,408 WARN L205 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 685 DAG size of output: 520 [2021-06-05 14:03:30,183 WARN L205 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 767 DAG size of output: 574 [2021-06-05 14:03:31,148 WARN L205 SmtUtils]: Spent 961.00 ms on a formula simplification. DAG size of input: 853 DAG size of output: 633 [2021-06-05 14:03:32,147 WARN L205 SmtUtils]: Spent 995.00 ms on a formula simplification. DAG size of input: 890 DAG size of output: 657 [2021-06-05 14:03:32,374 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 333 [2021-06-05 14:03:32,564 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 336 [2021-06-05 14:03:32,744 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 287 [2021-06-05 14:03:34,266 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 232 [2021-06-05 14:03:34,495 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 366 [2021-06-05 14:03:34,842 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 411 [2021-06-05 14:03:35,034 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 301 [2021-06-05 14:03:36,333 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 263 [2021-06-05 14:03:36,577 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 361 [2021-06-05 14:03:37,248 WARN L205 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 690 DAG size of output: 569 [2021-06-05 14:03:37,928 WARN L205 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 719 DAG size of output: 583 [2021-06-05 14:03:38,783 WARN L205 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 812 DAG size of output: 644 [2021-06-05 14:03:39,792 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 895 DAG size of output: 705 [2021-06-05 14:03:42,030 WARN L205 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 1440 DAG size of output: 1133 [2021-06-05 14:03:42,499 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 450 [2021-06-05 14:03:42,694 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 316 [2021-06-05 14:03:44,202 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 260 [2021-06-05 14:03:44,449 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 341 [2021-06-05 14:03:44,779 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 367 [2021-06-05 14:03:45,160 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 395 [2021-06-05 14:03:45,640 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 417 [2021-06-05 14:03:46,544 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 296 [2021-06-05 14:03:47,187 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 410 [2021-06-05 14:03:47,495 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 438 [2021-06-05 14:03:47,888 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 471 [2021-06-05 14:03:48,794 WARN L205 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 665 [2021-06-05 14:03:49,729 WARN L205 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 992 DAG size of output: 678 [2021-06-05 14:03:49,991 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 347 [2021-06-05 14:03:50,226 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 331 [2021-06-05 14:03:50,386 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 324 [2021-06-05 14:03:51,257 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 251 [2021-06-05 14:03:51,423 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 271 [2021-06-05 14:03:52,213 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 241 [2021-06-05 14:03:52,383 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 271 [2021-06-05 14:03:52,727 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 527 DAG size of output: 418 [2021-06-05 14:03:52,930 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 310 [2021-06-05 14:03:53,954 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 275 [2021-06-05 14:03:54,621 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 365 [2021-06-05 14:03:55,273 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 549 [2021-06-05 14:03:56,114 WARN L205 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 815 DAG size of output: 620 [2021-06-05 14:03:56,982 WARN L205 SmtUtils]: Spent 862.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 634 [2021-06-05 14:03:58,035 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 938 DAG size of output: 703 [2021-06-05 14:04:00,135 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 1564 DAG size of output: 1152 [2021-06-05 14:04:02,743 WARN L205 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 1734 DAG size of output: 1295 [2021-06-05 14:04:08,104 WARN L205 SmtUtils]: Spent 5.35 s on a formula simplification. DAG size of input: 2788 DAG size of output: 2064 [2021-06-05 14:04:13,722 WARN L205 SmtUtils]: Spent 5.61 s on a formula simplification. DAG size of input: 2928 DAG size of output: 2124 [2021-06-05 14:04:20,954 WARN L205 SmtUtils]: Spent 7.22 s on a formula simplification. DAG size of input: 3163 DAG size of output: 2214 [2021-06-05 14:04:28,205 WARN L205 SmtUtils]: Spent 7.24 s on a formula simplification. DAG size of input: 3163 DAG size of output: 2214 [2021-06-05 14:04:36,060 WARN L205 SmtUtils]: Spent 7.85 s on a formula simplification. DAG size of input: 3174 DAG size of output: 2225 [2021-06-05 14:04:36,800 WARN L205 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 2225 DAG size of output: 2208 [2021-06-05 14:04:48,754 WARN L205 SmtUtils]: Spent 11.94 s on a formula simplification. DAG size of input: 2137 DAG size of output: 2835 [2021-06-05 14:04:51,401 WARN L205 SmtUtils]: Spent 2.64 s on a formula simplification. DAG size of input: 1075 DAG size of output: 1188 [2021-06-05 14:04:53,290 WARN L205 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 838 DAG size of output: 931 [2021-06-05 14:04:53,583 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 318 [2021-06-05 14:04:53,771 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 383 [2021-06-05 14:04:53,894 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 214 [2021-06-05 14:04:54,402 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 273 [2021-06-05 14:04:54,806 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 328 [2021-06-05 14:04:55,519 WARN L205 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 1012 DAG size of output: 535 [2021-06-05 14:04:57,035 WARN L205 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 601 DAG size of output: 858 [2021-06-05 14:04:57,526 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 436 [2021-06-05 14:04:57,866 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 321 [2021-06-05 14:04:58,495 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 248 [2021-06-05 14:04:58,648 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 256 [2021-06-05 14:04:59,208 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 510 [2021-06-05 14:05:00,243 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 1520 DAG size of output: 716 [2021-06-05 14:05:02,380 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 1982 DAG size of output: 1850 [2021-06-05 14:05:05,893 WARN L205 SmtUtils]: Spent 3.50 s on a formula simplification. DAG size of input: 1065 DAG size of output: 1160 [2021-06-05 14:05:07,232 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 616 DAG size of output: 881 [2021-06-05 14:05:08,531 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 605 DAG size of output: 873 [2021-06-05 14:05:08,667 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 592 DAG size of output: 559 [2021-06-05 14:05:09,063 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 360 [2021-06-05 14:05:09,189 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 245 [2021-06-05 14:05:09,761 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 252 [2021-06-05 14:05:09,937 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 316 [2021-06-05 14:05:10,373 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 487 [2021-06-05 14:05:11,315 WARN L205 SmtUtils]: Spent 935.00 ms on a formula simplification. DAG size of input: 1169 DAG size of output: 828 [2021-06-05 14:05:12,255 WARN L205 SmtUtils]: Spent 929.00 ms on a formula simplification. DAG size of input: 796 DAG size of output: 592 [2021-06-05 14:05:12,749 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 343 [2021-06-05 14:05:12,909 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 364 [2021-06-05 14:05:13,201 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 367 [2021-06-05 14:05:13,763 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 269 [2021-06-05 14:05:14,000 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 405 [2021-06-05 14:05:14,363 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 657 DAG size of output: 463 [2021-06-05 14:05:15,114 WARN L205 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 1049 DAG size of output: 630 [2021-06-05 14:05:17,047 WARN L205 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 1986 DAG size of output: 1308 [2021-06-05 14:05:19,952 WARN L205 SmtUtils]: Spent 2.90 s on a formula simplification. DAG size of input: 2724 DAG size of output: 1643 [2021-06-05 14:05:23,607 WARN L205 SmtUtils]: Spent 3.64 s on a formula simplification. DAG size of input: 3974 DAG size of output: 1745 [2021-06-05 14:05:27,800 WARN L205 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 4043 DAG size of output: 1781 [2021-06-05 14:05:31,993 WARN L205 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 4043 DAG size of output: 1781 [2021-06-05 14:05:36,435 WARN L205 SmtUtils]: Spent 4.41 s on a formula simplification. DAG size of input: 4048 DAG size of output: 1786 [2021-06-05 14:05:38,702 WARN L205 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 1788 DAG size of output: 1154 [2021-06-05 14:05:38,870 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 861 DAG size of output: 861 [2021-06-05 14:05:40,104 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 858 DAG size of output: 808 [2021-06-05 14:05:40,256 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 194 [2021-06-05 14:05:40,702 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 275 [2021-06-05 14:05:41,258 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 344 [2021-06-05 14:05:41,597 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 666 DAG size of output: 437 [2021-06-05 14:05:42,008 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 671 DAG size of output: 440 [2021-06-05 14:05:42,431 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 372 [2021-06-05 14:05:42,609 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 254 [2021-06-05 14:05:43,016 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 235 [2021-06-05 14:05:43,629 WARN L205 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 592 [2021-06-05 14:05:44,259 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 592 [2021-06-05 14:05:44,940 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 904 DAG size of output: 594 [2021-06-05 14:05:45,537 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 231 [2021-06-05 14:05:45,647 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 231 [2021-06-05 14:05:45,764 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 235 [2021-06-05 14:05:45,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:45,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:45,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:05:45,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 14:05:45,940 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:45,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083137202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:45,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:45,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 14:05:45,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796015427] [2021-06-05 14:05:45,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:05:45,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:45,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:05:45,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:05:45,941 INFO L87 Difference]: Start difference. First operand 1352 states and 4558 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:46,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:46,160 INFO L93 Difference]: Finished difference Result 1650 states and 5275 transitions. [2021-06-05 14:05:46,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:05:46,160 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:05:46,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:46,163 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 14:05:46,163 INFO L226 Difference]: Without dead ends: 1647 [2021-06-05 14:05:46,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 372.5ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:05:46,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-06-05 14:05:46,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1485. [2021-06-05 14:05:46,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 3.391509433962264) internal successors, (5033), 1484 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 5033 transitions. [2021-06-05 14:05:46,200 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 5033 transitions. Word has length 21 [2021-06-05 14:05:46,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:46,200 INFO L482 AbstractCegarLoop]: Abstraction has 1485 states and 5033 transitions. [2021-06-05 14:05:46,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:46,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 5033 transitions. [2021-06-05 14:05:46,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:05:46,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:46,202 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:46,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11252,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:46,433 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:46,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:46,433 INFO L82 PathProgramCache]: Analyzing trace with hash 589268377, now seen corresponding path program 76 times [2021-06-05 14:05:46,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:46,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686378538] [2021-06-05 14:05:46,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:05:46,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:46,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686378538] [2021-06-05 14:05:46,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686378538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:46,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401102026] [2021-06-05 14:05:46,500 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 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 14:05:46,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:05:46,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:46,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:05:46,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:46,926 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 14:05:46,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:46,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 14:05:47,669 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 278 [2021-06-05 14:05:47,810 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 283 [2021-06-05 14:05:47,982 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 303 [2021-06-05 14:05:48,153 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 303 [2021-06-05 14:05:48,374 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 318 [2021-06-05 14:05:48,727 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 388 [2021-06-05 14:05:49,209 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 416 [2021-06-05 14:05:49,420 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 323 [2021-06-05 14:05:49,634 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 340 [2021-06-05 14:05:49,800 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 286 [2021-06-05 14:05:50,323 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 318 [2021-06-05 14:05:50,562 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 273 [2021-06-05 14:05:51,214 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 243 [2021-06-05 14:05:51,811 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 350 [2021-06-05 14:05:52,024 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 530 DAG size of output: 364 [2021-06-05 14:05:52,385 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 640 DAG size of output: 457 [2021-06-05 14:05:52,809 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 686 DAG size of output: 501 [2021-06-05 14:05:53,420 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 807 DAG size of output: 609 [2021-06-05 14:05:53,911 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 295 [2021-06-05 14:05:54,949 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 221 [2021-06-05 14:05:55,115 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 263 [2021-06-05 14:05:55,377 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 324 [2021-06-05 14:05:55,702 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 362 [2021-06-05 14:05:56,616 WARN L205 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 1218 DAG size of output: 764 [2021-06-05 14:05:57,824 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 1311 DAG size of output: 833 [2021-06-05 14:05:59,332 WARN L205 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 1466 DAG size of output: 958 [2021-06-05 14:05:59,784 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 383 [2021-06-05 14:06:00,006 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 332 [2021-06-05 14:06:00,420 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 297 [2021-06-05 14:06:01,204 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 234 [2021-06-05 14:06:01,347 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 279 [2021-06-05 14:06:01,691 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 347 [2021-06-05 14:06:02,123 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 376 [2021-06-05 14:06:02,385 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 249 [2021-06-05 14:06:02,560 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 195 [2021-06-05 14:06:03,101 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 227 [2021-06-05 14:06:03,213 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 256 [2021-06-05 14:06:03,879 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 234 [2021-06-05 14:06:04,167 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 380 [2021-06-05 14:06:04,621 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 461 [2021-06-05 14:06:05,190 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 492 [2021-06-05 14:06:06,254 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 1016 DAG size of output: 713 [2021-06-05 14:06:07,616 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 1150 DAG size of output: 764 [2021-06-05 14:06:10,700 WARN L205 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 2259 DAG size of output: 1437 [2021-06-05 14:06:13,807 WARN L205 SmtUtils]: Spent 3.10 s on a formula simplification. DAG size of input: 2259 DAG size of output: 1437 [2021-06-05 14:06:17,153 WARN L205 SmtUtils]: Spent 3.34 s on a formula simplification. DAG size of input: 2266 DAG size of output: 1444 [2021-06-05 14:06:17,289 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 1444 [2021-06-05 14:06:17,471 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 249 [2021-06-05 14:06:19,243 WARN L205 SmtUtils]: Spent 972.00 ms on a formula simplification. DAG size of input: 820 DAG size of output: 704 [2021-06-05 14:06:19,513 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 322 [2021-06-05 14:06:20,135 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 208 [2021-06-05 14:06:20,239 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 208 [2021-06-05 14:06:20,615 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 508 [2021-06-05 14:06:20,916 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 568 [2021-06-05 14:06:22,010 WARN L205 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 581 [2021-06-05 14:06:22,819 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 277 [2021-06-05 14:06:23,349 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 250 [2021-06-05 14:06:23,521 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 276 [2021-06-05 14:06:23,723 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 296 [2021-06-05 14:06:23,962 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 287 [2021-06-05 14:06:24,205 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 287 [2021-06-05 14:06:24,543 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 377 [2021-06-05 14:06:24,996 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 1071 DAG size of output: 518 [2021-06-05 14:06:25,761 WARN L205 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 773 DAG size of output: 772 [2021-06-05 14:06:25,887 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 769 DAG size of output: 756 [2021-06-05 14:06:26,575 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 720 DAG size of output: 525 [2021-06-05 14:06:27,004 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 349 [2021-06-05 14:06:28,151 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 229 [2021-06-05 14:06:28,303 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 270 [2021-06-05 14:06:28,532 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 310 [2021-06-05 14:06:28,702 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 577 DAG size of output: 311 [2021-06-05 14:06:29,396 WARN L205 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 1454 DAG size of output: 669 [2021-06-05 14:06:30,081 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 1454 DAG size of output: 669 [2021-06-05 14:06:30,841 WARN L205 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 1459 DAG size of output: 674 [2021-06-05 14:06:31,564 WARN L205 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 676 DAG size of output: 701 [2021-06-05 14:06:31,764 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 240 [2021-06-05 14:06:32,393 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 450 [2021-06-05 14:06:32,649 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 211 [2021-06-05 14:06:33,132 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 336 [2021-06-05 14:06:33,364 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 384 [2021-06-05 14:06:33,610 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 384 [2021-06-05 14:06:33,864 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 383 [2021-06-05 14:06:34,162 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 474 [2021-06-05 14:06:34,440 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 426 [2021-06-05 14:06:34,851 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 284 [2021-06-05 14:06:35,142 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 244 [2021-06-05 14:06:35,254 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 244 [2021-06-05 14:06:35,412 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 236 [2021-06-05 14:06:35,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:06:35,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:35,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:06:35,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 14:06:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:35,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401102026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:35,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:35,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 14:06:35,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041768120] [2021-06-05 14:06:35,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:06:35,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:35,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:06:35,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:06:35,686 INFO L87 Difference]: Start difference. First operand 1485 states and 5033 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:35,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:35,908 INFO L93 Difference]: Finished difference Result 1787 states and 5757 transitions. [2021-06-05 14:06:35,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:06:35,909 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:06:35,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:35,928 INFO L225 Difference]: With dead ends: 1787 [2021-06-05 14:06:35,928 INFO L226 Difference]: Without dead ends: 1784 [2021-06-05 14:06:35,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:06:35,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-05 14:06:35,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1621. [2021-06-05 14:06:35,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.404938271604938) internal successors, (5516), 1620 states have internal predecessors, (5516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:35,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5516 transitions. [2021-06-05 14:06:35,967 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5516 transitions. Word has length 21 [2021-06-05 14:06:35,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:35,967 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 5516 transitions. [2021-06-05 14:06:35,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:35,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5516 transitions. [2021-06-05 14:06:35,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:06:35,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:35,969 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:36,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15100 [2021-06-05 14:06:36,189 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:36,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:36,189 INFO L82 PathProgramCache]: Analyzing trace with hash 574341721, now seen corresponding path program 77 times [2021-06-05 14:06:36,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:36,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902074369] [2021-06-05 14:06:36,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:06:36,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:36,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902074369] [2021-06-05 14:06:36,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902074369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:36,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982949152] [2021-06-05 14:06:36,265 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 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 14:06:36,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:06:36,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:36,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:06:36,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:36,707 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 14:06:36,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:36,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 14:06:37,401 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 300 [2021-06-05 14:06:37,553 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 316 [2021-06-05 14:06:37,739 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 339 [2021-06-05 14:06:37,925 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 339 [2021-06-05 14:06:38,148 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 355 [2021-06-05 14:06:38,500 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 449 [2021-06-05 14:06:39,069 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 482 [2021-06-05 14:06:39,267 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 310 [2021-06-05 14:06:39,386 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 289 [2021-06-05 14:06:39,554 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 239 [2021-06-05 14:06:40,402 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 239 [2021-06-05 14:06:40,593 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 257 [2021-06-05 14:06:41,491 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 242 [2021-06-05 14:06:41,735 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 318 [2021-06-05 14:06:42,619 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 210 [2021-06-05 14:06:42,758 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 245 [2021-06-05 14:06:43,692 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 208 [2021-06-05 14:06:43,856 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 245 [2021-06-05 14:06:44,190 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 335 [2021-06-05 14:06:44,834 WARN L205 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 919 DAG size of output: 534 [2021-06-05 14:06:45,762 WARN L205 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 1151 DAG size of output: 739 [2021-06-05 14:06:46,917 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 1322 DAG size of output: 850 [2021-06-05 14:06:48,052 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 1322 DAG size of output: 850 [2021-06-05 14:06:49,303 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 1333 DAG size of output: 861 [2021-06-05 14:06:52,205 WARN L205 SmtUtils]: Spent 2.90 s on a formula simplification. DAG size of input: 863 DAG size of output: 853 [2021-06-05 14:06:53,971 WARN L205 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 840 DAG size of output: 1003 [2021-06-05 14:06:54,239 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 434 [2021-06-05 14:06:54,359 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 194 [2021-06-05 14:06:56,363 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 299 [2021-06-05 14:06:56,932 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 526 DAG size of output: 370 [2021-06-05 14:06:57,340 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 457 [2021-06-05 14:06:58,244 WARN L205 SmtUtils]: Spent 898.00 ms on a formula simplification. DAG size of input: 1159 DAG size of output: 615 [2021-06-05 14:06:59,792 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 1357 DAG size of output: 702 [2021-06-05 14:07:00,872 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 1357 DAG size of output: 702 [2021-06-05 14:07:02,030 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 1362 DAG size of output: 707 [2021-06-05 14:07:02,709 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 709 DAG size of output: 792 [2021-06-05 14:07:03,185 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 483 [2021-06-05 14:07:03,543 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 383 [2021-06-05 14:07:04,135 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 330 [2021-06-05 14:07:04,285 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 330 [2021-06-05 14:07:04,444 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 491 DAG size of output: 334 [2021-06-05 14:07:05,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:05,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:05,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:07:05,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 14:07:05,460 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:05,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982949152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:05,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:05,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 14:07:05,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825850295] [2021-06-05 14:07:05,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:07:05,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:05,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:07:05,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:07:05,461 INFO L87 Difference]: Start difference. First operand 1621 states and 5516 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:05,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:05,772 INFO L93 Difference]: Finished difference Result 1931 states and 6243 transitions. [2021-06-05 14:07:05,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:07:05,772 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:07:05,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:05,775 INFO L225 Difference]: With dead ends: 1931 [2021-06-05 14:07:05,775 INFO L226 Difference]: Without dead ends: 1928 [2021-06-05 14:07:05,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 255.7ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:07:05,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-06-05 14:07:05,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1762. [2021-06-05 14:07:05,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 3.4077228847245884) internal successors, (6001), 1761 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:05,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 6001 transitions. [2021-06-05 14:07:05,798 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 6001 transitions. Word has length 21 [2021-06-05 14:07:05,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:05,799 INFO L482 AbstractCegarLoop]: Abstraction has 1762 states and 6001 transitions. [2021-06-05 14:07:05,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:05,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 6001 transitions. [2021-06-05 14:07:05,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:07:05,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:05,801 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:06,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16805,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:06,018 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:06,018 INFO L82 PathProgramCache]: Analyzing trace with hash 111615385, now seen corresponding path program 78 times [2021-06-05 14:07:06,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:06,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346376210] [2021-06-05 14:07:06,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:07:06,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:06,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346376210] [2021-06-05 14:07:06,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346376210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:06,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356457801] [2021-06-05 14:07:06,084 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 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 14:07:06,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:07:06,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:06,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:07:06,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:06,511 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 14:07:06,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:06,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 14:07:07,093 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 308 [2021-06-05 14:07:07,229 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 319 [2021-06-05 14:07:07,900 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 419 [2021-06-05 14:07:08,658 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 301 [2021-06-05 14:07:09,087 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 833 DAG size of output: 613 [2021-06-05 14:07:09,524 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 833 DAG size of output: 613 [2021-06-05 14:07:10,030 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 850 DAG size of output: 631 [2021-06-05 14:07:10,597 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 700 [2021-06-05 14:07:10,741 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 621 [2021-06-05 14:07:10,850 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 257 [2021-06-05 14:07:11,814 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 333 [2021-06-05 14:07:13,406 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 273 [2021-06-05 14:07:13,614 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 332 [2021-06-05 14:07:13,880 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 365 [2021-06-05 14:07:14,305 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 661 DAG size of output: 459 [2021-06-05 14:07:14,821 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 522 [2021-06-05 14:07:15,349 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 522 [2021-06-05 14:07:16,079 WARN L205 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 770 DAG size of output: 554 [2021-06-05 14:07:16,596 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 548 [2021-06-05 14:07:16,771 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 514 [2021-06-05 14:07:16,902 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 449 [2021-06-05 14:07:17,674 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 263 [2021-06-05 14:07:18,086 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 214 [2021-06-05 14:07:18,234 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 249 [2021-06-05 14:07:18,381 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 249 [2021-06-05 14:07:18,549 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 260 [2021-06-05 14:07:18,698 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 265 [2021-06-05 14:07:18,801 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 189 [2021-06-05 14:07:18,912 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 209 [2021-06-05 14:07:19,626 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 222 [2021-06-05 14:07:20,584 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 328 [2021-06-05 14:07:20,770 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 328 [2021-06-05 14:07:20,956 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 332 [2021-06-05 14:07:21,160 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 353 [2021-06-05 14:07:21,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:21,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:21,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:07:21,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 14:07:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:21,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356457801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:21,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:21,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 14:07:21,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223392863] [2021-06-05 14:07:21,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:07:21,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:21,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:07:21,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:07:21,802 INFO L87 Difference]: Start difference. First operand 1762 states and 6001 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:22,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:22,089 INFO L93 Difference]: Finished difference Result 2066 states and 6683 transitions. [2021-06-05 14:07:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:07:22,089 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:07:22,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:22,092 INFO L225 Difference]: With dead ends: 2066 [2021-06-05 14:07:22,092 INFO L226 Difference]: Without dead ends: 2063 [2021-06-05 14:07:22,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 222.2ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:07:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-05 14:07:22,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1892. [2021-06-05 14:07:22,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.4045478582760444) internal successors, (6438), 1891 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:22,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6438 transitions. [2021-06-05 14:07:22,115 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6438 transitions. Word has length 21 [2021-06-05 14:07:22,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:22,115 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6438 transitions. [2021-06-05 14:07:22,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:22,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6438 transitions. [2021-06-05 14:07:22,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:07:22,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:22,118 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:22,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18613,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:22,331 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:22,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:22,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1347999143, now seen corresponding path program 79 times [2021-06-05 14:07:22,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:22,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903451636] [2021-06-05 14:07:22,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:07:22,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:22,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903451636] [2021-06-05 14:07:22,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903451636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:22,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589777228] [2021-06-05 14:07:22,392 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 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 14:07:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:22,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:07:22,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:22,770 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 14:07:22,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:22,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 14:07:23,574 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 227 [2021-06-05 14:07:23,732 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 285 [2021-06-05 14:07:23,896 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 285 [2021-06-05 14:07:24,089 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 300 [2021-06-05 14:07:24,216 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 247 [2021-06-05 14:07:25,086 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 177 [2021-06-05 14:07:25,224 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 212 [2021-06-05 14:07:25,449 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 274 [2021-06-05 14:07:25,614 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 257 [2021-06-05 14:07:26,808 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 240 [2021-06-05 14:07:27,010 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 306 [2021-06-05 14:07:27,305 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 482 DAG size of output: 360 [2021-06-05 14:07:27,657 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 389 [2021-06-05 14:07:27,816 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 259 [2021-06-05 14:07:28,978 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 222 [2021-06-05 14:07:29,192 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 291 [2021-06-05 14:07:29,447 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 320 [2021-06-05 14:07:30,096 WARN L205 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 845 DAG size of output: 499 [2021-06-05 14:07:30,909 WARN L205 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 1057 DAG size of output: 607 [2021-06-05 14:07:31,874 WARN L205 SmtUtils]: Spent 960.00 ms on a formula simplification. DAG size of input: 1105 DAG size of output: 633 [2021-06-05 14:07:32,136 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 239 [2021-06-05 14:07:32,240 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 223 [2021-06-05 14:07:33,374 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 195 [2021-06-05 14:07:33,560 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 252 [2021-06-05 14:07:33,861 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 273 [2021-06-05 14:07:34,163 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 333 [2021-06-05 14:07:34,552 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 367 [2021-06-05 14:07:34,661 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 233 [2021-06-05 14:07:35,904 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 191 [2021-06-05 14:07:36,056 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 236 [2021-06-05 14:07:36,288 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 275 [2021-06-05 14:07:36,650 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 297 [2021-06-05 14:07:37,055 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 336 [2021-06-05 14:07:37,913 WARN L205 SmtUtils]: Spent 855.00 ms on a formula simplification. DAG size of input: 797 DAG size of output: 520 [2021-06-05 14:07:39,245 WARN L205 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 867 DAG size of output: 562 [2021-06-05 14:07:40,307 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 898 DAG size of output: 565 [2021-06-05 14:07:42,576 WARN L205 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 1765 DAG size of output: 1009 [2021-06-05 14:07:44,842 WARN L205 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 1765 DAG size of output: 1009 [2021-06-05 14:07:47,284 WARN L205 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 1772 DAG size of output: 1016 [2021-06-05 14:07:50,013 WARN L205 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 1018 DAG size of output: 1191 [2021-06-05 14:07:50,349 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 698 [2021-06-05 14:07:50,937 WARN L205 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 575 [2021-06-05 14:07:51,192 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 518 [2021-06-05 14:07:52,157 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 241 [2021-06-05 14:07:52,357 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 268 [2021-06-05 14:07:52,619 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 370 [2021-06-05 14:07:52,880 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 370 [2021-06-05 14:07:53,130 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 334 [2021-06-05 14:07:53,984 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 789 DAG size of output: 336 [2021-06-05 14:07:54,814 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 247 [2021-06-05 14:07:54,945 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 247 [2021-06-05 14:07:55,071 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 252 [2021-06-05 14:07:55,186 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 253 [2021-06-05 14:07:56,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:56,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:56,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:07:56,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 14:07:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:56,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589777228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:56,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:56,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 14:07:56,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948988875] [2021-06-05 14:07:56,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:07:56,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:56,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:07:56,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:07:56,037 INFO L87 Difference]: Start difference. First operand 1892 states and 6438 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:56,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:56,378 INFO L93 Difference]: Finished difference Result 2152 states and 7005 transitions. [2021-06-05 14:07:56,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:07:56,378 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:07:56,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:56,382 INFO L225 Difference]: With dead ends: 2152 [2021-06-05 14:07:56,382 INFO L226 Difference]: Without dead ends: 2149 [2021-06-05 14:07:56,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 212.2ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:07:56,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-05 14:07:56,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1999. [2021-06-05 14:07:56,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1998 states have (on average 3.403903903903904) internal successors, (6801), 1998 states have internal predecessors, (6801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:56,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 6801 transitions. [2021-06-05 14:07:56,440 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 6801 transitions. Word has length 21 [2021-06-05 14:07:56,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:56,440 INFO L482 AbstractCegarLoop]: Abstraction has 1999 states and 6801 transitions. [2021-06-05 14:07:56,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:56,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 6801 transitions. [2021-06-05 14:07:56,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:07:56,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:56,443 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:56,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19836,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:56,644 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:56,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:56,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1614345671, now seen corresponding path program 80 times [2021-06-05 14:07:56,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:56,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028689207] [2021-06-05 14:07:56,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:56,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:56,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:56,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028689207] [2021-06-05 14:07:56,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028689207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:56,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440992575] [2021-06-05 14:07:56,752 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 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 14:07:56,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:07:56,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:56,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:07:56,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:56,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440992575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:56,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:56,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:07:56,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422293335] [2021-06-05 14:07:56,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:07:56,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:56,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:07:56,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:07:56,826 INFO L87 Difference]: Start difference. First operand 1999 states and 6801 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:56,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:56,998 INFO L93 Difference]: Finished difference Result 2169 states and 6986 transitions. [2021-06-05 14:07:56,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:07:56,998 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:07:56,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:57,001 INFO L225 Difference]: With dead ends: 2169 [2021-06-05 14:07:57,001 INFO L226 Difference]: Without dead ends: 2169 [2021-06-05 14:07:57,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 182.3ms TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:07:57,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-06-05 14:07:57,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1932. [2021-06-05 14:07:57,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.3858104609010877) internal successors, (6538), 1931 states have internal predecessors, (6538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:57,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6538 transitions. [2021-06-05 14:07:57,024 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6538 transitions. Word has length 22 [2021-06-05 14:07:57,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:57,024 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 6538 transitions. [2021-06-05 14:07:57,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:57,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6538 transitions. [2021-06-05 14:07:57,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:07:57,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:57,027 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:57,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21446 [2021-06-05 14:07:57,227 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:57,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:57,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1020889444, now seen corresponding path program 81 times [2021-06-05 14:07:57,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:57,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153782881] [2021-06-05 14:07:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:57,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:57,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153782881] [2021-06-05 14:07:57,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153782881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:57,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365948632] [2021-06-05 14:07:57,340 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 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 14:07:57,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:07:57,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:57,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:07:57,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:57,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365948632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:57,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:57,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:07:57,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184113973] [2021-06-05 14:07:57,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:07:57,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:57,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:07:57,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:07:57,439 INFO L87 Difference]: Start difference. First operand 1932 states and 6538 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:57,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:57,730 INFO L93 Difference]: Finished difference Result 2262 states and 7074 transitions. [2021-06-05 14:07:57,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 14:07:57,731 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:07:57,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:57,734 INFO L225 Difference]: With dead ends: 2262 [2021-06-05 14:07:57,734 INFO L226 Difference]: Without dead ends: 2255 [2021-06-05 14:07:57,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 259.8ms TimeCoverageRelationStatistics Valid=476, Invalid=930, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:07:57,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-06-05 14:07:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 1969. [2021-06-05 14:07:57,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.374491869918699) internal successors, (6641), 1968 states have internal predecessors, (6641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:57,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6641 transitions. [2021-06-05 14:07:57,762 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6641 transitions. Word has length 22 [2021-06-05 14:07:57,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:57,762 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 6641 transitions. [2021-06-05 14:07:57,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:57,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6641 transitions. [2021-06-05 14:07:57,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:07:57,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:57,766 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:57,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21447 [2021-06-05 14:07:57,978 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:57,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:57,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1440007587, now seen corresponding path program 82 times [2021-06-05 14:07:57,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:57,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850683707] [2021-06-05 14:07:57,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:58,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:58,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850683707] [2021-06-05 14:07:58,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850683707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:58,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119896276] [2021-06-05 14:07:58,076 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 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 14:07:58,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:07:58,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:58,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:07:58,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:58,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119896276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:58,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:58,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:07:58,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117892765] [2021-06-05 14:07:58,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:07:58,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:58,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:07:58,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:07:58,134 INFO L87 Difference]: Start difference. First operand 1969 states and 6641 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:58,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:58,291 INFO L93 Difference]: Finished difference Result 2016 states and 6708 transitions. [2021-06-05 14:07:58,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:07:58,292 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:07:58,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:58,294 INFO L225 Difference]: With dead ends: 2016 [2021-06-05 14:07:58,294 INFO L226 Difference]: Without dead ends: 2015 [2021-06-05 14:07:58,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:07:58,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2021-06-05 14:07:58,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1969. [2021-06-05 14:07:58,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.3719512195121952) internal successors, (6636), 1968 states have internal predecessors, (6636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:58,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6636 transitions. [2021-06-05 14:07:58,316 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6636 transitions. Word has length 22 [2021-06-05 14:07:58,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:58,317 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 6636 transitions. [2021-06-05 14:07:58,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:58,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6636 transitions. [2021-06-05 14:07:58,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:07:58,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:58,319 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:58,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21448,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:58,534 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:58,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:58,534 INFO L82 PathProgramCache]: Analyzing trace with hash -517588854, now seen corresponding path program 83 times [2021-06-05 14:07:58,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:58,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015285340] [2021-06-05 14:07:58,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:58,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:58,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015285340] [2021-06-05 14:07:58,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015285340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:58,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371807093] [2021-06-05 14:07:58,659 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 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 14:07:58,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:07:58,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:58,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:07:58,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:58,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371807093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:58,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:58,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:07:58,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218446288] [2021-06-05 14:07:58,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:07:58,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:58,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:07:58,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:07:58,724 INFO L87 Difference]: Start difference. First operand 1969 states and 6636 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:58,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:58,789 INFO L93 Difference]: Finished difference Result 2320 states and 7225 transitions. [2021-06-05 14:07:58,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:07:58,789 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:07:58,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:58,792 INFO L225 Difference]: With dead ends: 2320 [2021-06-05 14:07:58,792 INFO L226 Difference]: Without dead ends: 2320 [2021-06-05 14:07:58,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:07:58,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-06-05 14:07:58,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1919. [2021-06-05 14:07:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 3.3628779979144943) internal successors, (6450), 1918 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:58,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 6450 transitions. [2021-06-05 14:07:58,819 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 6450 transitions. Word has length 22 [2021-06-05 14:07:58,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:58,819 INFO L482 AbstractCegarLoop]: Abstraction has 1919 states and 6450 transitions. [2021-06-05 14:07:58,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:58,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 6450 transitions. [2021-06-05 14:07:58,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:07:58,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:58,821 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:59,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21449 [2021-06-05 14:07:59,029 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:59,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:59,029 INFO L82 PathProgramCache]: Analyzing trace with hash -408136825, now seen corresponding path program 84 times [2021-06-05 14:07:59,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:59,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140226226] [2021-06-05 14:07:59,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:59,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:59,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140226226] [2021-06-05 14:07:59,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140226226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:59,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950026272] [2021-06-05 14:07:59,119 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 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 14:07:59,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:07:59,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:59,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:07:59,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:07:59,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950026272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:59,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:59,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:07:59,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679953806] [2021-06-05 14:07:59,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:07:59,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:59,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:07:59,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:07:59,190 INFO L87 Difference]: Start difference. First operand 1919 states and 6450 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:59,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:59,311 INFO L93 Difference]: Finished difference Result 2210 states and 6903 transitions. [2021-06-05 14:07:59,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:07:59,311 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:07:59,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:59,314 INFO L225 Difference]: With dead ends: 2210 [2021-06-05 14:07:59,314 INFO L226 Difference]: Without dead ends: 2210 [2021-06-05 14:07:59,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:07:59,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-06-05 14:07:59,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1916. [2021-06-05 14:07:59,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1915 states have (on average 3.3383812010443865) internal successors, (6393), 1915 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 6393 transitions. [2021-06-05 14:07:59,341 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 6393 transitions. Word has length 22 [2021-06-05 14:07:59,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:59,341 INFO L482 AbstractCegarLoop]: Abstraction has 1916 states and 6393 transitions. [2021-06-05 14:07:59,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:59,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 6393 transitions. [2021-06-05 14:07:59,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:07:59,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:59,344 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:59,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21450,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:59,545 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:59,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:59,545 INFO L82 PathProgramCache]: Analyzing trace with hash 675153308, now seen corresponding path program 85 times [2021-06-05 14:07:59,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:59,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28063924] [2021-06-05 14:07:59,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:59,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:59,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28063924] [2021-06-05 14:07:59,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28063924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:59,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921300251] [2021-06-05 14:07:59,644 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 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 14:07:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:59,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:07:59,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:07:59,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921300251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:59,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:59,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:07:59,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504324157] [2021-06-05 14:07:59,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:07:59,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:59,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:07:59,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:07:59,701 INFO L87 Difference]: Start difference. First operand 1916 states and 6393 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:59,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:59,861 INFO L93 Difference]: Finished difference Result 2207 states and 6832 transitions. [2021-06-05 14:07:59,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:07:59,861 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:07:59,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:59,864 INFO L225 Difference]: With dead ends: 2207 [2021-06-05 14:07:59,864 INFO L226 Difference]: Without dead ends: 2205 [2021-06-05 14:07:59,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:07:59,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-06-05 14:07:59,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 1928. [2021-06-05 14:07:59,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.3388687078360144) internal successors, (6434), 1927 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:59,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6434 transitions. [2021-06-05 14:07:59,891 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6434 transitions. Word has length 22 [2021-06-05 14:07:59,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:59,891 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 6434 transitions. [2021-06-05 14:07:59,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:59,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6434 transitions. [2021-06-05 14:07:59,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:07:59,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:59,894 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:00,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21451 [2021-06-05 14:08:00,111 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:00,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:00,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1331955485, now seen corresponding path program 86 times [2021-06-05 14:08:00,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:00,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725606359] [2021-06-05 14:08:00,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:00,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:00,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725606359] [2021-06-05 14:08:00,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725606359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:00,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67267420] [2021-06-05 14:08:00,207 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 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 14:08:00,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:00,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:00,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:00,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:00,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67267420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:00,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:00,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:08:00,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913680505] [2021-06-05 14:08:00,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:08:00,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:00,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:08:00,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:00,306 INFO L87 Difference]: Start difference. First operand 1928 states and 6434 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:00,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:00,492 INFO L93 Difference]: Finished difference Result 2091 states and 6657 transitions. [2021-06-05 14:08:00,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:08:00,493 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:00,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:00,495 INFO L225 Difference]: With dead ends: 2091 [2021-06-05 14:08:00,495 INFO L226 Difference]: Without dead ends: 2089 [2021-06-05 14:08:00,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:08:00,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-06-05 14:08:00,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1892. [2021-06-05 14:08:00,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.3400317292437864) internal successors, (6316), 1891 states have internal predecessors, (6316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6316 transitions. [2021-06-05 14:08:00,520 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6316 transitions. Word has length 22 [2021-06-05 14:08:00,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:00,520 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6316 transitions. [2021-06-05 14:08:00,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:00,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6316 transitions. [2021-06-05 14:08:00,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:00,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:00,523 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:00,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21452 [2021-06-05 14:08:00,739 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:00,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:00,739 INFO L82 PathProgramCache]: Analyzing trace with hash -2040593078, now seen corresponding path program 87 times [2021-06-05 14:08:00,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:00,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118478582] [2021-06-05 14:08:00,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:00,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:00,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118478582] [2021-06-05 14:08:00,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118478582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:00,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197394948] [2021-06-05 14:08:00,813 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 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 14:08:00,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:08:00,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:00,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:00,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:00,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197394948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:00,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:00,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:08:00,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525738301] [2021-06-05 14:08:00,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:08:00,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:00,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:08:00,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:00,879 INFO L87 Difference]: Start difference. First operand 1892 states and 6316 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:00,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:00,945 INFO L93 Difference]: Finished difference Result 2273 states and 6960 transitions. [2021-06-05 14:08:00,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:08:00,946 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:00,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:00,948 INFO L225 Difference]: With dead ends: 2273 [2021-06-05 14:08:00,948 INFO L226 Difference]: Without dead ends: 2273 [2021-06-05 14:08:00,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:00,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-06-05 14:08:00,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1896. [2021-06-05 14:08:00,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.3393139841688653) internal successors, (6328), 1895 states have internal predecessors, (6328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:00,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6328 transitions. [2021-06-05 14:08:00,971 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6328 transitions. Word has length 22 [2021-06-05 14:08:00,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:00,971 INFO L482 AbstractCegarLoop]: Abstraction has 1896 states and 6328 transitions. [2021-06-05 14:08:00,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:00,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6328 transitions. [2021-06-05 14:08:00,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:00,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:00,974 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:01,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21453,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:01,193 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:01,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:01,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1252398503, now seen corresponding path program 88 times [2021-06-05 14:08:01,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:01,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754345511] [2021-06-05 14:08:01,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:01,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:01,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754345511] [2021-06-05 14:08:01,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754345511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:01,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272304742] [2021-06-05 14:08:01,301 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 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 14:08:01,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:01,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:01,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:01,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:01,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272304742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:01,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:01,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:08:01,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068734536] [2021-06-05 14:08:01,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:01,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:01,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:01,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:01,377 INFO L87 Difference]: Start difference. First operand 1896 states and 6328 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:01,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:01,554 INFO L93 Difference]: Finished difference Result 2019 states and 6507 transitions. [2021-06-05 14:08:01,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:08:01,554 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:01,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:01,557 INFO L225 Difference]: With dead ends: 2019 [2021-06-05 14:08:01,557 INFO L226 Difference]: Without dead ends: 2017 [2021-06-05 14:08:01,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:01,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-06-05 14:08:01,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1896. [2021-06-05 14:08:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.3366754617414247) internal successors, (6323), 1895 states have internal predecessors, (6323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:01,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6323 transitions. [2021-06-05 14:08:01,580 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6323 transitions. Word has length 22 [2021-06-05 14:08:01,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:01,580 INFO L482 AbstractCegarLoop]: Abstraction has 1896 states and 6323 transitions. [2021-06-05 14:08:01,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:01,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6323 transitions. [2021-06-05 14:08:01,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:01,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:01,583 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:01,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21454,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:01,799 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:01,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:01,799 INFO L82 PathProgramCache]: Analyzing trace with hash 525326884, now seen corresponding path program 89 times [2021-06-05 14:08:01,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:01,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395290734] [2021-06-05 14:08:01,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:01,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:01,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395290734] [2021-06-05 14:08:01,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395290734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:01,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114060008] [2021-06-05 14:08:01,892 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 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 14:08:01,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:08:01,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:01,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:01,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:02,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114060008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:02,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:02,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:08:02,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001340583] [2021-06-05 14:08:02,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:02,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:02,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:02,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:02,097 INFO L87 Difference]: Start difference. First operand 1896 states and 6323 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:02,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:02,202 INFO L93 Difference]: Finished difference Result 2414 states and 7311 transitions. [2021-06-05 14:08:02,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:08:02,202 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:02,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:02,205 INFO L225 Difference]: With dead ends: 2414 [2021-06-05 14:08:02,205 INFO L226 Difference]: Without dead ends: 2414 [2021-06-05 14:08:02,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:08:02,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-06-05 14:08:02,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1844. [2021-06-05 14:08:02,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 3.3266413456321215) internal successors, (6131), 1843 states have internal predecessors, (6131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:02,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 6131 transitions. [2021-06-05 14:08:02,230 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 6131 transitions. Word has length 22 [2021-06-05 14:08:02,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:02,231 INFO L482 AbstractCegarLoop]: Abstraction has 1844 states and 6131 transitions. [2021-06-05 14:08:02,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:02,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 6131 transitions. [2021-06-05 14:08:02,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:02,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:02,233 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:02,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21455 [2021-06-05 14:08:02,451 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:02,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:02,451 INFO L82 PathProgramCache]: Analyzing trace with hash -376627513, now seen corresponding path program 90 times [2021-06-05 14:08:02,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:02,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111175578] [2021-06-05 14:08:02,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:02,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:02,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111175578] [2021-06-05 14:08:02,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111175578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:02,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771093842] [2021-06-05 14:08:02,557 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 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 14:08:02,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:08:02,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:02,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:02,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:02,623 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:02,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771093842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:02,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:02,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:08:02,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249995776] [2021-06-05 14:08:02,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:08:02,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:02,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:08:02,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:02,624 INFO L87 Difference]: Start difference. First operand 1844 states and 6131 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:02,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:02,749 INFO L93 Difference]: Finished difference Result 2122 states and 6550 transitions. [2021-06-05 14:08:02,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:08:02,749 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:02,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:02,752 INFO L225 Difference]: With dead ends: 2122 [2021-06-05 14:08:02,752 INFO L226 Difference]: Without dead ends: 2122 [2021-06-05 14:08:02,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:08:02,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-06-05 14:08:02,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1806. [2021-06-05 14:08:02,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 3.301939058171745) internal successors, (5960), 1805 states have internal predecessors, (5960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:02,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 5960 transitions. [2021-06-05 14:08:02,776 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 5960 transitions. Word has length 22 [2021-06-05 14:08:02,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:02,776 INFO L482 AbstractCegarLoop]: Abstraction has 1806 states and 5960 transitions. [2021-06-05 14:08:02,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:02,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 5960 transitions. [2021-06-05 14:08:02,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:02,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:02,778 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:02,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21456 [2021-06-05 14:08:02,997 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:02,997 INFO L82 PathProgramCache]: Analyzing trace with hash 706662620, now seen corresponding path program 91 times [2021-06-05 14:08:02,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:02,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465928339] [2021-06-05 14:08:02,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:03,063 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:03,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:03,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465928339] [2021-06-05 14:08:03,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465928339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:03,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644678378] [2021-06-05 14:08:03,063 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 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 14:08:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:03,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:03,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:03,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644678378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:03,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:03,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:08:03,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345043040] [2021-06-05 14:08:03,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:08:03,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:03,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:08:03,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:03,123 INFO L87 Difference]: Start difference. First operand 1806 states and 5960 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:03,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:03,278 INFO L93 Difference]: Finished difference Result 2095 states and 6396 transitions. [2021-06-05 14:08:03,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:08:03,279 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:03,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:03,281 INFO L225 Difference]: With dead ends: 2095 [2021-06-05 14:08:03,281 INFO L226 Difference]: Without dead ends: 2093 [2021-06-05 14:08:03,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:08:03,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-06-05 14:08:03,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 1820. [2021-06-05 14:08:03,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1819 states have (on average 3.302363936228697) internal successors, (6007), 1819 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:03,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 6007 transitions. [2021-06-05 14:08:03,304 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 6007 transitions. Word has length 22 [2021-06-05 14:08:03,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:03,305 INFO L482 AbstractCegarLoop]: Abstraction has 1820 states and 6007 transitions. [2021-06-05 14:08:03,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:03,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 6007 transitions. [2021-06-05 14:08:03,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:03,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:03,307 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:03,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21457 [2021-06-05 14:08:03,525 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:03,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:03,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1363464797, now seen corresponding path program 92 times [2021-06-05 14:08:03,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:03,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421119843] [2021-06-05 14:08:03,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:03,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:03,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421119843] [2021-06-05 14:08:03,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421119843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:03,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686985907] [2021-06-05 14:08:03,636 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 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 14:08:03,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:03,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:03,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:03,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:03,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686985907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:03,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:03,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:08:03,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103325192] [2021-06-05 14:08:03,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:08:03,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:03,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:08:03,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:03,722 INFO L87 Difference]: Start difference. First operand 1820 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:03,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:03,867 INFO L93 Difference]: Finished difference Result 1994 states and 6249 transitions. [2021-06-05 14:08:03,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:08:03,868 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:03,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:03,870 INFO L225 Difference]: With dead ends: 1994 [2021-06-05 14:08:03,871 INFO L226 Difference]: Without dead ends: 1992 [2021-06-05 14:08:03,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:08:03,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-06-05 14:08:03,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1813. [2021-06-05 14:08:03,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 3.3002207505518766) internal successors, (5980), 1812 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 5980 transitions. [2021-06-05 14:08:03,896 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 5980 transitions. Word has length 22 [2021-06-05 14:08:03,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:03,896 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 5980 transitions. [2021-06-05 14:08:03,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:03,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 5980 transitions. [2021-06-05 14:08:03,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:03,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:03,899 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:04,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21458 [2021-06-05 14:08:04,117 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:04,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:04,117 INFO L82 PathProgramCache]: Analyzing trace with hash -2009083766, now seen corresponding path program 93 times [2021-06-05 14:08:04,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:04,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104987008] [2021-06-05 14:08:04,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:04,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:04,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104987008] [2021-06-05 14:08:04,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104987008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:04,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82309868] [2021-06-05 14:08:04,236 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 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 14:08:04,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:08:04,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:04,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:04,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:04,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82309868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:04,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:04,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:08:04,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810434994] [2021-06-05 14:08:04,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:08:04,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:04,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:08:04,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:04,356 INFO L87 Difference]: Start difference. First operand 1813 states and 5980 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:04,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:04,442 INFO L93 Difference]: Finished difference Result 2201 states and 6640 transitions. [2021-06-05 14:08:04,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:08:04,442 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:04,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:04,445 INFO L225 Difference]: With dead ends: 2201 [2021-06-05 14:08:04,445 INFO L226 Difference]: Without dead ends: 2201 [2021-06-05 14:08:04,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:04,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2021-06-05 14:08:04,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 1816. [2021-06-05 14:08:04,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.299724517906336) internal successors, (5989), 1815 states have internal predecessors, (5989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5989 transitions. [2021-06-05 14:08:04,490 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5989 transitions. Word has length 22 [2021-06-05 14:08:04,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:04,490 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 5989 transitions. [2021-06-05 14:08:04,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:04,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5989 transitions. [2021-06-05 14:08:04,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:04,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:04,503 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:04,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21459,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:04,718 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:04,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:04,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1220889191, now seen corresponding path program 94 times [2021-06-05 14:08:04,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:04,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440519933] [2021-06-05 14:08:04,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:04,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:04,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440519933] [2021-06-05 14:08:04,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440519933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:04,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070304160] [2021-06-05 14:08:04,817 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 14:08:04,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:04,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:04,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:04,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:04,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070304160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:04,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:04,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:08:04,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353145673] [2021-06-05 14:08:04,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:04,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:04,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:04,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:04,941 INFO L87 Difference]: Start difference. First operand 1816 states and 5989 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:05,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:05,124 INFO L93 Difference]: Finished difference Result 1990 states and 6234 transitions. [2021-06-05 14:08:05,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:08:05,124 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:05,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:05,127 INFO L225 Difference]: With dead ends: 1990 [2021-06-05 14:08:05,127 INFO L226 Difference]: Without dead ends: 1988 [2021-06-05 14:08:05,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:05,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-06-05 14:08:05,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1816. [2021-06-05 14:08:05,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.296969696969697) internal successors, (5984), 1815 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:05,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5984 transitions. [2021-06-05 14:08:05,160 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5984 transitions. Word has length 22 [2021-06-05 14:08:05,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:05,160 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 5984 transitions. [2021-06-05 14:08:05,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:05,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5984 transitions. [2021-06-05 14:08:05,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:05,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:05,162 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:05,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21460,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:05,389 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:05,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:05,389 INFO L82 PathProgramCache]: Analyzing trace with hash 556836196, now seen corresponding path program 95 times [2021-06-05 14:08:05,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:05,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227950819] [2021-06-05 14:08:05,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:05,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:05,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227950819] [2021-06-05 14:08:05,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227950819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:05,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965332093] [2021-06-05 14:08:05,455 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 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 14:08:05,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:08:05,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:05,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:05,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:05,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965332093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:05,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:05,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:08:05,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129548801] [2021-06-05 14:08:05,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:05,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:05,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:05,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:05,533 INFO L87 Difference]: Start difference. First operand 1816 states and 5984 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:05,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:05,615 INFO L93 Difference]: Finished difference Result 2351 states and 6997 transitions. [2021-06-05 14:08:05,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:08:05,616 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:05,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:05,619 INFO L225 Difference]: With dead ends: 2351 [2021-06-05 14:08:05,619 INFO L226 Difference]: Without dead ends: 2351 [2021-06-05 14:08:05,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=139, Invalid=203, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:08:05,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-05 14:08:05,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1778. [2021-06-05 14:08:05,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 3.2830613393359593) internal successors, (5834), 1777 states have internal predecessors, (5834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:05,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 5834 transitions. [2021-06-05 14:08:05,644 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 5834 transitions. Word has length 22 [2021-06-05 14:08:05,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:05,650 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 5834 transitions. [2021-06-05 14:08:05,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:05,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 5834 transitions. [2021-06-05 14:08:05,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:05,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:05,654 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:05,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21461 [2021-06-05 14:08:05,861 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:05,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:05,861 INFO L82 PathProgramCache]: Analyzing trace with hash 268515805, now seen corresponding path program 96 times [2021-06-05 14:08:05,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:05,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527743214] [2021-06-05 14:08:05,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:05,932 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:05,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:05,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527743214] [2021-06-05 14:08:05,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527743214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:05,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494175719] [2021-06-05 14:08:05,933 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 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 14:08:05,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:08:05,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:05,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:05,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:06,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494175719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:06,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:06,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:08:06,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803538773] [2021-06-05 14:08:06,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:06,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:06,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:06,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:06,012 INFO L87 Difference]: Start difference. First operand 1778 states and 5834 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:06,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:06,215 INFO L93 Difference]: Finished difference Result 1995 states and 6375 transitions. [2021-06-05 14:08:06,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:08:06,216 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:06,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:06,219 INFO L225 Difference]: With dead ends: 1995 [2021-06-05 14:08:06,219 INFO L226 Difference]: Without dead ends: 1992 [2021-06-05 14:08:06,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:06,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-06-05 14:08:06,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1782. [2021-06-05 14:08:06,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.2824256035934867) internal successors, (5846), 1781 states have internal predecessors, (5846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:06,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 5846 transitions. [2021-06-05 14:08:06,252 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 5846 transitions. Word has length 22 [2021-06-05 14:08:06,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:06,252 INFO L482 AbstractCegarLoop]: Abstraction has 1782 states and 5846 transitions. [2021-06-05 14:08:06,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:06,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 5846 transitions. [2021-06-05 14:08:06,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:06,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:06,254 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:06,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21462 [2021-06-05 14:08:06,470 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:06,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:06,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1504023606, now seen corresponding path program 97 times [2021-06-05 14:08:06,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:06,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778382472] [2021-06-05 14:08:06,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:06,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:06,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778382472] [2021-06-05 14:08:06,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778382472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:06,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86970458] [2021-06-05 14:08:06,569 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 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 14:08:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:06,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:06,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:06,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86970458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:06,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:06,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:08:06,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102523892] [2021-06-05 14:08:06,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:06,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:06,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:06,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:06,638 INFO L87 Difference]: Start difference. First operand 1782 states and 5846 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:06,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:06,785 INFO L93 Difference]: Finished difference Result 3202 states and 10128 transitions. [2021-06-05 14:08:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:08:06,786 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:06,790 INFO L225 Difference]: With dead ends: 3202 [2021-06-05 14:08:06,790 INFO L226 Difference]: Without dead ends: 3202 [2021-06-05 14:08:06,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:08:06,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3202 states. [2021-06-05 14:08:06,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3202 to 2517. [2021-06-05 14:08:06,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2517 states, 2516 states have (on average 3.433227344992051) internal successors, (8638), 2516 states have internal predecessors, (8638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:06,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2517 states to 2517 states and 8638 transitions. [2021-06-05 14:08:06,827 INFO L78 Accepts]: Start accepts. Automaton has 2517 states and 8638 transitions. Word has length 22 [2021-06-05 14:08:06,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:06,827 INFO L482 AbstractCegarLoop]: Abstraction has 2517 states and 8638 transitions. [2021-06-05 14:08:06,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:06,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2517 states and 8638 transitions. [2021-06-05 14:08:06,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:06,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:06,830 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:07,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21463,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:07,030 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:07,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:07,031 INFO L82 PathProgramCache]: Analyzing trace with hash 600161159, now seen corresponding path program 98 times [2021-06-05 14:08:07,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:07,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320600948] [2021-06-05 14:08:07,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:07,338 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:07,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:07,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320600948] [2021-06-05 14:08:07,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320600948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:07,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388706851] [2021-06-05 14:08:07,339 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 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 14:08:07,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:07,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:07,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:07,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:07,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388706851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:07,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:07,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:08:07,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237790267] [2021-06-05 14:08:07,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:08:07,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:07,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:08:07,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:07,428 INFO L87 Difference]: Start difference. First operand 2517 states and 8638 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:07,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:07,566 INFO L93 Difference]: Finished difference Result 2785 states and 8985 transitions. [2021-06-05 14:08:07,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:08:07,566 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:07,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:07,569 INFO L225 Difference]: With dead ends: 2785 [2021-06-05 14:08:07,569 INFO L226 Difference]: Without dead ends: 2785 [2021-06-05 14:08:07,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 300.2ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:08:07,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2021-06-05 14:08:07,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2437. [2021-06-05 14:08:07,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2437 states, 2436 states have (on average 3.3973727422003286) internal successors, (8276), 2436 states have internal predecessors, (8276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 8276 transitions. [2021-06-05 14:08:07,601 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 8276 transitions. Word has length 22 [2021-06-05 14:08:07,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:07,601 INFO L482 AbstractCegarLoop]: Abstraction has 2437 states and 8276 transitions. [2021-06-05 14:08:07,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:07,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 8276 transitions. [2021-06-05 14:08:07,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:07,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:07,603 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:07,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21464 [2021-06-05 14:08:07,804 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:07,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:07,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1683451292, now seen corresponding path program 99 times [2021-06-05 14:08:07,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:07,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859421826] [2021-06-05 14:08:07,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:07,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:07,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859421826] [2021-06-05 14:08:07,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859421826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:07,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332936015] [2021-06-05 14:08:07,868 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 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 14:08:07,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:08:07,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:07,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:07,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:07,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332936015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:07,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:07,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:08:07,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364348562] [2021-06-05 14:08:07,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:08:07,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:07,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:08:07,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:07,977 INFO L87 Difference]: Start difference. First operand 2437 states and 8276 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:08,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:08,145 INFO L93 Difference]: Finished difference Result 2747 states and 8798 transitions. [2021-06-05 14:08:08,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:08:08,145 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:08,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:08,149 INFO L225 Difference]: With dead ends: 2747 [2021-06-05 14:08:08,149 INFO L226 Difference]: Without dead ends: 2745 [2021-06-05 14:08:08,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:08:08,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-06-05 14:08:08,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2476. [2021-06-05 14:08:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2475 states have (on average 3.3975757575757575) internal successors, (8409), 2475 states have internal predecessors, (8409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 8409 transitions. [2021-06-05 14:08:08,184 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 8409 transitions. Word has length 22 [2021-06-05 14:08:08,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:08,184 INFO L482 AbstractCegarLoop]: Abstraction has 2476 states and 8409 transitions. [2021-06-05 14:08:08,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:08,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 8409 transitions. [2021-06-05 14:08:08,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:08,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:08,187 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:08,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21465,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:08,403 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:08,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:08,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1954713827, now seen corresponding path program 100 times [2021-06-05 14:08:08,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:08,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581462902] [2021-06-05 14:08:08,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:08,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:08,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581462902] [2021-06-05 14:08:08,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581462902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:08,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47275103] [2021-06-05 14:08:08,497 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 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 14:08:08,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:08,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:08,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:08,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:08,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47275103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:08,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:08,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:08:08,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000518881] [2021-06-05 14:08:08,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:08:08,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:08,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:08:08,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:08,574 INFO L87 Difference]: Start difference. First operand 2476 states and 8409 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:08,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:08,742 INFO L93 Difference]: Finished difference Result 2659 states and 8666 transitions. [2021-06-05 14:08:08,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:08:08,743 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:08,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:08,746 INFO L225 Difference]: With dead ends: 2659 [2021-06-05 14:08:08,746 INFO L226 Difference]: Without dead ends: 2657 [2021-06-05 14:08:08,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:08:08,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-06-05 14:08:08,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2462. [2021-06-05 14:08:08,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2461 states have (on average 3.3933360422592442) internal successors, (8351), 2461 states have internal predecessors, (8351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:08,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 8351 transitions. [2021-06-05 14:08:08,777 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 8351 transitions. Word has length 22 [2021-06-05 14:08:08,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:08,777 INFO L482 AbstractCegarLoop]: Abstraction has 2462 states and 8351 transitions. [2021-06-05 14:08:08,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:08,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 8351 transitions. [2021-06-05 14:08:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:08,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:08,780 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:08,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21466 [2021-06-05 14:08:08,997 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:08,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:08,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1032295094, now seen corresponding path program 101 times [2021-06-05 14:08:08,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:08,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009517261] [2021-06-05 14:08:08,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:09,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:09,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009517261] [2021-06-05 14:08:09,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009517261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:09,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311256851] [2021-06-05 14:08:09,068 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 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 14:08:09,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:08:09,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:09,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:09,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:09,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311256851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:09,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:09,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:08:09,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281729967] [2021-06-05 14:08:09,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:08:09,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:09,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:08:09,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:09,142 INFO L87 Difference]: Start difference. First operand 2462 states and 8351 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:09,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:09,206 INFO L93 Difference]: Finished difference Result 2808 states and 8897 transitions. [2021-06-05 14:08:09,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:08:09,206 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:09,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:09,210 INFO L225 Difference]: With dead ends: 2808 [2021-06-05 14:08:09,210 INFO L226 Difference]: Without dead ends: 2808 [2021-06-05 14:08:09,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=104, Invalid=136, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:09,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2021-06-05 14:08:09,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 2464. [2021-06-05 14:08:09,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 3.39301664636622) internal successors, (8357), 2463 states have internal predecessors, (8357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:09,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 8357 transitions. [2021-06-05 14:08:09,245 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 8357 transitions. Word has length 22 [2021-06-05 14:08:09,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:09,245 INFO L482 AbstractCegarLoop]: Abstraction has 2464 states and 8357 transitions. [2021-06-05 14:08:09,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:09,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 8357 transitions. [2021-06-05 14:08:09,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:09,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:09,248 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:09,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21467 [2021-06-05 14:08:09,449 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:09,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:09,449 INFO L82 PathProgramCache]: Analyzing trace with hash -244100519, now seen corresponding path program 102 times [2021-06-05 14:08:09,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:09,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183603536] [2021-06-05 14:08:09,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:09,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:09,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183603536] [2021-06-05 14:08:09,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183603536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:09,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655367965] [2021-06-05 14:08:09,524 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 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 14:08:09,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:08:09,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:09,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:09,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:09,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655367965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:09,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:09,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:08:09,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416587659] [2021-06-05 14:08:09,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:09,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:09,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:09,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:09,603 INFO L87 Difference]: Start difference. First operand 2464 states and 8357 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:09,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:09,801 INFO L93 Difference]: Finished difference Result 2648 states and 8618 transitions. [2021-06-05 14:08:09,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:08:09,801 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:09,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:09,805 INFO L225 Difference]: With dead ends: 2648 [2021-06-05 14:08:09,805 INFO L226 Difference]: Without dead ends: 2646 [2021-06-05 14:08:09,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:09,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-06-05 14:08:09,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2464. [2021-06-05 14:08:09,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 3.3909866017052375) internal successors, (8352), 2463 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:09,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 8352 transitions. [2021-06-05 14:08:09,837 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 8352 transitions. Word has length 22 [2021-06-05 14:08:09,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:09,838 INFO L482 AbstractCegarLoop]: Abstraction has 2464 states and 8352 transitions. [2021-06-05 14:08:09,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:09,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 8352 transitions. [2021-06-05 14:08:09,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:09,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:09,840 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:10,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21468 [2021-06-05 14:08:10,053 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:10,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:10,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1533624868, now seen corresponding path program 103 times [2021-06-05 14:08:10,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:10,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260195114] [2021-06-05 14:08:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:10,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:10,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260195114] [2021-06-05 14:08:10,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260195114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:10,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259300480] [2021-06-05 14:08:10,164 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 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 14:08:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:10,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:10,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:10,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259300480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:10,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:10,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:08:10,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526299383] [2021-06-05 14:08:10,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:10,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:10,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:10,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:10,361 INFO L87 Difference]: Start difference. First operand 2464 states and 8352 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:10,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:10,443 INFO L93 Difference]: Finished difference Result 2940 states and 9196 transitions. [2021-06-05 14:08:10,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:08:10,443 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:10,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:10,448 INFO L225 Difference]: With dead ends: 2940 [2021-06-05 14:08:10,448 INFO L226 Difference]: Without dead ends: 2940 [2021-06-05 14:08:10,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 184.2ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:08:10,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-06-05 14:08:10,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2381. [2021-06-05 14:08:10,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 3.376890756302521) internal successors, (8037), 2380 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:10,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 8037 transitions. [2021-06-05 14:08:10,485 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 8037 transitions. Word has length 22 [2021-06-05 14:08:10,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:10,485 INFO L482 AbstractCegarLoop]: Abstraction has 2381 states and 8037 transitions. [2021-06-05 14:08:10,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:10,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 8037 transitions. [2021-06-05 14:08:10,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:10,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:10,488 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:10,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21469 [2021-06-05 14:08:10,705 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:10,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:10,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1245304477, now seen corresponding path program 104 times [2021-06-05 14:08:10,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:10,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019771954] [2021-06-05 14:08:10,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:10,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:10,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019771954] [2021-06-05 14:08:10,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019771954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:10,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414786765] [2021-06-05 14:08:10,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:08:10,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:10,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:10,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:10,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:10,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414786765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:10,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:10,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:08:10,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982570360] [2021-06-05 14:08:10,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:10,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:10,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:10,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:10,869 INFO L87 Difference]: Start difference. First operand 2381 states and 8037 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:11,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:11,060 INFO L93 Difference]: Finished difference Result 2660 states and 8730 transitions. [2021-06-05 14:08:11,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:08:11,060 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:11,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:11,063 INFO L225 Difference]: With dead ends: 2660 [2021-06-05 14:08:11,064 INFO L226 Difference]: Without dead ends: 2657 [2021-06-05 14:08:11,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 179.2ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:11,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-06-05 14:08:11,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2387. [2021-06-05 14:08:11,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 3.377200335289187) internal successors, (8058), 2386 states have internal predecessors, (8058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 8058 transitions. [2021-06-05 14:08:11,096 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 8058 transitions. Word has length 22 [2021-06-05 14:08:11,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:11,096 INFO L482 AbstractCegarLoop]: Abstraction has 2387 states and 8058 transitions. [2021-06-05 14:08:11,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:11,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 8058 transitions. [2021-06-05 14:08:11,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:11,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:11,098 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:11,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21470,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:11,314 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:11,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:11,314 INFO L82 PathProgramCache]: Analyzing trace with hash -527234934, now seen corresponding path program 105 times [2021-06-05 14:08:11,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:11,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652036898] [2021-06-05 14:08:11,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:11,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:11,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652036898] [2021-06-05 14:08:11,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652036898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:11,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632076935] [2021-06-05 14:08:11,384 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 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 14:08:11,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:08:11,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:11,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:11,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:11,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632076935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:11,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:11,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:08:11,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745025888] [2021-06-05 14:08:11,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:11,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:11,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:11,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:11,474 INFO L87 Difference]: Start difference. First operand 2387 states and 8058 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:11,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:11,565 INFO L93 Difference]: Finished difference Result 4123 states and 13618 transitions. [2021-06-05 14:08:11,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:08:11,569 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:11,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:11,575 INFO L225 Difference]: With dead ends: 4123 [2021-06-05 14:08:11,575 INFO L226 Difference]: Without dead ends: 4123 [2021-06-05 14:08:11,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:08:11,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-06-05 14:08:11,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3555. [2021-06-05 14:08:11,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3555 states, 3554 states have (on average 3.51435002813731) internal successors, (12490), 3554 states have internal predecessors, (12490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:11,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 12490 transitions. [2021-06-05 14:08:11,663 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 12490 transitions. Word has length 22 [2021-06-05 14:08:11,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:11,663 INFO L482 AbstractCegarLoop]: Abstraction has 3555 states and 12490 transitions. [2021-06-05 14:08:11,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:11,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 12490 transitions. [2021-06-05 14:08:11,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:11,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:11,667 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:11,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21471,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:11,883 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:11,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:11,884 INFO L82 PathProgramCache]: Analyzing trace with hash 172219097, now seen corresponding path program 106 times [2021-06-05 14:08:11,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:11,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234721895] [2021-06-05 14:08:11,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:11,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:11,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234721895] [2021-06-05 14:08:11,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234721895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:11,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679860103] [2021-06-05 14:08:11,979 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 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 14:08:12,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:12,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:12,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:12,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:12,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679860103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:12,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:12,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:08:12,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383154748] [2021-06-05 14:08:12,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:12,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:12,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:12,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:12,161 INFO L87 Difference]: Start difference. First operand 3555 states and 12490 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:12,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:12,327 INFO L93 Difference]: Finished difference Result 3810 states and 13136 transitions. [2021-06-05 14:08:12,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:08:12,328 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:12,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:12,333 INFO L225 Difference]: With dead ends: 3810 [2021-06-05 14:08:12,333 INFO L226 Difference]: Without dead ends: 3806 [2021-06-05 14:08:12,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:12,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-06-05 14:08:12,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3556. [2021-06-05 14:08:12,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 3.5130801687763715) internal successors, (12489), 3555 states have internal predecessors, (12489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 12489 transitions. [2021-06-05 14:08:12,387 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 12489 transitions. Word has length 22 [2021-06-05 14:08:12,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:12,387 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 12489 transitions. [2021-06-05 14:08:12,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:12,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 12489 transitions. [2021-06-05 14:08:12,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:12,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:12,390 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:12,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21472,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:12,591 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:12,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:12,591 INFO L82 PathProgramCache]: Analyzing trace with hash 10620644, now seen corresponding path program 107 times [2021-06-05 14:08:12,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:12,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950419416] [2021-06-05 14:08:12,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:12,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:12,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950419416] [2021-06-05 14:08:12,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950419416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:12,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756733372] [2021-06-05 14:08:12,671 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 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 14:08:12,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:08:12,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:12,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:12,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:12,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756733372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:12,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:12,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:08:12,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854521270] [2021-06-05 14:08:12,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:12,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:12,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:12,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:12,743 INFO L87 Difference]: Start difference. First operand 3556 states and 12489 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:12,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:12,892 INFO L93 Difference]: Finished difference Result 5567 states and 18927 transitions. [2021-06-05 14:08:12,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:08:12,893 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:12,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:12,901 INFO L225 Difference]: With dead ends: 5567 [2021-06-05 14:08:12,901 INFO L226 Difference]: Without dead ends: 5567 [2021-06-05 14:08:12,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:08:12,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5567 states. [2021-06-05 14:08:13,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5567 to 4818. [2021-06-05 14:08:13,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4818 states, 4817 states have (on average 3.5931077434087606) internal successors, (17308), 4817 states have internal predecessors, (17308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:13,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4818 states to 4818 states and 17308 transitions. [2021-06-05 14:08:13,026 INFO L78 Accepts]: Start accepts. Automaton has 4818 states and 17308 transitions. Word has length 22 [2021-06-05 14:08:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:13,026 INFO L482 AbstractCegarLoop]: Abstraction has 4818 states and 17308 transitions. [2021-06-05 14:08:13,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:13,026 INFO L276 IsEmpty]: Start isEmpty. Operand 4818 states and 17308 transitions. [2021-06-05 14:08:13,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:13,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:13,030 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:13,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21473,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:13,231 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:13,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:13,231 INFO L82 PathProgramCache]: Analyzing trace with hash 815838919, now seen corresponding path program 108 times [2021-06-05 14:08:13,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:13,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459042762] [2021-06-05 14:08:13,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:13,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:13,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459042762] [2021-06-05 14:08:13,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459042762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:13,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215747973] [2021-06-05 14:08:13,299 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 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 14:08:13,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 14:08:13,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:13,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:13,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:13,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215747973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:13,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:13,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:08:13,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830674244] [2021-06-05 14:08:13,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:08:13,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:13,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:08:13,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:13,407 INFO L87 Difference]: Start difference. First operand 4818 states and 17308 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:13,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:13,526 INFO L93 Difference]: Finished difference Result 5072 states and 17481 transitions. [2021-06-05 14:08:13,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:08:13,527 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:13,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:13,535 INFO L225 Difference]: With dead ends: 5072 [2021-06-05 14:08:13,535 INFO L226 Difference]: Without dead ends: 5072 [2021-06-05 14:08:13,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:08:13,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5072 states. [2021-06-05 14:08:13,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5072 to 4661. [2021-06-05 14:08:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4660 states have (on average 3.5489270386266094) internal successors, (16538), 4660 states have internal predecessors, (16538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:13,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 16538 transitions. [2021-06-05 14:08:13,616 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 16538 transitions. Word has length 22 [2021-06-05 14:08:13,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:13,616 INFO L482 AbstractCegarLoop]: Abstraction has 4661 states and 16538 transitions. [2021-06-05 14:08:13,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:13,616 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 16538 transitions. [2021-06-05 14:08:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:13,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:13,620 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:13,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21474 [2021-06-05 14:08:13,821 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:13,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:13,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1899129052, now seen corresponding path program 109 times [2021-06-05 14:08:13,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:13,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059450623] [2021-06-05 14:08:13,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:14,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:14,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059450623] [2021-06-05 14:08:14,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059450623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:14,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625038916] [2021-06-05 14:08:14,242 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 14:08:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:14,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:14,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:14,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625038916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:14,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:14,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:08:14,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332306181] [2021-06-05 14:08:14,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:08:14,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:14,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:08:14,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:14,303 INFO L87 Difference]: Start difference. First operand 4661 states and 16538 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:14,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:14,467 INFO L93 Difference]: Finished difference Result 5066 states and 17441 transitions. [2021-06-05 14:08:14,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:08:14,467 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:14,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:14,476 INFO L225 Difference]: With dead ends: 5066 [2021-06-05 14:08:14,476 INFO L226 Difference]: Without dead ends: 5064 [2021-06-05 14:08:14,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:08:14,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2021-06-05 14:08:14,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 4803. [2021-06-05 14:08:14,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 3.546022490628905) internal successors, (17028), 4802 states have internal predecessors, (17028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:14,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 17028 transitions. [2021-06-05 14:08:14,581 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 17028 transitions. Word has length 22 [2021-06-05 14:08:14,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:14,582 INFO L482 AbstractCegarLoop]: Abstraction has 4803 states and 17028 transitions. [2021-06-05 14:08:14,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:14,582 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 17028 transitions. [2021-06-05 14:08:14,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:14,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:14,587 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:14,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21475,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:14,804 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:14,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:14,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1739036067, now seen corresponding path program 110 times [2021-06-05 14:08:14,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:14,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364731045] [2021-06-05 14:08:14,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:14,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:14,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364731045] [2021-06-05 14:08:14,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364731045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:14,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430364686] [2021-06-05 14:08:14,868 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 14:08:14,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:14,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:14,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:14,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:14,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430364686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:14,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:14,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:08:14,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169025719] [2021-06-05 14:08:14,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:08:14,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:14,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:08:14,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:14,938 INFO L87 Difference]: Start difference. First operand 4803 states and 17028 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:15,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:15,107 INFO L93 Difference]: Finished difference Result 5001 states and 17312 transitions. [2021-06-05 14:08:15,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:08:15,108 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:15,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:15,115 INFO L225 Difference]: With dead ends: 5001 [2021-06-05 14:08:15,115 INFO L226 Difference]: Without dead ends: 4999 [2021-06-05 14:08:15,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:08:15,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4999 states. [2021-06-05 14:08:15,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4999 to 4791. [2021-06-05 14:08:15,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4791 states, 4790 states have (on average 3.5361169102296452) internal successors, (16938), 4790 states have internal predecessors, (16938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:15,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4791 states to 4791 states and 16938 transitions. [2021-06-05 14:08:15,197 INFO L78 Accepts]: Start accepts. Automaton has 4791 states and 16938 transitions. Word has length 22 [2021-06-05 14:08:15,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:15,197 INFO L482 AbstractCegarLoop]: Abstraction has 4791 states and 16938 transitions. [2021-06-05 14:08:15,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:15,197 INFO L276 IsEmpty]: Start isEmpty. Operand 4791 states and 16938 transitions. [2021-06-05 14:08:15,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:15,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:15,217 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:15,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21476 [2021-06-05 14:08:15,433 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:15,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:15,433 INFO L82 PathProgramCache]: Analyzing trace with hash -816617334, now seen corresponding path program 111 times [2021-06-05 14:08:15,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:15,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511002330] [2021-06-05 14:08:15,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:15,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:15,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511002330] [2021-06-05 14:08:15,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511002330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:15,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334288694] [2021-06-05 14:08:15,493 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 14:08:15,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:08:15,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:15,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:15,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:15,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334288694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:15,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:15,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:08:15,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215902902] [2021-06-05 14:08:15,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:08:15,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:15,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:08:15,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:15,558 INFO L87 Difference]: Start difference. First operand 4791 states and 16938 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:15,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:15,734 INFO L93 Difference]: Finished difference Result 5161 states and 17507 transitions. [2021-06-05 14:08:15,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:08:15,734 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:15,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:15,741 INFO L225 Difference]: With dead ends: 5161 [2021-06-05 14:08:15,741 INFO L226 Difference]: Without dead ends: 5161 [2021-06-05 14:08:15,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=103, Invalid=137, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:15,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2021-06-05 14:08:15,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 4811. [2021-06-05 14:08:15,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4810 states have (on average 3.51995841995842) internal successors, (16931), 4810 states have internal predecessors, (16931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:15,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 16931 transitions. [2021-06-05 14:08:15,839 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 16931 transitions. Word has length 22 [2021-06-05 14:08:15,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:15,839 INFO L482 AbstractCegarLoop]: Abstraction has 4811 states and 16931 transitions. [2021-06-05 14:08:15,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:15,839 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 16931 transitions. [2021-06-05 14:08:15,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:15,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:15,843 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:16,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21477 [2021-06-05 14:08:16,043 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:16,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:16,043 INFO L82 PathProgramCache]: Analyzing trace with hash -28422759, now seen corresponding path program 112 times [2021-06-05 14:08:16,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:16,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712897732] [2021-06-05 14:08:16,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:16,121 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:16,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:16,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712897732] [2021-06-05 14:08:16,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712897732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:16,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723322375] [2021-06-05 14:08:16,121 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 14:08:16,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:16,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:16,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:16,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:16,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723322375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:16,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:16,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:08:16,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730376251] [2021-06-05 14:08:16,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:16,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:16,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:16,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:16,191 INFO L87 Difference]: Start difference. First operand 4811 states and 16931 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:16,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:16,368 INFO L93 Difference]: Finished difference Result 5011 states and 17220 transitions. [2021-06-05 14:08:16,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:08:16,369 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:16,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:16,376 INFO L225 Difference]: With dead ends: 5011 [2021-06-05 14:08:16,376 INFO L226 Difference]: Without dead ends: 5009 [2021-06-05 14:08:16,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=270, Invalid=486, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:16,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5009 states. [2021-06-05 14:08:16,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5009 to 4811. [2021-06-05 14:08:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4810 states have (on average 3.5185031185031184) internal successors, (16924), 4810 states have internal predecessors, (16924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:16,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 16924 transitions. [2021-06-05 14:08:16,452 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 16924 transitions. Word has length 22 [2021-06-05 14:08:16,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:16,452 INFO L482 AbstractCegarLoop]: Abstraction has 4811 states and 16924 transitions. [2021-06-05 14:08:16,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:16,452 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 16924 transitions. [2021-06-05 14:08:16,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:16,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:16,470 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:16,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21478 [2021-06-05 14:08:16,693 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:16,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:16,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1749302628, now seen corresponding path program 113 times [2021-06-05 14:08:16,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:16,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084048366] [2021-06-05 14:08:16,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:16,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:16,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084048366] [2021-06-05 14:08:16,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084048366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:16,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553135180] [2021-06-05 14:08:16,767 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 14:08:16,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:08:16,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:16,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:16,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:16,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553135180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:16,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:16,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:08:16,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264043307] [2021-06-05 14:08:16,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:16,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:16,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:16,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:16,844 INFO L87 Difference]: Start difference. First operand 4811 states and 16924 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:16,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:16,943 INFO L93 Difference]: Finished difference Result 5260 states and 17706 transitions. [2021-06-05 14:08:16,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:08:16,943 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:16,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:16,951 INFO L225 Difference]: With dead ends: 5260 [2021-06-05 14:08:16,952 INFO L226 Difference]: Without dead ends: 5260 [2021-06-05 14:08:16,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=137, Invalid=205, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:08:16,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5260 states. [2021-06-05 14:08:17,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5260 to 4668. [2021-06-05 14:08:17,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4668 states, 4667 states have (on average 3.503106920934219) internal successors, (16349), 4667 states have internal predecessors, (16349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:17,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4668 states to 4668 states and 16349 transitions. [2021-06-05 14:08:17,100 INFO L78 Accepts]: Start accepts. Automaton has 4668 states and 16349 transitions. Word has length 22 [2021-06-05 14:08:17,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:17,101 INFO L482 AbstractCegarLoop]: Abstraction has 4668 states and 16349 transitions. [2021-06-05 14:08:17,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:17,101 INFO L276 IsEmpty]: Start isEmpty. Operand 4668 states and 16349 transitions. [2021-06-05 14:08:17,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:17,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:17,104 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:17,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21479,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:17,321 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:17,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:17,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1460982237, now seen corresponding path program 114 times [2021-06-05 14:08:17,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:17,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326275396] [2021-06-05 14:08:17,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:17,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:17,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326275396] [2021-06-05 14:08:17,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326275396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:17,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414764334] [2021-06-05 14:08:17,393 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 14:08:17,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 14:08:17,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:17,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:17,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:17,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414764334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:17,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:17,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:08:17,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243246971] [2021-06-05 14:08:17,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:17,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:17,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:17,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:17,477 INFO L87 Difference]: Start difference. First operand 4668 states and 16349 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:17,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:17,638 INFO L93 Difference]: Finished difference Result 4999 states and 17165 transitions. [2021-06-05 14:08:17,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:08:17,638 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:17,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:17,646 INFO L225 Difference]: With dead ends: 4999 [2021-06-05 14:08:17,647 INFO L226 Difference]: Without dead ends: 4996 [2021-06-05 14:08:17,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:17,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4996 states. [2021-06-05 14:08:17,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4996 to 4674. [2021-06-05 14:08:17,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4674 states, 4673 states have (on average 3.503316927027605) internal successors, (16371), 4673 states have internal predecessors, (16371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 16371 transitions. [2021-06-05 14:08:17,730 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 16371 transitions. Word has length 22 [2021-06-05 14:08:17,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:17,730 INFO L482 AbstractCegarLoop]: Abstraction has 4674 states and 16371 transitions. [2021-06-05 14:08:17,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 16371 transitions. [2021-06-05 14:08:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:17,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:17,734 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:17,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21480 [2021-06-05 14:08:17,934 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:17,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:17,934 INFO L82 PathProgramCache]: Analyzing trace with hash -311557174, now seen corresponding path program 115 times [2021-06-05 14:08:17,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:17,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469647728] [2021-06-05 14:08:17,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:18,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:18,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469647728] [2021-06-05 14:08:18,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469647728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:18,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612344120] [2021-06-05 14:08:18,000 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 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 14:08:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:18,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:18,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:18,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612344120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:18,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:18,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:08:18,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230990863] [2021-06-05 14:08:18,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:18,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:18,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:18,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:18,084 INFO L87 Difference]: Start difference. First operand 4674 states and 16371 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:18,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:18,196 INFO L93 Difference]: Finished difference Result 8484 states and 29708 transitions. [2021-06-05 14:08:18,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:08:18,197 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:18,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:18,211 INFO L225 Difference]: With dead ends: 8484 [2021-06-05 14:08:18,211 INFO L226 Difference]: Without dead ends: 8484 [2021-06-05 14:08:18,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:08:18,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8484 states. [2021-06-05 14:08:18,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8484 to 7934. [2021-06-05 14:08:18,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 7933 states have (on average 3.6155300642884156) internal successors, (28682), 7933 states have internal predecessors, (28682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:18,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 28682 transitions. [2021-06-05 14:08:18,368 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 28682 transitions. Word has length 22 [2021-06-05 14:08:18,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:18,369 INFO L482 AbstractCegarLoop]: Abstraction has 7934 states and 28682 transitions. [2021-06-05 14:08:18,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:18,369 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 28682 transitions. [2021-06-05 14:08:18,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:18,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:18,398 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:18,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21481,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:18,614 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:18,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:18,615 INFO L82 PathProgramCache]: Analyzing trace with hash 387896857, now seen corresponding path program 116 times [2021-06-05 14:08:18,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:18,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792351143] [2021-06-05 14:08:18,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:18,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:18,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792351143] [2021-06-05 14:08:18,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792351143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:18,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944010915] [2021-06-05 14:08:18,697 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 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 14:08:18,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:18,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:18,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:18,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:18,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944010915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:18,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:18,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:08:18,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883918799] [2021-06-05 14:08:18,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:18,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:18,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:18,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:18,770 INFO L87 Difference]: Start difference. First operand 7934 states and 28682 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:18,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:18,953 INFO L93 Difference]: Finished difference Result 8250 states and 29464 transitions. [2021-06-05 14:08:18,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:08:18,953 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:18,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:18,966 INFO L225 Difference]: With dead ends: 8250 [2021-06-05 14:08:18,967 INFO L226 Difference]: Without dead ends: 8246 [2021-06-05 14:08:18,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=254, Invalid=502, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:18,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8246 states. [2021-06-05 14:08:19,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8246 to 7934. [2021-06-05 14:08:19,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 7933 states have (on average 3.615277952855162) internal successors, (28680), 7933 states have internal predecessors, (28680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:19,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 28680 transitions. [2021-06-05 14:08:19,097 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 28680 transitions. Word has length 22 [2021-06-05 14:08:19,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:19,097 INFO L482 AbstractCegarLoop]: Abstraction has 7934 states and 28680 transitions. [2021-06-05 14:08:19,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:19,097 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 28680 transitions. [2021-06-05 14:08:19,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:19,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:19,102 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:19,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21482,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:19,302 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:19,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:19,302 INFO L82 PathProgramCache]: Analyzing trace with hash 226298404, now seen corresponding path program 117 times [2021-06-05 14:08:19,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:19,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470258626] [2021-06-05 14:08:19,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:19,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:19,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470258626] [2021-06-05 14:08:19,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470258626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:19,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904214495] [2021-06-05 14:08:19,388 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 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 14:08:19,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:08:19,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:19,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:19,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:19,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904214495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:19,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:19,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:08:19,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384363947] [2021-06-05 14:08:19,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:19,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:19,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:19,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:19,464 INFO L87 Difference]: Start difference. First operand 7934 states and 28680 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:19,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:19,634 INFO L93 Difference]: Finished difference Result 11106 states and 39649 transitions. [2021-06-05 14:08:19,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:08:19,635 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:19,655 INFO L225 Difference]: With dead ends: 11106 [2021-06-05 14:08:19,656 INFO L226 Difference]: Without dead ends: 11106 [2021-06-05 14:08:19,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:08:19,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11106 states. [2021-06-05 14:08:19,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11106 to 10570. [2021-06-05 14:08:19,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10570 states, 10569 states have (on average 3.65701580092724) internal successors, (38651), 10569 states have internal predecessors, (38651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:19,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10570 states to 10570 states and 38651 transitions. [2021-06-05 14:08:19,870 INFO L78 Accepts]: Start accepts. Automaton has 10570 states and 38651 transitions. Word has length 22 [2021-06-05 14:08:19,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:19,870 INFO L482 AbstractCegarLoop]: Abstraction has 10570 states and 38651 transitions. [2021-06-05 14:08:19,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:19,871 INFO L276 IsEmpty]: Start isEmpty. Operand 10570 states and 38651 transitions. [2021-06-05 14:08:19,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:19,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:19,876 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:20,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21483 [2021-06-05 14:08:20,076 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:20,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:20,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1481988445, now seen corresponding path program 118 times [2021-06-05 14:08:20,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:20,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101995142] [2021-06-05 14:08:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:20,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:20,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101995142] [2021-06-05 14:08:20,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101995142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:20,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128418742] [2021-06-05 14:08:20,153 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 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 14:08:20,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:20,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:20,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:20,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:20,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128418742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:20,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:20,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:08:20,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355937224] [2021-06-05 14:08:20,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:20,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:20,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:20,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:20,219 INFO L87 Difference]: Start difference. First operand 10570 states and 38651 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:20,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:20,460 INFO L93 Difference]: Finished difference Result 10860 states and 39397 transitions. [2021-06-05 14:08:20,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:08:20,461 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:20,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:20,480 INFO L225 Difference]: With dead ends: 10860 [2021-06-05 14:08:20,480 INFO L226 Difference]: Without dead ends: 10855 [2021-06-05 14:08:20,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 185.1ms TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:20,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10855 states. [2021-06-05 14:08:20,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10855 to 10571. [2021-06-05 14:08:20,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10570 states have (on average 3.656669820245979) internal successors, (38651), 10570 states have internal predecessors, (38651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:20,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 38651 transitions. [2021-06-05 14:08:20,651 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 38651 transitions. Word has length 22 [2021-06-05 14:08:20,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:20,652 INFO L482 AbstractCegarLoop]: Abstraction has 10571 states and 38651 transitions. [2021-06-05 14:08:20,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:20,652 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 38651 transitions. [2021-06-05 14:08:20,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:20,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:20,657 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:20,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21484 [2021-06-05 14:08:20,873 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:20,873 INFO L82 PathProgramCache]: Analyzing trace with hash -280047862, now seen corresponding path program 119 times [2021-06-05 14:08:20,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:20,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764097659] [2021-06-05 14:08:20,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:20,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:20,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764097659] [2021-06-05 14:08:20,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764097659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:20,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124540316] [2021-06-05 14:08:20,939 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 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 14:08:20,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:08:20,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:20,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:20,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:21,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124540316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:21,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:21,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:08:21,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737034074] [2021-06-05 14:08:21,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:21,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:21,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:21,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:21,008 INFO L87 Difference]: Start difference. First operand 10571 states and 38651 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:21,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:21,262 INFO L93 Difference]: Finished difference Result 13741 states and 49418 transitions. [2021-06-05 14:08:21,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:08:21,262 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:21,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:21,289 INFO L225 Difference]: With dead ends: 13741 [2021-06-05 14:08:21,289 INFO L226 Difference]: Without dead ends: 13741 [2021-06-05 14:08:21,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 183.2ms TimeCoverageRelationStatistics Valid=329, Invalid=601, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:08:21,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13741 states. [2021-06-05 14:08:21,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13741 to 12995. [2021-06-05 14:08:21,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12995 states, 12994 states have (on average 3.6815453286132063) internal successors, (47838), 12994 states have internal predecessors, (47838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:21,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12995 states to 12995 states and 47838 transitions. [2021-06-05 14:08:21,759 INFO L78 Accepts]: Start accepts. Automaton has 12995 states and 47838 transitions. Word has length 22 [2021-06-05 14:08:21,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:21,759 INFO L482 AbstractCegarLoop]: Abstraction has 12995 states and 47838 transitions. [2021-06-05 14:08:21,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:21,759 INFO L276 IsEmpty]: Start isEmpty. Operand 12995 states and 47838 transitions. [2021-06-05 14:08:21,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:21,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:21,765 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:21,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21485,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:21,982 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:21,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:21,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1088085113, now seen corresponding path program 120 times [2021-06-05 14:08:21,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:21,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819862821] [2021-06-05 14:08:21,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:22,077 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:22,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:22,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819862821] [2021-06-05 14:08:22,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819862821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:22,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603065302] [2021-06-05 14:08:22,078 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 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 14:08:22,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:08:22,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:22,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:22,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:22,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603065302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:22,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:22,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:08:22,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011871771] [2021-06-05 14:08:22,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:08:22,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:22,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:08:22,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:22,145 INFO L87 Difference]: Start difference. First operand 12995 states and 47838 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:22,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:22,280 INFO L93 Difference]: Finished difference Result 13222 states and 47729 transitions. [2021-06-05 14:08:22,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:08:22,281 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:22,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:22,309 INFO L225 Difference]: With dead ends: 13222 [2021-06-05 14:08:22,309 INFO L226 Difference]: Without dead ends: 13222 [2021-06-05 14:08:22,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:08:22,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13222 states. [2021-06-05 14:08:22,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13222 to 12777. [2021-06-05 14:08:22,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12777 states, 12776 states have (on average 3.6486380713838447) internal successors, (46615), 12776 states have internal predecessors, (46615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:22,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12777 states to 12777 states and 46615 transitions. [2021-06-05 14:08:22,539 INFO L78 Accepts]: Start accepts. Automaton has 12777 states and 46615 transitions. Word has length 22 [2021-06-05 14:08:22,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:22,539 INFO L482 AbstractCegarLoop]: Abstraction has 12777 states and 46615 transitions. [2021-06-05 14:08:22,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:22,539 INFO L276 IsEmpty]: Start isEmpty. Operand 12777 states and 46615 transitions. [2021-06-05 14:08:22,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:22,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:22,544 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:22,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21486 [2021-06-05 14:08:22,745 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:22,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:22,745 INFO L82 PathProgramCache]: Analyzing trace with hash -4794980, now seen corresponding path program 121 times [2021-06-05 14:08:22,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:22,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754032918] [2021-06-05 14:08:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:22,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:22,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754032918] [2021-06-05 14:08:22,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754032918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:22,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226514297] [2021-06-05 14:08:22,808 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 14:08:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:22,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:22,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:22,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226514297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:22,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:22,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:08:22,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096480576] [2021-06-05 14:08:22,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:08:22,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:22,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:08:22,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:22,871 INFO L87 Difference]: Start difference. First operand 12777 states and 46615 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:23,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:23,066 INFO L93 Difference]: Finished difference Result 13713 states and 49513 transitions. [2021-06-05 14:08:23,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:08:23,067 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:23,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:23,095 INFO L225 Difference]: With dead ends: 13713 [2021-06-05 14:08:23,096 INFO L226 Difference]: Without dead ends: 13711 [2021-06-05 14:08:23,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:08:23,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13711 states. [2021-06-05 14:08:23,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13711 to 13456. [2021-06-05 14:08:23,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13456 states, 13455 states have (on average 3.6375325157933855) internal successors, (48943), 13455 states have internal predecessors, (48943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:23,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13456 states to 13456 states and 48943 transitions. [2021-06-05 14:08:23,355 INFO L78 Accepts]: Start accepts. Automaton has 13456 states and 48943 transitions. Word has length 22 [2021-06-05 14:08:23,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:23,355 INFO L482 AbstractCegarLoop]: Abstraction has 13456 states and 48943 transitions. [2021-06-05 14:08:23,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:23,355 INFO L276 IsEmpty]: Start isEmpty. Operand 13456 states and 48943 transitions. [2021-06-05 14:08:23,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:23,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:23,361 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:23,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21487,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:23,577 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:23,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:23,577 INFO L82 PathProgramCache]: Analyzing trace with hash 652007197, now seen corresponding path program 122 times [2021-06-05 14:08:23,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:23,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816765447] [2021-06-05 14:08:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:23,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:23,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816765447] [2021-06-05 14:08:23,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816765447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:23,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50927932] [2021-06-05 14:08:23,636 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 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 14:08:23,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:23,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:23,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:23,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:23,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50927932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:23,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:23,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:08:23,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170877224] [2021-06-05 14:08:23,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:08:23,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:23,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:08:23,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:23,711 INFO L87 Difference]: Start difference. First operand 13456 states and 48943 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:23,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:23,905 INFO L93 Difference]: Finished difference Result 13655 states and 49230 transitions. [2021-06-05 14:08:23,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:08:23,905 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:23,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:23,934 INFO L225 Difference]: With dead ends: 13655 [2021-06-05 14:08:23,935 INFO L226 Difference]: Without dead ends: 13653 [2021-06-05 14:08:23,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:08:23,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13653 states. [2021-06-05 14:08:24,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13653 to 13436. [2021-06-05 14:08:24,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13436 states, 13435 states have (on average 3.621734276144399) internal successors, (48658), 13435 states have internal predecessors, (48658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:24,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13436 states to 13436 states and 48658 transitions. [2021-06-05 14:08:24,196 INFO L78 Accepts]: Start accepts. Automaton has 13436 states and 48658 transitions. Word has length 22 [2021-06-05 14:08:24,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:24,196 INFO L482 AbstractCegarLoop]: Abstraction has 13436 states and 48658 transitions. [2021-06-05 14:08:24,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:24,196 INFO L276 IsEmpty]: Start isEmpty. Operand 13436 states and 48658 transitions. [2021-06-05 14:08:24,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:24,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:24,203 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:24,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21488 [2021-06-05 14:08:24,420 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:24,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:24,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1574425930, now seen corresponding path program 123 times [2021-06-05 14:08:24,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:24,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142760162] [2021-06-05 14:08:24,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:24,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:24,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142760162] [2021-06-05 14:08:24,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142760162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:24,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564601948] [2021-06-05 14:08:24,499 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 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 14:08:24,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:08:24,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:24,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:24,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:24,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564601948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:24,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:24,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:08:24,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961393415] [2021-06-05 14:08:24,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:08:24,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:24,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:08:24,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:24,626 INFO L87 Difference]: Start difference. First operand 13436 states and 48658 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:24,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:24,744 INFO L93 Difference]: Finished difference Result 13677 states and 48611 transitions. [2021-06-05 14:08:24,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:08:24,745 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:24,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:24,775 INFO L225 Difference]: With dead ends: 13677 [2021-06-05 14:08:24,775 INFO L226 Difference]: Without dead ends: 13677 [2021-06-05 14:08:24,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:24,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13677 states. [2021-06-05 14:08:24,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13677 to 13135. [2021-06-05 14:08:24,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13135 states, 13134 states have (on average 3.607887924470839) internal successors, (47386), 13134 states have internal predecessors, (47386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:25,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13135 states to 13135 states and 47386 transitions. [2021-06-05 14:08:25,030 INFO L78 Accepts]: Start accepts. Automaton has 13135 states and 47386 transitions. Word has length 22 [2021-06-05 14:08:25,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:25,030 INFO L482 AbstractCegarLoop]: Abstraction has 13135 states and 47386 transitions. [2021-06-05 14:08:25,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:25,030 INFO L276 IsEmpty]: Start isEmpty. Operand 13135 states and 47386 transitions. [2021-06-05 14:08:25,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:25,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:25,036 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:25,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21489 [2021-06-05 14:08:25,253 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:25,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:25,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1932346791, now seen corresponding path program 124 times [2021-06-05 14:08:25,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:25,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29802094] [2021-06-05 14:08:25,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:25,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:25,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29802094] [2021-06-05 14:08:25,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29802094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:25,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827145950] [2021-06-05 14:08:25,345 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 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 14:08:25,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:25,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:25,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:25,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:25,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827145950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:25,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:25,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:08:25,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077218612] [2021-06-05 14:08:25,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:25,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:25,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:25,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:25,419 INFO L87 Difference]: Start difference. First operand 13135 states and 47386 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:25,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:25,624 INFO L93 Difference]: Finished difference Result 13337 states and 47678 transitions. [2021-06-05 14:08:25,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:08:25,625 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:25,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:25,652 INFO L225 Difference]: With dead ends: 13337 [2021-06-05 14:08:25,652 INFO L226 Difference]: Without dead ends: 13335 [2021-06-05 14:08:25,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=271, Invalid=485, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:25,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13335 states. [2021-06-05 14:08:25,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13335 to 13135. [2021-06-05 14:08:25,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13135 states, 13134 states have (on average 3.607202680067002) internal successors, (47377), 13134 states have internal predecessors, (47377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:25,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13135 states to 13135 states and 47377 transitions. [2021-06-05 14:08:25,985 INFO L78 Accepts]: Start accepts. Automaton has 13135 states and 47377 transitions. Word has length 22 [2021-06-05 14:08:25,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:25,985 INFO L482 AbstractCegarLoop]: Abstraction has 13135 states and 47377 transitions. [2021-06-05 14:08:25,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:25,985 INFO L276 IsEmpty]: Start isEmpty. Operand 13135 states and 47377 transitions. [2021-06-05 14:08:25,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:25,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:25,991 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:26,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21490,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:26,201 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:26,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:26,201 INFO L82 PathProgramCache]: Analyzing trace with hash -154621404, now seen corresponding path program 125 times [2021-06-05 14:08:26,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:26,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358450100] [2021-06-05 14:08:26,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:26,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:26,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358450100] [2021-06-05 14:08:26,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358450100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:26,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889609287] [2021-06-05 14:08:26,266 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 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 14:08:26,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:08:26,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:26,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:26,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:26,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889609287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:26,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:26,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:08:26,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867049666] [2021-06-05 14:08:26,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:26,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:26,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:26,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:26,361 INFO L87 Difference]: Start difference. First operand 13135 states and 47377 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:26,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:26,505 INFO L93 Difference]: Finished difference Result 14025 states and 49447 transitions. [2021-06-05 14:08:26,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:08:26,506 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:26,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:26,536 INFO L225 Difference]: With dead ends: 14025 [2021-06-05 14:08:26,536 INFO L226 Difference]: Without dead ends: 14025 [2021-06-05 14:08:26,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:08:26,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14025 states. [2021-06-05 14:08:26,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14025 to 12987. [2021-06-05 14:08:26,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12987 states, 12986 states have (on average 3.587170799322347) internal successors, (46583), 12986 states have internal predecessors, (46583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:26,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12987 states to 12987 states and 46583 transitions. [2021-06-05 14:08:26,799 INFO L78 Accepts]: Start accepts. Automaton has 12987 states and 46583 transitions. Word has length 22 [2021-06-05 14:08:26,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:26,799 INFO L482 AbstractCegarLoop]: Abstraction has 12987 states and 46583 transitions. [2021-06-05 14:08:26,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:26,799 INFO L276 IsEmpty]: Start isEmpty. Operand 12987 states and 46583 transitions. [2021-06-05 14:08:26,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:26,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:26,805 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:27,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21491,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:27,021 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:27,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:27,021 INFO L82 PathProgramCache]: Analyzing trace with hash -442941795, now seen corresponding path program 126 times [2021-06-05 14:08:27,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:27,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606993433] [2021-06-05 14:08:27,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:27,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:27,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606993433] [2021-06-05 14:08:27,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606993433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:27,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080908281] [2021-06-05 14:08:27,096 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 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 14:08:27,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:08:27,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:27,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:27,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:27,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080908281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:27,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:27,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:08:27,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495370209] [2021-06-05 14:08:27,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:27,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:27,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:27,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:27,164 INFO L87 Difference]: Start difference. First operand 12987 states and 46583 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:27,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:27,374 INFO L93 Difference]: Finished difference Result 13344 states and 47452 transitions. [2021-06-05 14:08:27,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:08:27,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:27,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:27,404 INFO L225 Difference]: With dead ends: 13344 [2021-06-05 14:08:27,405 INFO L226 Difference]: Without dead ends: 13341 [2021-06-05 14:08:27,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:27,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13341 states. [2021-06-05 14:08:27,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13341 to 12991. [2021-06-05 14:08:27,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12991 states, 12990 states have (on average 3.5871439568899155) internal successors, (46597), 12990 states have internal predecessors, (46597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:27,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12991 states to 12991 states and 46597 transitions. [2021-06-05 14:08:27,656 INFO L78 Accepts]: Start accepts. Automaton has 12991 states and 46597 transitions. Word has length 22 [2021-06-05 14:08:27,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:27,656 INFO L482 AbstractCegarLoop]: Abstraction has 12991 states and 46597 transitions. [2021-06-05 14:08:27,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:27,656 INFO L276 IsEmpty]: Start isEmpty. Operand 12991 states and 46597 transitions. [2021-06-05 14:08:27,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:27,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:27,662 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:27,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21492 [2021-06-05 14:08:27,875 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:27,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:27,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2079486090, now seen corresponding path program 127 times [2021-06-05 14:08:27,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:27,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242955337] [2021-06-05 14:08:27,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:27,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:27,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242955337] [2021-06-05 14:08:27,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242955337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:27,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981301] [2021-06-05 14:08:27,936 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 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 14:08:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:27,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:27,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:28,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:28,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:28,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:08:28,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865639248] [2021-06-05 14:08:28,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:28,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:28,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:28,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:28,007 INFO L87 Difference]: Start difference. First operand 12991 states and 46597 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:28,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:28,180 INFO L93 Difference]: Finished difference Result 23387 states and 84578 transitions. [2021-06-05 14:08:28,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:08:28,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:28,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:28,239 INFO L225 Difference]: With dead ends: 23387 [2021-06-05 14:08:28,239 INFO L226 Difference]: Without dead ends: 23387 [2021-06-05 14:08:28,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:08:28,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23387 states. [2021-06-05 14:08:28,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23387 to 22894. [2021-06-05 14:08:28,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22894 states, 22893 states have (on average 3.6538679945834973) internal successors, (83648), 22893 states have internal predecessors, (83648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:28,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22894 states to 22894 states and 83648 transitions. [2021-06-05 14:08:28,746 INFO L78 Accepts]: Start accepts. Automaton has 22894 states and 83648 transitions. Word has length 22 [2021-06-05 14:08:28,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:28,746 INFO L482 AbstractCegarLoop]: Abstraction has 22894 states and 83648 transitions. [2021-06-05 14:08:28,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:28,746 INFO L276 IsEmpty]: Start isEmpty. Operand 22894 states and 83648 transitions. [2021-06-05 14:08:28,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:28,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:28,752 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:28,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21493 [2021-06-05 14:08:28,968 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:28,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:28,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1516027175, now seen corresponding path program 128 times [2021-06-05 14:08:28,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:28,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002558280] [2021-06-05 14:08:28,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:29,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:29,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002558280] [2021-06-05 14:08:29,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002558280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:29,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300254598] [2021-06-05 14:08:29,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:08:29,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:29,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:29,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:29,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:29,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300254598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:29,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:29,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:08:29,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569418069] [2021-06-05 14:08:29,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:29,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:29,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:29,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:29,122 INFO L87 Difference]: Start difference. First operand 22894 states and 83648 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:29,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:29,402 INFO L93 Difference]: Finished difference Result 23234 states and 84479 transitions. [2021-06-05 14:08:29,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:08:29,403 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:29,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:29,452 INFO L225 Difference]: With dead ends: 23234 [2021-06-05 14:08:29,452 INFO L226 Difference]: Without dead ends: 23230 [2021-06-05 14:08:29,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:29,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23230 states. [2021-06-05 14:08:29,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23230 to 22894. [2021-06-05 14:08:30,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22894 states, 22893 states have (on average 3.6538243131088106) internal successors, (83647), 22893 states have internal predecessors, (83647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:30,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22894 states to 22894 states and 83647 transitions. [2021-06-05 14:08:30,093 INFO L78 Accepts]: Start accepts. Automaton has 22894 states and 83647 transitions. Word has length 22 [2021-06-05 14:08:30,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:30,093 INFO L482 AbstractCegarLoop]: Abstraction has 22894 states and 83647 transitions. [2021-06-05 14:08:30,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:30,093 INFO L276 IsEmpty]: Start isEmpty. Operand 22894 states and 83647 transitions. [2021-06-05 14:08:30,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:30,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:30,099 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:30,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21494,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:30,315 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:30,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:30,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1677625628, now seen corresponding path program 129 times [2021-06-05 14:08:30,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:30,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699386463] [2021-06-05 14:08:30,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:30,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:30,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699386463] [2021-06-05 14:08:30,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699386463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:30,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307276105] [2021-06-05 14:08:30,421 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 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 14:08:30,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:08:30,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:30,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:30,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:30,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307276105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:30,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:30,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:08:30,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310618486] [2021-06-05 14:08:30,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:30,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:30,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:30,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:30,484 INFO L87 Difference]: Start difference. First operand 22894 states and 83647 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:30,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:30,716 INFO L93 Difference]: Finished difference Result 28918 states and 105542 transitions. [2021-06-05 14:08:30,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:08:30,717 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:30,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:30,794 INFO L225 Difference]: With dead ends: 28918 [2021-06-05 14:08:30,794 INFO L226 Difference]: Without dead ends: 28918 [2021-06-05 14:08:30,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:08:30,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28918 states. [2021-06-05 14:08:31,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28918 to 28548. [2021-06-05 14:08:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28548 states, 28547 states have (on average 3.676428346236032) internal successors, (104951), 28547 states have internal predecessors, (104951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:31,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28548 states to 28548 states and 104951 transitions. [2021-06-05 14:08:31,405 INFO L78 Accepts]: Start accepts. Automaton has 28548 states and 104951 transitions. Word has length 22 [2021-06-05 14:08:31,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:31,405 INFO L482 AbstractCegarLoop]: Abstraction has 28548 states and 104951 transitions. [2021-06-05 14:08:31,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:31,405 INFO L276 IsEmpty]: Start isEmpty. Operand 28548 states and 104951 transitions. [2021-06-05 14:08:31,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:31,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:31,411 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:31,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21495,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:31,628 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:31,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:31,628 INFO L82 PathProgramCache]: Analyzing trace with hash -421935587, now seen corresponding path program 130 times [2021-06-05 14:08:31,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:31,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372919242] [2021-06-05 14:08:31,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:31,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:31,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372919242] [2021-06-05 14:08:31,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372919242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:31,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695993740] [2021-06-05 14:08:31,698 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 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 14:08:31,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:31,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:31,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:31,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:31,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695993740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:31,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:31,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:08:31,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095988837] [2021-06-05 14:08:31,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:31,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:31,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:31,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:31,756 INFO L87 Difference]: Start difference. First operand 28548 states and 104951 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:32,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:32,041 INFO L93 Difference]: Finished difference Result 28872 states and 105754 transitions. [2021-06-05 14:08:32,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:08:32,041 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:32,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:32,117 INFO L225 Difference]: With dead ends: 28872 [2021-06-05 14:08:32,117 INFO L226 Difference]: Without dead ends: 28867 [2021-06-05 14:08:32,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 145.4ms TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:32,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28867 states. [2021-06-05 14:08:32,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28867 to 28548. [2021-06-05 14:08:32,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28548 states, 28547 states have (on average 3.676393316285424) internal successors, (104950), 28547 states have internal predecessors, (104950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:32,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28548 states to 28548 states and 104950 transitions. [2021-06-05 14:08:32,706 INFO L78 Accepts]: Start accepts. Automaton has 28548 states and 104950 transitions. Word has length 22 [2021-06-05 14:08:32,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:32,707 INFO L482 AbstractCegarLoop]: Abstraction has 28548 states and 104950 transitions. [2021-06-05 14:08:32,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:32,707 INFO L276 IsEmpty]: Start isEmpty. Operand 28548 states and 104950 transitions. [2021-06-05 14:08:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:32,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:32,713 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:32,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21496 [2021-06-05 14:08:32,913 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:32,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:32,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2110995402, now seen corresponding path program 131 times [2021-06-05 14:08:32,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:32,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743556634] [2021-06-05 14:08:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:32,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:32,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743556634] [2021-06-05 14:08:32,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743556634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:32,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303070608] [2021-06-05 14:08:32,986 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 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 14:08:33,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:08:33,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:33,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:33,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:33,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303070608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:33,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:33,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:08:33,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876101170] [2021-06-05 14:08:33,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:33,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:33,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:33,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:33,052 INFO L87 Difference]: Start difference. First operand 28548 states and 104950 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:33,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:33,480 INFO L93 Difference]: Finished difference Result 31093 states and 113517 transitions. [2021-06-05 14:08:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:08:33,480 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:33,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:33,575 INFO L225 Difference]: With dead ends: 31093 [2021-06-05 14:08:33,576 INFO L226 Difference]: Without dead ends: 31093 [2021-06-05 14:08:33,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:08:33,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31093 states. [2021-06-05 14:08:34,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31093 to 30705. [2021-06-05 14:08:34,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30705 states, 30704 states have (on average 3.6772081813444504) internal successors, (112905), 30704 states have internal predecessors, (112905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:34,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30705 states to 30705 states and 112905 transitions. [2021-06-05 14:08:34,373 INFO L78 Accepts]: Start accepts. Automaton has 30705 states and 112905 transitions. Word has length 22 [2021-06-05 14:08:34,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:34,373 INFO L482 AbstractCegarLoop]: Abstraction has 30705 states and 112905 transitions. [2021-06-05 14:08:34,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:34,373 INFO L276 IsEmpty]: Start isEmpty. Operand 30705 states and 112905 transitions. [2021-06-05 14:08:34,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:34,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:34,379 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:34,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21497 [2021-06-05 14:08:34,596 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:34,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:34,596 INFO L82 PathProgramCache]: Analyzing trace with hash -864834727, now seen corresponding path program 132 times [2021-06-05 14:08:34,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:34,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575980734] [2021-06-05 14:08:34,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:34,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:34,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575980734] [2021-06-05 14:08:34,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575980734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:34,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212259380] [2021-06-05 14:08:34,669 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 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 14:08:34,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:08:34,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:34,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:34,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:34,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212259380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:34,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:34,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:08:34,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535643562] [2021-06-05 14:08:34,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:34,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:34,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:34,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:34,733 INFO L87 Difference]: Start difference. First operand 30705 states and 112905 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:35,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:35,043 INFO L93 Difference]: Finished difference Result 31001 states and 113666 transitions. [2021-06-05 14:08:35,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:08:35,043 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:35,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:35,124 INFO L225 Difference]: With dead ends: 31001 [2021-06-05 14:08:35,124 INFO L226 Difference]: Without dead ends: 30995 [2021-06-05 14:08:35,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=247, Invalid=509, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:35,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30995 states. [2021-06-05 14:08:35,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30995 to 30706. [2021-06-05 14:08:35,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30706 states, 30705 states have (on average 3.6770884220810944) internal successors, (112905), 30705 states have internal predecessors, (112905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30706 states to 30706 states and 112905 transitions. [2021-06-05 14:08:35,810 INFO L78 Accepts]: Start accepts. Automaton has 30706 states and 112905 transitions. Word has length 22 [2021-06-05 14:08:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:35,810 INFO L482 AbstractCegarLoop]: Abstraction has 30706 states and 112905 transitions. [2021-06-05 14:08:35,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 30706 states and 112905 transitions. [2021-06-05 14:08:35,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:35,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:35,817 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:36,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21498 [2021-06-05 14:08:36,033 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:36,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:36,033 INFO L82 PathProgramCache]: Analyzing trace with hash -700836956, now seen corresponding path program 133 times [2021-06-05 14:08:36,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:36,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222181149] [2021-06-05 14:08:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:36,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:36,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222181149] [2021-06-05 14:08:36,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222181149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:36,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563932930] [2021-06-05 14:08:36,105 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 14:08:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:36,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:36,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:36,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563932930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:36,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:36,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:08:36,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179741615] [2021-06-05 14:08:36,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:08:36,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:36,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:08:36,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:36,186 INFO L87 Difference]: Start difference. First operand 30706 states and 112905 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:36,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:36,578 INFO L93 Difference]: Finished difference Result 32605 states and 118879 transitions. [2021-06-05 14:08:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:08:36,578 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:08:36,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:36,668 INFO L225 Difference]: With dead ends: 32605 [2021-06-05 14:08:36,668 INFO L226 Difference]: Without dead ends: 32605 [2021-06-05 14:08:36,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 230.6ms TimeCoverageRelationStatistics Valid=456, Invalid=876, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:08:36,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32605 states. [2021-06-05 14:08:37,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32605 to 32065. [2021-06-05 14:08:37,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32065 states, 32064 states have (on average 3.6761477045908184) internal successors, (117872), 32064 states have internal predecessors, (117872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:37,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32065 states to 32065 states and 117872 transitions. [2021-06-05 14:08:37,666 INFO L78 Accepts]: Start accepts. Automaton has 32065 states and 117872 transitions. Word has length 22 [2021-06-05 14:08:37,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:37,666 INFO L482 AbstractCegarLoop]: Abstraction has 32065 states and 117872 transitions. [2021-06-05 14:08:37,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:37,666 INFO L276 IsEmpty]: Start isEmpty. Operand 32065 states and 117872 transitions. [2021-06-05 14:08:37,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:37,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:37,673 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:37,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21499 [2021-06-05 14:08:37,886 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:37,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:37,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1675189249, now seen corresponding path program 134 times [2021-06-05 14:08:37,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:37,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140335316] [2021-06-05 14:08:37,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:08:37,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:37,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140335316] [2021-06-05 14:08:37,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140335316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:37,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096014887] [2021-06-05 14:08:37,929 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 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 14:08:37,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:37,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:37,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:37,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:08:37,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096014887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:37,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:37,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:08:37,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308817188] [2021-06-05 14:08:37,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:08:37,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:37,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:08:37,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:08:37,993 INFO L87 Difference]: Start difference. First operand 32065 states and 117872 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 14:08:38,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:38,222 INFO L93 Difference]: Finished difference Result 32258 states and 118308 transitions. [2021-06-05 14:08:38,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:08:38,223 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 14:08:38,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:38,305 INFO L225 Difference]: With dead ends: 32258 [2021-06-05 14:08:38,305 INFO L226 Difference]: Without dead ends: 32258 [2021-06-05 14:08:38,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:08:38,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32258 states. [2021-06-05 14:08:39,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32258 to 32110. [2021-06-05 14:08:39,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32110 states, 32109 states have (on average 3.6754492509888195) internal successors, (118015), 32109 states have internal predecessors, (118015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:39,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32110 states to 32110 states and 118015 transitions. [2021-06-05 14:08:39,337 INFO L78 Accepts]: Start accepts. Automaton has 32110 states and 118015 transitions. Word has length 22 [2021-06-05 14:08:39,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:39,337 INFO L482 AbstractCegarLoop]: Abstraction has 32110 states and 118015 transitions. [2021-06-05 14:08:39,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 14:08:39,337 INFO L276 IsEmpty]: Start isEmpty. Operand 32110 states and 118015 transitions. [2021-06-05 14:08:39,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:39,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:39,344 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:39,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21500 [2021-06-05 14:08:39,562 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:39,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:39,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1842033802, now seen corresponding path program 135 times [2021-06-05 14:08:39,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:39,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90725190] [2021-06-05 14:08:39,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:08:39,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:39,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90725190] [2021-06-05 14:08:39,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90725190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:39,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635800812] [2021-06-05 14:08:39,628 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 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 14:08:39,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:08:39,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:39,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:39,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:08:39,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635800812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:39,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:39,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:08:39,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508608608] [2021-06-05 14:08:39,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:08:39,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:39,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:08:39,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:08:39,808 INFO L87 Difference]: Start difference. First operand 32110 states and 118015 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 14:08:40,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:40,244 INFO L93 Difference]: Finished difference Result 36772 states and 134931 transitions. [2021-06-05 14:08:40,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:08:40,244 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 14:08:40,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:40,330 INFO L225 Difference]: With dead ends: 36772 [2021-06-05 14:08:40,330 INFO L226 Difference]: Without dead ends: 36768 [2021-06-05 14:08:40,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:08:40,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36768 states. [2021-06-05 14:08:41,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36768 to 36566. [2021-06-05 14:08:41,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36566 states, 36565 states have (on average 3.6828114316969778) internal successors, (134662), 36565 states have internal predecessors, (134662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:41,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36566 states to 36566 states and 134662 transitions. [2021-06-05 14:08:41,349 INFO L78 Accepts]: Start accepts. Automaton has 36566 states and 134662 transitions. Word has length 22 [2021-06-05 14:08:41,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:41,350 INFO L482 AbstractCegarLoop]: Abstraction has 36566 states and 134662 transitions. [2021-06-05 14:08:41,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 14:08:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 36566 states and 134662 transitions. [2021-06-05 14:08:41,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:41,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:41,358 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:41,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21501 [2021-06-05 14:08:41,573 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:41,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:41,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1592090717, now seen corresponding path program 136 times [2021-06-05 14:08:41,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:41,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756132253] [2021-06-05 14:08:41,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:08:41,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:41,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756132253] [2021-06-05 14:08:41,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756132253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:41,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543168902] [2021-06-05 14:08:41,973 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 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 14:08:41,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:41,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:42,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:42,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:08:42,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543168902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:42,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:42,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:08:42,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755533918] [2021-06-05 14:08:42,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:08:42,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:42,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:08:42,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:08:42,031 INFO L87 Difference]: Start difference. First operand 36566 states and 134662 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:42,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:42,485 INFO L93 Difference]: Finished difference Result 36756 states and 135097 transitions. [2021-06-05 14:08:42,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:08:42,485 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:08:42,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:42,602 INFO L225 Difference]: With dead ends: 36756 [2021-06-05 14:08:42,602 INFO L226 Difference]: Without dead ends: 36753 [2021-06-05 14:08:42,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 374.7ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:08:42,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36753 states. [2021-06-05 14:08:43,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36753 to 36566. [2021-06-05 14:08:43,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36566 states, 36565 states have (on average 3.682756734582251) internal successors, (134660), 36565 states have internal predecessors, (134660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36566 states to 36566 states and 134660 transitions. [2021-06-05 14:08:43,671 INFO L78 Accepts]: Start accepts. Automaton has 36566 states and 134660 transitions. Word has length 22 [2021-06-05 14:08:43,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:43,671 INFO L482 AbstractCegarLoop]: Abstraction has 36566 states and 134660 transitions. [2021-06-05 14:08:43,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:43,671 INFO L276 IsEmpty]: Start isEmpty. Operand 36566 states and 134660 transitions. [2021-06-05 14:08:43,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:43,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:43,678 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:43,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21502 [2021-06-05 14:08:43,894 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:43,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:43,895 INFO L82 PathProgramCache]: Analyzing trace with hash -180448694, now seen corresponding path program 137 times [2021-06-05 14:08:43,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:43,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865271353] [2021-06-05 14:08:43,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:08:43,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:43,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865271353] [2021-06-05 14:08:43,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865271353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:43,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238805129] [2021-06-05 14:08:43,940 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 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 14:08:43,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:08:43,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:43,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:43,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:08:44,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238805129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:44,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:44,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:08:44,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563923550] [2021-06-05 14:08:44,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:08:44,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:44,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:08:44,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:08:44,010 INFO L87 Difference]: Start difference. First operand 36566 states and 134660 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:44,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:44,504 INFO L93 Difference]: Finished difference Result 38596 states and 141165 transitions. [2021-06-05 14:08:44,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:08:44,504 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:08:44,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:44,612 INFO L225 Difference]: With dead ends: 38596 [2021-06-05 14:08:44,612 INFO L226 Difference]: Without dead ends: 38596 [2021-06-05 14:08:44,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:08:44,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38596 states. [2021-06-05 14:08:45,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38596 to 38072. [2021-06-05 14:08:45,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38072 states, 38071 states have (on average 3.6814373144913453) internal successors, (140156), 38071 states have internal predecessors, (140156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38072 states to 38072 states and 140156 transitions. [2021-06-05 14:08:45,739 INFO L78 Accepts]: Start accepts. Automaton has 38072 states and 140156 transitions. Word has length 22 [2021-06-05 14:08:45,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:45,739 INFO L482 AbstractCegarLoop]: Abstraction has 38072 states and 140156 transitions. [2021-06-05 14:08:45,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:45,740 INFO L276 IsEmpty]: Start isEmpty. Operand 38072 states and 140156 transitions. [2021-06-05 14:08:45,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:45,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:45,747 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:45,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21503,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:45,963 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:45,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:45,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1085744451, now seen corresponding path program 138 times [2021-06-05 14:08:45,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:45,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327674160] [2021-06-05 14:08:45,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:46,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:46,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327674160] [2021-06-05 14:08:46,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327674160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:46,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734909563] [2021-06-05 14:08:46,024 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 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 14:08:46,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 14:08:46,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:46,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:46,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:08:46,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734909563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:46,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:46,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:08:46,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803469514] [2021-06-05 14:08:46,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:08:46,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:46,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:08:46,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:08:46,085 INFO L87 Difference]: Start difference. First operand 38072 states and 140156 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:46,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:46,359 INFO L93 Difference]: Finished difference Result 38447 states and 141068 transitions. [2021-06-05 14:08:46,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:08:46,359 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:08:46,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:46,654 INFO L225 Difference]: With dead ends: 38447 [2021-06-05 14:08:46,654 INFO L226 Difference]: Without dead ends: 38444 [2021-06-05 14:08:46,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:08:46,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38444 states. [2021-06-05 14:08:47,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38444 to 38072. [2021-06-05 14:08:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38072 states, 38071 states have (on average 3.6813322476425627) internal successors, (140152), 38071 states have internal predecessors, (140152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:47,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38072 states to 38072 states and 140152 transitions. [2021-06-05 14:08:47,586 INFO L78 Accepts]: Start accepts. Automaton has 38072 states and 140152 transitions. Word has length 22 [2021-06-05 14:08:47,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:47,586 INFO L482 AbstractCegarLoop]: Abstraction has 38072 states and 140152 transitions. [2021-06-05 14:08:47,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:47,587 INFO L276 IsEmpty]: Start isEmpty. Operand 38072 states and 140152 transitions. [2021-06-05 14:08:47,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:47,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:47,594 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:47,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21504,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:47,812 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:47,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:47,812 INFO L82 PathProgramCache]: Analyzing trace with hash -686794960, now seen corresponding path program 139 times [2021-06-05 14:08:47,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:47,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979854444] [2021-06-05 14:08:47,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:47,874 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:47,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:47,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979854444] [2021-06-05 14:08:47,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979854444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:47,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465160074] [2021-06-05 14:08:47,874 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 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 14:08:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:47,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:47,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:08:47,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465160074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:47,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:47,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:08:47,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480078542] [2021-06-05 14:08:47,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:08:47,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:47,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:08:47,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:08:47,944 INFO L87 Difference]: Start difference. First operand 38072 states and 140152 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:48,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:48,680 INFO L93 Difference]: Finished difference Result 47743 states and 174806 transitions. [2021-06-05 14:08:48,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:08:48,693 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:08:48,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:48,833 INFO L225 Difference]: With dead ends: 47743 [2021-06-05 14:08:48,833 INFO L226 Difference]: Without dead ends: 47743 [2021-06-05 14:08:48,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:08:48,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47743 states. [2021-06-05 14:08:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47743 to 46337. [2021-06-05 14:08:49,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46337 states, 46336 states have (on average 3.694190262430939) internal successors, (171174), 46336 states have internal predecessors, (171174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:50,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46337 states to 46337 states and 171174 transitions. [2021-06-05 14:08:50,084 INFO L78 Accepts]: Start accepts. Automaton has 46337 states and 171174 transitions. Word has length 22 [2021-06-05 14:08:50,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:50,085 INFO L482 AbstractCegarLoop]: Abstraction has 46337 states and 171174 transitions. [2021-06-05 14:08:50,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:50,085 INFO L276 IsEmpty]: Start isEmpty. Operand 46337 states and 171174 transitions. [2021-06-05 14:08:50,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:50,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:50,092 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:50,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21505,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:50,309 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:50,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:50,309 INFO L82 PathProgramCache]: Analyzing trace with hash 12659071, now seen corresponding path program 140 times [2021-06-05 14:08:50,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:50,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536195801] [2021-06-05 14:08:50,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:50,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:50,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536195801] [2021-06-05 14:08:50,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536195801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:50,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060193985] [2021-06-05 14:08:50,363 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 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 14:08:50,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:50,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:50,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:50,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:08:50,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060193985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:50,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:50,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:08:50,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309796415] [2021-06-05 14:08:50,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:08:50,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:50,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:08:50,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:08:50,427 INFO L87 Difference]: Start difference. First operand 46337 states and 171174 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:51,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:51,035 INFO L93 Difference]: Finished difference Result 46705 states and 172114 transitions. [2021-06-05 14:08:51,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:08:51,035 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:08:51,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:51,153 INFO L225 Difference]: With dead ends: 46705 [2021-06-05 14:08:51,153 INFO L226 Difference]: Without dead ends: 46701 [2021-06-05 14:08:51,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:08:51,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46701 states. [2021-06-05 14:08:52,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46701 to 46347. [2021-06-05 14:08:52,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46347 states, 46346 states have (on average 3.693911017132007) internal successors, (171198), 46346 states have internal predecessors, (171198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:52,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46347 states to 46347 states and 171198 transitions. [2021-06-05 14:08:52,419 INFO L78 Accepts]: Start accepts. Automaton has 46347 states and 171198 transitions. Word has length 22 [2021-06-05 14:08:52,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:52,420 INFO L482 AbstractCegarLoop]: Abstraction has 46347 states and 171198 transitions. [2021-06-05 14:08:52,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:52,420 INFO L276 IsEmpty]: Start isEmpty. Operand 46347 states and 171198 transitions. [2021-06-05 14:08:52,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:52,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:52,428 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:52,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21506,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:52,644 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:52,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:52,645 INFO L82 PathProgramCache]: Analyzing trace with hash -148939382, now seen corresponding path program 141 times [2021-06-05 14:08:52,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:52,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166986026] [2021-06-05 14:08:52,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:52,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:52,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166986026] [2021-06-05 14:08:52,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166986026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:52,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403109489] [2021-06-05 14:08:52,705 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 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 14:08:52,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:08:52,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:52,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:52,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:08:52,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403109489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:52,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:52,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:08:52,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266376406] [2021-06-05 14:08:52,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:08:52,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:52,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:08:52,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:08:52,810 INFO L87 Difference]: Start difference. First operand 46347 states and 171198 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:53,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:53,714 INFO L93 Difference]: Finished difference Result 49378 states and 181574 transitions. [2021-06-05 14:08:53,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:08:53,715 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:08:53,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:53,885 INFO L225 Difference]: With dead ends: 49378 [2021-06-05 14:08:53,885 INFO L226 Difference]: Without dead ends: 49378 [2021-06-05 14:08:53,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=197, Invalid=355, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:08:53,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49378 states. [2021-06-05 14:08:54,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49378 to 48899. [2021-06-05 14:08:55,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48899 states, 48898 states have (on average 3.6954272158370487) internal successors, (180699), 48898 states have internal predecessors, (180699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48899 states to 48899 states and 180699 transitions. [2021-06-05 14:08:55,202 INFO L78 Accepts]: Start accepts. Automaton has 48899 states and 180699 transitions. Word has length 22 [2021-06-05 14:08:55,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:55,203 INFO L482 AbstractCegarLoop]: Abstraction has 48899 states and 180699 transitions. [2021-06-05 14:08:55,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 48899 states and 180699 transitions. [2021-06-05 14:08:55,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:55,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:55,212 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:55,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21507 [2021-06-05 14:08:55,429 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:55,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:55,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1726087907, now seen corresponding path program 142 times [2021-06-05 14:08:55,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:55,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100830617] [2021-06-05 14:08:55,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 19 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:55,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:55,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100830617] [2021-06-05 14:08:55,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100830617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:55,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080922919] [2021-06-05 14:08:55,514 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 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 14:08:55,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:55,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:55,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:55,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:55,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080922919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:55,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:55,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:08:55,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673118911] [2021-06-05 14:08:55,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:08:55,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:55,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:08:55,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:55,573 INFO L87 Difference]: Start difference. First operand 48899 states and 180699 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:55,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:55,930 INFO L93 Difference]: Finished difference Result 49336 states and 181769 transitions. [2021-06-05 14:08:55,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:08:55,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:08:55,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:56,072 INFO L225 Difference]: With dead ends: 49336 [2021-06-05 14:08:56,073 INFO L226 Difference]: Without dead ends: 49333 [2021-06-05 14:08:56,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:08:56,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49333 states. [2021-06-05 14:08:57,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49333 to 48899. [2021-06-05 14:08:57,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48899 states, 48898 states have (on average 3.6953045114319605) internal successors, (180693), 48898 states have internal predecessors, (180693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:57,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48899 states to 48899 states and 180693 transitions. [2021-06-05 14:08:57,752 INFO L78 Accepts]: Start accepts. Automaton has 48899 states and 180693 transitions. Word has length 22 [2021-06-05 14:08:57,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:57,752 INFO L482 AbstractCegarLoop]: Abstraction has 48899 states and 180693 transitions. [2021-06-05 14:08:57,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:57,752 INFO L276 IsEmpty]: Start isEmpty. Operand 48899 states and 180693 transitions. [2021-06-05 14:08:57,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:57,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:57,760 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:57,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21508,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:57,977 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:57,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:57,978 INFO L82 PathProgramCache]: Analyzing trace with hash 796339978, now seen corresponding path program 143 times [2021-06-05 14:08:57,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:57,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880563103] [2021-06-05 14:08:57,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:58,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:58,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880563103] [2021-06-05 14:08:58,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880563103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:58,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928122006] [2021-06-05 14:08:58,068 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 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 14:08:58,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:08:58,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:58,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:58,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:58,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928122006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:58,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:58,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:08:58,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780227024] [2021-06-05 14:08:58,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:08:58,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:58,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:08:58,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:58,149 INFO L87 Difference]: Start difference. First operand 48899 states and 180693 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:58,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:58,570 INFO L93 Difference]: Finished difference Result 55383 states and 202292 transitions. [2021-06-05 14:08:58,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:08:58,571 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:08:58,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:58,741 INFO L225 Difference]: With dead ends: 55383 [2021-06-05 14:08:58,742 INFO L226 Difference]: Without dead ends: 55383 [2021-06-05 14:08:58,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:08:58,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55383 states. [2021-06-05 14:09:00,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55383 to 46016. [2021-06-05 14:09:00,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46016 states, 46015 states have (on average 3.6818428773226124) internal successors, (169420), 46015 states have internal predecessors, (169420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:00,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46016 states to 46016 states and 169420 transitions. [2021-06-05 14:09:00,190 INFO L78 Accepts]: Start accepts. Automaton has 46016 states and 169420 transitions. Word has length 22 [2021-06-05 14:09:00,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:00,190 INFO L482 AbstractCegarLoop]: Abstraction has 46016 states and 169420 transitions. [2021-06-05 14:09:00,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:00,190 INFO L276 IsEmpty]: Start isEmpty. Operand 46016 states and 169420 transitions. [2021-06-05 14:09:00,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:00,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:00,197 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:00,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21509 [2021-06-05 14:09:00,413 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:00,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:00,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1495794009, now seen corresponding path program 144 times [2021-06-05 14:09:00,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:00,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809642144] [2021-06-05 14:09:00,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:00,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:00,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809642144] [2021-06-05 14:09:00,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809642144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:00,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499378943] [2021-06-05 14:09:00,592 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 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 14:09:00,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:09:00,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:00,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:00,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:00,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499378943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:00,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:00,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:09:00,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814263896] [2021-06-05 14:09:00,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:09:00,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:00,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:09:00,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:09:00,662 INFO L87 Difference]: Start difference. First operand 46016 states and 169420 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:01,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:01,341 INFO L93 Difference]: Finished difference Result 46465 states and 170554 transitions. [2021-06-05 14:09:01,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:09:01,342 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:09:01,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:01,472 INFO L225 Difference]: With dead ends: 46465 [2021-06-05 14:09:01,473 INFO L226 Difference]: Without dead ends: 46461 [2021-06-05 14:09:01,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:09:01,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46461 states. [2021-06-05 14:09:02,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46461 to 46018. [2021-06-05 14:09:02,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46018 states, 46017 states have (on average 3.6818349740313363) internal successors, (169427), 46017 states have internal predecessors, (169427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:02,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46018 states to 46018 states and 169427 transitions. [2021-06-05 14:09:02,695 INFO L78 Accepts]: Start accepts. Automaton has 46018 states and 169427 transitions. Word has length 22 [2021-06-05 14:09:02,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:02,695 INFO L482 AbstractCegarLoop]: Abstraction has 46018 states and 169427 transitions. [2021-06-05 14:09:02,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 46018 states and 169427 transitions. [2021-06-05 14:09:02,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:02,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:02,703 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:02,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21510 [2021-06-05 14:09:02,919 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:02,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:02,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1334195556, now seen corresponding path program 145 times [2021-06-05 14:09:02,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:02,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018199328] [2021-06-05 14:09:02,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:02,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:02,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018199328] [2021-06-05 14:09:02,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018199328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:02,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470887607] [2021-06-05 14:09:02,975 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 14:09:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:03,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:03,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:03,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470887607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:03,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:03,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:09:03,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310438788] [2021-06-05 14:09:03,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:09:03,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:03,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:09:03,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:09:03,039 INFO L87 Difference]: Start difference. First operand 46018 states and 169427 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:03,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:03,405 INFO L93 Difference]: Finished difference Result 53081 states and 194778 transitions. [2021-06-05 14:09:03,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:09:03,405 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:09:03,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:03,562 INFO L225 Difference]: With dead ends: 53081 [2021-06-05 14:09:03,562 INFO L226 Difference]: Without dead ends: 53081 [2021-06-05 14:09:03,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:09:03,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53081 states. [2021-06-05 14:09:05,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53081 to 50036. [2021-06-05 14:09:05,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50036 states, 50035 states have (on average 3.6892775057459777) internal successors, (184593), 50035 states have internal predecessors, (184593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:05,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50036 states to 50036 states and 184593 transitions. [2021-06-05 14:09:05,592 INFO L78 Accepts]: Start accepts. Automaton has 50036 states and 184593 transitions. Word has length 22 [2021-06-05 14:09:05,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:05,592 INFO L482 AbstractCegarLoop]: Abstraction has 50036 states and 184593 transitions. [2021-06-05 14:09:05,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:05,592 INFO L276 IsEmpty]: Start isEmpty. Operand 50036 states and 184593 transitions. [2021-06-05 14:09:05,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:05,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:05,604 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:05,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21511 [2021-06-05 14:09:05,805 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:05,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:05,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081699, now seen corresponding path program 146 times [2021-06-05 14:09:05,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:05,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958463601] [2021-06-05 14:09:05,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:05,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:05,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958463601] [2021-06-05 14:09:05,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958463601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:05,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986388109] [2021-06-05 14:09:05,872 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 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 14:09:05,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:09:05,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:05,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:05,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:05,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986388109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:05,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:05,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:09:05,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509894606] [2021-06-05 14:09:05,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:09:05,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:05,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:09:05,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:09:05,931 INFO L87 Difference]: Start difference. First operand 50036 states and 184593 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:06,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:06,403 INFO L93 Difference]: Finished difference Result 50456 states and 185678 transitions. [2021-06-05 14:09:06,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:09:06,403 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:09:06,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:06,544 INFO L225 Difference]: With dead ends: 50456 [2021-06-05 14:09:06,544 INFO L226 Difference]: Without dead ends: 50451 [2021-06-05 14:09:06,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:09:06,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50451 states. [2021-06-05 14:09:07,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50451 to 50049. [2021-06-05 14:09:07,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50049 states, 50048 states have (on average 3.6890185421994883) internal successors, (184628), 50048 states have internal predecessors, (184628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:07,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50049 states to 50049 states and 184628 transitions. [2021-06-05 14:09:07,913 INFO L78 Accepts]: Start accepts. Automaton has 50049 states and 184628 transitions. Word has length 22 [2021-06-05 14:09:07,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:07,913 INFO L482 AbstractCegarLoop]: Abstraction has 50049 states and 184628 transitions. [2021-06-05 14:09:07,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:07,913 INFO L276 IsEmpty]: Start isEmpty. Operand 50049 states and 184628 transitions. [2021-06-05 14:09:07,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:07,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:07,921 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:08,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21512 [2021-06-05 14:09:08,137 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:08,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:08,137 INFO L82 PathProgramCache]: Analyzing trace with hash 827849290, now seen corresponding path program 147 times [2021-06-05 14:09:08,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:08,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666011280] [2021-06-05 14:09:08,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:08,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:08,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666011280] [2021-06-05 14:09:08,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666011280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:08,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377527697] [2021-06-05 14:09:08,196 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 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 14:09:08,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:09:08,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:08,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:08,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:08,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377527697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:08,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:08,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:09:08,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254904062] [2021-06-05 14:09:08,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:09:08,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:08,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:09:08,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:09:08,262 INFO L87 Difference]: Start difference. First operand 50049 states and 184628 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:09,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:09,017 INFO L93 Difference]: Finished difference Result 51683 states and 189732 transitions. [2021-06-05 14:09:09,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:09:09,018 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:09:09,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:09,153 INFO L225 Difference]: With dead ends: 51683 [2021-06-05 14:09:09,154 INFO L226 Difference]: Without dead ends: 51683 [2021-06-05 14:09:09,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=303, Invalid=567, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:09:09,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51683 states. [2021-06-05 14:09:10,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51683 to 51187. [2021-06-05 14:09:10,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51187 states, 51186 states have (on average 3.689856601414449) internal successors, (188869), 51186 states have internal predecessors, (188869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:10,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51187 states to 51187 states and 188869 transitions. [2021-06-05 14:09:10,491 INFO L78 Accepts]: Start accepts. Automaton has 51187 states and 188869 transitions. Word has length 22 [2021-06-05 14:09:10,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:10,491 INFO L482 AbstractCegarLoop]: Abstraction has 51187 states and 188869 transitions. [2021-06-05 14:09:10,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand 51187 states and 188869 transitions. [2021-06-05 14:09:10,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:10,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:10,499 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:10,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21513 [2021-06-05 14:09:10,715 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:10,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:10,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1301422211, now seen corresponding path program 148 times [2021-06-05 14:09:10,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:10,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452089362] [2021-06-05 14:09:10,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:10,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:10,797 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:10,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:10,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452089362] [2021-06-05 14:09:10,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452089362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:10,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91873986] [2021-06-05 14:09:10,798 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 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 14:09:10,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:09:10,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:10,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:10,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:10,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91873986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:10,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:10,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:09:10,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330942014] [2021-06-05 14:09:10,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:09:10,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:10,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:09:10,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:09:10,867 INFO L87 Difference]: Start difference. First operand 51187 states and 188869 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:11,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:11,343 INFO L93 Difference]: Finished difference Result 51540 states and 189639 transitions. [2021-06-05 14:09:11,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:09:11,344 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:11,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:11,491 INFO L225 Difference]: With dead ends: 51540 [2021-06-05 14:09:11,491 INFO L226 Difference]: Without dead ends: 51537 [2021-06-05 14:09:11,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:09:11,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51537 states. [2021-06-05 14:09:12,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51537 to 51187. [2021-06-05 14:09:12,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51187 states, 51186 states have (on average 3.6897003086781544) internal successors, (188861), 51186 states have internal predecessors, (188861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:13,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51187 states to 51187 states and 188861 transitions. [2021-06-05 14:09:13,030 INFO L78 Accepts]: Start accepts. Automaton has 51187 states and 188861 transitions. Word has length 22 [2021-06-05 14:09:13,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:13,030 INFO L482 AbstractCegarLoop]: Abstraction has 51187 states and 188861 transitions. [2021-06-05 14:09:13,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:13,030 INFO L276 IsEmpty]: Start isEmpty. Operand 51187 states and 188861 transitions. [2021-06-05 14:09:13,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:13,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:13,038 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:13,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21514 [2021-06-05 14:09:13,249 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:13,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:13,249 INFO L82 PathProgramCache]: Analyzing trace with hash -471117200, now seen corresponding path program 149 times [2021-06-05 14:09:13,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:13,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800459416] [2021-06-05 14:09:13,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:13,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:13,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800459416] [2021-06-05 14:09:13,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800459416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:13,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061728781] [2021-06-05 14:09:13,321 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 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 14:09:13,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:09:13,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:13,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:13,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:13,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061728781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:13,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:13,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:09:13,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688089285] [2021-06-05 14:09:13,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:09:13,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:13,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:09:13,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:09:13,384 INFO L87 Difference]: Start difference. First operand 51187 states and 188861 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:14,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:14,065 INFO L93 Difference]: Finished difference Result 54243 states and 197469 transitions. [2021-06-05 14:09:14,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:09:14,066 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:14,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:14,213 INFO L225 Difference]: With dead ends: 54243 [2021-06-05 14:09:14,214 INFO L226 Difference]: Without dead ends: 54243 [2021-06-05 14:09:14,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:09:14,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54243 states. [2021-06-05 14:09:14,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54243 to 19825. [2021-06-05 14:09:14,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19825 states, 19824 states have (on average 3.5682001614205006) internal successors, (70736), 19824 states have internal predecessors, (70736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:15,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19825 states to 19825 states and 70736 transitions. [2021-06-05 14:09:15,324 INFO L78 Accepts]: Start accepts. Automaton has 19825 states and 70736 transitions. Word has length 22 [2021-06-05 14:09:15,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:15,324 INFO L482 AbstractCegarLoop]: Abstraction has 19825 states and 70736 transitions. [2021-06-05 14:09:15,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:15,324 INFO L276 IsEmpty]: Start isEmpty. Operand 19825 states and 70736 transitions. [2021-06-05 14:09:15,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:15,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:15,331 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:15,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21515,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:15,531 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:15,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:15,532 INFO L82 PathProgramCache]: Analyzing trace with hash 228336831, now seen corresponding path program 150 times [2021-06-05 14:09:15,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:15,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867901887] [2021-06-05 14:09:15,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:15,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:15,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867901887] [2021-06-05 14:09:15,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867901887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:15,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830826215] [2021-06-05 14:09:15,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:09:15,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:09:15,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:15,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:15,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:15,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830826215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:15,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:15,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:09:15,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088205484] [2021-06-05 14:09:15,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:09:15,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:15,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:09:15,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:09:15,679 INFO L87 Difference]: Start difference. First operand 19825 states and 70736 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:15,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:15,924 INFO L93 Difference]: Finished difference Result 20359 states and 72090 transitions. [2021-06-05 14:09:15,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:09:15,924 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:15,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:15,974 INFO L225 Difference]: With dead ends: 20359 [2021-06-05 14:09:15,974 INFO L226 Difference]: Without dead ends: 20355 [2021-06-05 14:09:15,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 131.9ms TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:09:15,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20355 states. [2021-06-05 14:09:16,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20355 to 19828. [2021-06-05 14:09:16,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19828 states, 19827 states have (on average 3.568215060271347) internal successors, (70747), 19827 states have internal predecessors, (70747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:16,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19828 states to 19828 states and 70747 transitions. [2021-06-05 14:09:16,390 INFO L78 Accepts]: Start accepts. Automaton has 19828 states and 70747 transitions. Word has length 22 [2021-06-05 14:09:16,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:16,390 INFO L482 AbstractCegarLoop]: Abstraction has 19828 states and 70747 transitions. [2021-06-05 14:09:16,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:16,390 INFO L276 IsEmpty]: Start isEmpty. Operand 19828 states and 70747 transitions. [2021-06-05 14:09:16,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:16,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:16,398 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:16,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21516,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:16,613 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:16,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:16,613 INFO L82 PathProgramCache]: Analyzing trace with hash 66738378, now seen corresponding path program 151 times [2021-06-05 14:09:16,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:16,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586386859] [2021-06-05 14:09:16,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:16,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:16,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586386859] [2021-06-05 14:09:16,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586386859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:16,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442101836] [2021-06-05 14:09:16,673 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 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 14:09:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:16,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:16,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:16,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442101836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:16,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:16,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:09:16,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569270953] [2021-06-05 14:09:16,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:09:16,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:16,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:09:16,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:09:16,733 INFO L87 Difference]: Start difference. First operand 19828 states and 70747 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:16,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:16,965 INFO L93 Difference]: Finished difference Result 28252 states and 100763 transitions. [2021-06-05 14:09:16,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:09:16,965 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:16,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:17,217 INFO L225 Difference]: With dead ends: 28252 [2021-06-05 14:09:17,217 INFO L226 Difference]: Without dead ends: 28252 [2021-06-05 14:09:17,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:09:17,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28252 states. [2021-06-05 14:09:17,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28252 to 19605. [2021-06-05 14:09:17,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19605 states, 19604 states have (on average 3.569118547235258) internal successors, (69969), 19604 states have internal predecessors, (69969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:17,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19605 states to 19605 states and 69969 transitions. [2021-06-05 14:09:17,703 INFO L78 Accepts]: Start accepts. Automaton has 19605 states and 69969 transitions. Word has length 22 [2021-06-05 14:09:17,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:17,704 INFO L482 AbstractCegarLoop]: Abstraction has 19605 states and 69969 transitions. [2021-06-05 14:09:17,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:17,704 INFO L276 IsEmpty]: Start isEmpty. Operand 19605 states and 69969 transitions. [2021-06-05 14:09:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:17,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:17,710 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:17,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21517,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:17,911 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:17,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:17,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1322428419, now seen corresponding path program 152 times [2021-06-05 14:09:17,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:17,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583829897] [2021-06-05 14:09:17,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:17,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:17,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583829897] [2021-06-05 14:09:17,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583829897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:17,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326404503] [2021-06-05 14:09:17,983 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 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 14:09:18,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:09:18,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:18,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:18,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:18,039 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:18,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326404503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:18,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:18,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:09:18,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763898770] [2021-06-05 14:09:18,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:09:18,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:18,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:09:18,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:09:18,040 INFO L87 Difference]: Start difference. First operand 19605 states and 69969 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:18,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:18,284 INFO L93 Difference]: Finished difference Result 20123 states and 71290 transitions. [2021-06-05 14:09:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:09:18,284 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:18,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:18,327 INFO L225 Difference]: With dead ends: 20123 [2021-06-05 14:09:18,327 INFO L226 Difference]: Without dead ends: 20118 [2021-06-05 14:09:18,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=270, Invalid=542, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:09:18,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20118 states. [2021-06-05 14:09:18,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20118 to 19607. [2021-06-05 14:09:18,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19607 states, 19606 states have (on average 3.5691114964806694) internal successors, (69976), 19606 states have internal predecessors, (69976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19607 states to 19607 states and 69976 transitions. [2021-06-05 14:09:18,810 INFO L78 Accepts]: Start accepts. Automaton has 19607 states and 69976 transitions. Word has length 22 [2021-06-05 14:09:18,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:18,810 INFO L482 AbstractCegarLoop]: Abstraction has 19607 states and 69976 transitions. [2021-06-05 14:09:18,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 19607 states and 69976 transitions. [2021-06-05 14:09:18,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:18,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:18,817 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:19,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21518,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:19,033 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:19,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:19,033 INFO L82 PathProgramCache]: Analyzing trace with hash -439607888, now seen corresponding path program 153 times [2021-06-05 14:09:19,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:19,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696557500] [2021-06-05 14:09:19,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:19,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:19,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696557500] [2021-06-05 14:09:19,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696557500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:19,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358175556] [2021-06-05 14:09:19,112 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 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 14:09:19,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:09:19,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:19,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:19,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:19,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358175556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:19,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:19,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:09:19,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060699985] [2021-06-05 14:09:19,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:09:19,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:19,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:09:19,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:09:19,184 INFO L87 Difference]: Start difference. First operand 19607 states and 69976 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:19,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:19,424 INFO L93 Difference]: Finished difference Result 21427 states and 75723 transitions. [2021-06-05 14:09:19,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:09:19,425 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:19,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:19,466 INFO L225 Difference]: With dead ends: 21427 [2021-06-05 14:09:19,466 INFO L226 Difference]: Without dead ends: 21427 [2021-06-05 14:09:19,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=276, Invalid=536, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:09:19,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21427 states. [2021-06-05 14:09:19,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21427 to 19699. [2021-06-05 14:09:19,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19699 states, 19698 states have (on average 3.572240836633161) internal successors, (70366), 19698 states have internal predecessors, (70366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:19,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19699 states to 19699 states and 70366 transitions. [2021-06-05 14:09:19,850 INFO L78 Accepts]: Start accepts. Automaton has 19699 states and 70366 transitions. Word has length 22 [2021-06-05 14:09:19,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:19,851 INFO L482 AbstractCegarLoop]: Abstraction has 19699 states and 70366 transitions. [2021-06-05 14:09:19,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:19,851 INFO L276 IsEmpty]: Start isEmpty. Operand 19699 states and 70366 transitions. [2021-06-05 14:09:19,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:19,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:19,857 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:20,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21519 [2021-06-05 14:09:20,057 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:20,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:20,058 INFO L82 PathProgramCache]: Analyzing trace with hash 879529279, now seen corresponding path program 154 times [2021-06-05 14:09:20,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:20,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169325639] [2021-06-05 14:09:20,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:20,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:20,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169325639] [2021-06-05 14:09:20,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169325639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:20,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156241696] [2021-06-05 14:09:20,164 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 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 14:09:20,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:09:20,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:20,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:20,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:20,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156241696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:20,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:20,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:09:20,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141160955] [2021-06-05 14:09:20,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:09:20,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:20,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:09:20,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:09:20,222 INFO L87 Difference]: Start difference. First operand 19699 states and 70366 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:20,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:20,534 INFO L93 Difference]: Finished difference Result 20188 states and 71639 transitions. [2021-06-05 14:09:20,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:09:20,534 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:20,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:20,576 INFO L225 Difference]: With dead ends: 20188 [2021-06-05 14:09:20,576 INFO L226 Difference]: Without dead ends: 20182 [2021-06-05 14:09:20,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 169.6ms TimeCoverageRelationStatistics Valid=268, Invalid=544, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:09:20,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20182 states. [2021-06-05 14:09:20,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20182 to 19713. [2021-06-05 14:09:20,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19713 states, 19712 states have (on average 3.571580762987013) internal successors, (70403), 19712 states have internal predecessors, (70403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:20,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19713 states to 19713 states and 70403 transitions. [2021-06-05 14:09:20,923 INFO L78 Accepts]: Start accepts. Automaton has 19713 states and 70403 transitions. Word has length 22 [2021-06-05 14:09:20,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:20,923 INFO L482 AbstractCegarLoop]: Abstraction has 19713 states and 70403 transitions. [2021-06-05 14:09:20,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:20,924 INFO L276 IsEmpty]: Start isEmpty. Operand 19713 states and 70403 transitions. [2021-06-05 14:09:20,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:20,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:20,930 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:21,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21520,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:21,130 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:21,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:21,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1043527050, now seen corresponding path program 155 times [2021-06-05 14:09:21,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:21,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368598716] [2021-06-05 14:09:21,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:21,220 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:21,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:21,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368598716] [2021-06-05 14:09:21,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368598716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:21,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937700853] [2021-06-05 14:09:21,220 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 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 14:09:21,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:09:21,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:21,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:21,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:21,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937700853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:21,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:21,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:09:21,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399929785] [2021-06-05 14:09:21,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:09:21,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:21,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:09:21,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:09:21,286 INFO L87 Difference]: Start difference. First operand 19713 states and 70403 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:21,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:21,600 INFO L93 Difference]: Finished difference Result 20611 states and 72663 transitions. [2021-06-05 14:09:21,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:09:21,600 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:21,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:21,633 INFO L225 Difference]: With dead ends: 20611 [2021-06-05 14:09:21,634 INFO L226 Difference]: Without dead ends: 20611 [2021-06-05 14:09:21,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 236.2ms TimeCoverageRelationStatistics Valid=455, Invalid=877, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:09:21,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20611 states. [2021-06-05 14:09:21,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20611 to 19594. [2021-06-05 14:09:22,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19594 states, 19593 states have (on average 3.5719389577910476) internal successors, (69985), 19593 states have internal predecessors, (69985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:22,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19594 states to 19594 states and 69985 transitions. [2021-06-05 14:09:22,047 INFO L78 Accepts]: Start accepts. Automaton has 19594 states and 69985 transitions. Word has length 22 [2021-06-05 14:09:22,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:22,047 INFO L482 AbstractCegarLoop]: Abstraction has 19594 states and 69985 transitions. [2021-06-05 14:09:22,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:22,047 INFO L276 IsEmpty]: Start isEmpty. Operand 19594 states and 69985 transitions. [2021-06-05 14:09:22,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:22,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:22,053 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:22,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21521 [2021-06-05 14:09:22,253 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:22,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:22,254 INFO L82 PathProgramCache]: Analyzing trace with hash 19812039, now seen corresponding path program 156 times [2021-06-05 14:09:22,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:22,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124297919] [2021-06-05 14:09:22,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:22,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:22,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124297919] [2021-06-05 14:09:22,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124297919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:22,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825706480] [2021-06-05 14:09:22,310 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 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 14:09:22,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:09:22,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:22,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:22,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:22,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825706480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:22,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:22,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:09:22,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190857184] [2021-06-05 14:09:22,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:09:22,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:22,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:09:22,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:09:22,378 INFO L87 Difference]: Start difference. First operand 19594 states and 69985 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:22,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:22,544 INFO L93 Difference]: Finished difference Result 19840 states and 70288 transitions. [2021-06-05 14:09:22,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:09:22,544 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:22,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:22,582 INFO L225 Difference]: With dead ends: 19840 [2021-06-05 14:09:22,582 INFO L226 Difference]: Without dead ends: 19840 [2021-06-05 14:09:22,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=145, Invalid=197, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:09:22,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19840 states. [2021-06-05 14:09:22,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19840 to 19605. [2021-06-05 14:09:22,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19605 states, 19604 states have (on average 3.5676902672923894) internal successors, (69941), 19604 states have internal predecessors, (69941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:22,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19605 states to 19605 states and 69941 transitions. [2021-06-05 14:09:22,935 INFO L78 Accepts]: Start accepts. Automaton has 19605 states and 69941 transitions. Word has length 22 [2021-06-05 14:09:22,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:22,935 INFO L482 AbstractCegarLoop]: Abstraction has 19605 states and 69941 transitions. [2021-06-05 14:09:22,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:22,935 INFO L276 IsEmpty]: Start isEmpty. Operand 19605 states and 69941 transitions. [2021-06-05 14:09:22,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:22,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:22,941 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:23,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21522 [2021-06-05 14:09:23,142 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:23,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:23,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1103102172, now seen corresponding path program 157 times [2021-06-05 14:09:23,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:23,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610834468] [2021-06-05 14:09:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:23,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:23,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610834468] [2021-06-05 14:09:23,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610834468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:23,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538919488] [2021-06-05 14:09:23,199 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 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 14:09:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:23,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:23,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:23,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538919488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:23,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:23,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:09:23,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199418256] [2021-06-05 14:09:23,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:09:23,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:23,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:09:23,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:09:23,257 INFO L87 Difference]: Start difference. First operand 19605 states and 69941 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:23,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:23,526 INFO L93 Difference]: Finished difference Result 19868 states and 70319 transitions. [2021-06-05 14:09:23,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:09:23,526 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:23,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:23,566 INFO L225 Difference]: With dead ends: 19868 [2021-06-05 14:09:23,566 INFO L226 Difference]: Without dead ends: 19864 [2021-06-05 14:09:23,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:09:23,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19864 states. [2021-06-05 14:09:23,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19864 to 18102. [2021-06-05 14:09:23,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18102 states, 18101 states have (on average 3.551682227501243) internal successors, (64289), 18101 states have internal predecessors, (64289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:23,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18102 states to 18102 states and 64289 transitions. [2021-06-05 14:09:23,921 INFO L78 Accepts]: Start accepts. Automaton has 18102 states and 64289 transitions. Word has length 22 [2021-06-05 14:09:23,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:23,922 INFO L482 AbstractCegarLoop]: Abstraction has 18102 states and 64289 transitions. [2021-06-05 14:09:23,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:23,922 INFO L276 IsEmpty]: Start isEmpty. Operand 18102 states and 64289 transitions. [2021-06-05 14:09:23,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:23,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:23,928 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:24,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21523 [2021-06-05 14:09:24,128 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:24,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:24,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1759904349, now seen corresponding path program 158 times [2021-06-05 14:09:24,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:24,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357666146] [2021-06-05 14:09:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:24,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:24,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357666146] [2021-06-05 14:09:24,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357666146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:24,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807000783] [2021-06-05 14:09:24,237 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 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 14:09:24,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:09:24,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:24,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:24,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:24,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807000783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:24,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:24,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:09:24,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692997891] [2021-06-05 14:09:24,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:09:24,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:24,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:09:24,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:09:24,293 INFO L87 Difference]: Start difference. First operand 18102 states and 64289 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:24,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:24,492 INFO L93 Difference]: Finished difference Result 18321 states and 64608 transitions. [2021-06-05 14:09:24,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:09:24,493 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:24,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:24,529 INFO L225 Difference]: With dead ends: 18321 [2021-06-05 14:09:24,529 INFO L226 Difference]: Without dead ends: 18320 [2021-06-05 14:09:24,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:09:24,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18320 states. [2021-06-05 14:09:24,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18320 to 18102. [2021-06-05 14:09:24,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18102 states, 18101 states have (on average 3.5440583393182696) internal successors, (64151), 18101 states have internal predecessors, (64151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:24,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18102 states to 18102 states and 64151 transitions. [2021-06-05 14:09:24,983 INFO L78 Accepts]: Start accepts. Automaton has 18102 states and 64151 transitions. Word has length 22 [2021-06-05 14:09:24,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:24,983 INFO L482 AbstractCegarLoop]: Abstraction has 18102 states and 64151 transitions. [2021-06-05 14:09:24,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:24,983 INFO L276 IsEmpty]: Start isEmpty. Operand 18102 states and 64151 transitions. [2021-06-05 14:09:24,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:24,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:24,989 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:25,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21524 [2021-06-05 14:09:25,189 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:25,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:25,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1612644214, now seen corresponding path program 159 times [2021-06-05 14:09:25,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:25,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564055793] [2021-06-05 14:09:25,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:25,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:25,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564055793] [2021-06-05 14:09:25,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564055793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:25,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851534956] [2021-06-05 14:09:25,246 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 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 14:09:25,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:09:25,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:25,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:25,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:25,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851534956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:25,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:25,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:09:25,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41378260] [2021-06-05 14:09:25,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:09:25,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:25,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:09:25,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:09:25,307 INFO L87 Difference]: Start difference. First operand 18102 states and 64151 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:25,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:25,431 INFO L93 Difference]: Finished difference Result 18502 states and 64639 transitions. [2021-06-05 14:09:25,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:09:25,432 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:25,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:25,471 INFO L225 Difference]: With dead ends: 18502 [2021-06-05 14:09:25,472 INFO L226 Difference]: Without dead ends: 18502 [2021-06-05 14:09:25,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:09:25,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18502 states. [2021-06-05 14:09:25,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18502 to 18082. [2021-06-05 14:09:25,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18082 states, 18081 states have (on average 3.528565897903877) internal successors, (63800), 18081 states have internal predecessors, (63800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:25,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18082 states to 18082 states and 63800 transitions. [2021-06-05 14:09:25,802 INFO L78 Accepts]: Start accepts. Automaton has 18082 states and 63800 transitions. Word has length 22 [2021-06-05 14:09:25,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:25,802 INFO L482 AbstractCegarLoop]: Abstraction has 18082 states and 63800 transitions. [2021-06-05 14:09:25,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:25,802 INFO L276 IsEmpty]: Start isEmpty. Operand 18082 states and 63800 transitions. [2021-06-05 14:09:25,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:25,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:25,808 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:26,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21525,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:26,008 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:26,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:26,009 INFO L82 PathProgramCache]: Analyzing trace with hash -824449639, now seen corresponding path program 160 times [2021-06-05 14:09:26,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:26,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302825314] [2021-06-05 14:09:26,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:26,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:26,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302825314] [2021-06-05 14:09:26,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302825314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:26,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347425365] [2021-06-05 14:09:26,071 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 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 14:09:26,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:09:26,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:26,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:26,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:26,130 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:26,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347425365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:26,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:26,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:09:26,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50258607] [2021-06-05 14:09:26,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:09:26,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:26,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:09:26,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:09:26,131 INFO L87 Difference]: Start difference. First operand 18082 states and 63800 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:26,360 INFO L93 Difference]: Finished difference Result 18306 states and 64126 transitions. [2021-06-05 14:09:26,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:09:26,361 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:26,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:26,396 INFO L225 Difference]: With dead ends: 18306 [2021-06-05 14:09:26,396 INFO L226 Difference]: Without dead ends: 18304 [2021-06-05 14:09:26,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=272, Invalid=484, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:09:26,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18304 states. [2021-06-05 14:09:26,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18304 to 18082. [2021-06-05 14:09:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18082 states, 18081 states have (on average 3.5282893645262985) internal successors, (63795), 18081 states have internal predecessors, (63795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:26,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18082 states to 18082 states and 63795 transitions. [2021-06-05 14:09:26,833 INFO L78 Accepts]: Start accepts. Automaton has 18082 states and 63795 transitions. Word has length 22 [2021-06-05 14:09:26,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:26,833 INFO L482 AbstractCegarLoop]: Abstraction has 18082 states and 63795 transitions. [2021-06-05 14:09:26,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:26,833 INFO L276 IsEmpty]: Start isEmpty. Operand 18082 states and 63795 transitions. [2021-06-05 14:09:26,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:26,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:26,839 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:27,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21526,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:27,041 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:27,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:27,041 INFO L82 PathProgramCache]: Analyzing trace with hash 953275748, now seen corresponding path program 161 times [2021-06-05 14:09:27,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:27,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754095468] [2021-06-05 14:09:27,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:27,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:27,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754095468] [2021-06-05 14:09:27,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754095468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:27,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394051175] [2021-06-05 14:09:27,098 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 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 14:09:27,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:09:27,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:27,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:27,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:27,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394051175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:27,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:27,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:09:27,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135847392] [2021-06-05 14:09:27,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:09:27,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:27,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:09:27,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:09:27,165 INFO L87 Difference]: Start difference. First operand 18082 states and 63795 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:27,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:27,286 INFO L93 Difference]: Finished difference Result 18305 states and 63748 transitions. [2021-06-05 14:09:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:09:27,287 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:27,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:27,317 INFO L225 Difference]: With dead ends: 18305 [2021-06-05 14:09:27,317 INFO L226 Difference]: Without dead ends: 18305 [2021-06-05 14:09:27,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:09:27,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18305 states. [2021-06-05 14:09:27,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18305 to 17477. [2021-06-05 14:09:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.5275806820782787) internal successors, (61648), 17476 states have internal predecessors, (61648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:27,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 61648 transitions. [2021-06-05 14:09:27,615 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 61648 transitions. Word has length 22 [2021-06-05 14:09:27,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:27,615 INFO L482 AbstractCegarLoop]: Abstraction has 17477 states and 61648 transitions. [2021-06-05 14:09:27,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:27,615 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 61648 transitions. [2021-06-05 14:09:27,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:27,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:27,620 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:27,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21527,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:27,821 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:27,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:27,821 INFO L82 PathProgramCache]: Analyzing trace with hash 664955357, now seen corresponding path program 162 times [2021-06-05 14:09:27,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:27,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200431857] [2021-06-05 14:09:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:27,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:27,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200431857] [2021-06-05 14:09:27,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200431857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:27,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294476919] [2021-06-05 14:09:27,885 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 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 14:09:27,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 14:09:27,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:27,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:27,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:27,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294476919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:27,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:27,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:09:27,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931610458] [2021-06-05 14:09:27,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:09:27,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:27,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:09:27,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:09:27,947 INFO L87 Difference]: Start difference. First operand 17477 states and 61648 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:28,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:28,163 INFO L93 Difference]: Finished difference Result 17705 states and 61981 transitions. [2021-06-05 14:09:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:09:28,164 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:28,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:28,194 INFO L225 Difference]: With dead ends: 17705 [2021-06-05 14:09:28,194 INFO L226 Difference]: Without dead ends: 17702 [2021-06-05 14:09:28,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=304, Invalid=566, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:09:28,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17702 states. [2021-06-05 14:09:28,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17702 to 17477. [2021-06-05 14:09:28,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.5272945754177156) internal successors, (61643), 17476 states have internal predecessors, (61643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:28,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 61643 transitions. [2021-06-05 14:09:28,531 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 61643 transitions. Word has length 22 [2021-06-05 14:09:28,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:28,531 INFO L482 AbstractCegarLoop]: Abstraction has 17477 states and 61643 transitions. [2021-06-05 14:09:28,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:28,531 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 61643 transitions. [2021-06-05 14:09:28,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:28,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:28,536 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:28,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21528,164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:28,737 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:28,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:28,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1107584054, now seen corresponding path program 163 times [2021-06-05 14:09:28,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:28,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959526403] [2021-06-05 14:09:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:28,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:28,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959526403] [2021-06-05 14:09:28,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959526403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:28,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551404967] [2021-06-05 14:09:28,798 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 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 14:09:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:28,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:28,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:28,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551404967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:28,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:28,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:09:28,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511043139] [2021-06-05 14:09:28,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:09:28,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:28,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:09:28,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:09:28,865 INFO L87 Difference]: Start difference. First operand 17477 states and 61643 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:29,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:29,021 INFO L93 Difference]: Finished difference Result 18492 states and 64177 transitions. [2021-06-05 14:09:29,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:09:29,022 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:29,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:29,061 INFO L225 Difference]: With dead ends: 18492 [2021-06-05 14:09:29,061 INFO L226 Difference]: Without dead ends: 18492 [2021-06-05 14:09:29,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:09:29,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18492 states. [2021-06-05 14:09:29,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18492 to 17534. [2021-06-05 14:09:29,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17534 states, 17533 states have (on average 3.5194205213026866) internal successors, (61706), 17533 states have internal predecessors, (61706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17534 states to 17534 states and 61706 transitions. [2021-06-05 14:09:29,418 INFO L78 Accepts]: Start accepts. Automaton has 17534 states and 61706 transitions. Word has length 22 [2021-06-05 14:09:29,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:29,418 INFO L482 AbstractCegarLoop]: Abstraction has 17534 states and 61706 transitions. [2021-06-05 14:09:29,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:29,418 INFO L276 IsEmpty]: Start isEmpty. Operand 17534 states and 61706 transitions. [2021-06-05 14:09:29,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:29,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:29,424 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:29,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21529,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:29,625 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:29,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:29,625 INFO L82 PathProgramCache]: Analyzing trace with hash -408130023, now seen corresponding path program 164 times [2021-06-05 14:09:29,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:29,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695183258] [2021-06-05 14:09:29,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:29,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:29,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695183258] [2021-06-05 14:09:29,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695183258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:29,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469230935] [2021-06-05 14:09:29,696 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 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 14:09:29,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:09:29,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:29,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:29,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:29,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469230935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:29,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:29,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:09:29,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39021749] [2021-06-05 14:09:29,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:09:29,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:29,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:09:29,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:09:29,850 INFO L87 Difference]: Start difference. First operand 17534 states and 61706 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:30,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:30,097 INFO L93 Difference]: Finished difference Result 18165 states and 63327 transitions. [2021-06-05 14:09:30,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:09:30,097 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:30,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:30,129 INFO L225 Difference]: With dead ends: 18165 [2021-06-05 14:09:30,130 INFO L226 Difference]: Without dead ends: 18161 [2021-06-05 14:09:30,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 143.7ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:09:30,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18161 states. [2021-06-05 14:09:30,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18161 to 17542. [2021-06-05 14:09:30,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17542 states, 17541 states have (on average 3.5194116641012485) internal successors, (61734), 17541 states have internal predecessors, (61734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17542 states to 17542 states and 61734 transitions. [2021-06-05 14:09:30,427 INFO L78 Accepts]: Start accepts. Automaton has 17542 states and 61734 transitions. Word has length 22 [2021-06-05 14:09:30,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:30,427 INFO L482 AbstractCegarLoop]: Abstraction has 17542 states and 61734 transitions. [2021-06-05 14:09:30,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:30,427 INFO L276 IsEmpty]: Start isEmpty. Operand 17542 states and 61734 transitions. [2021-06-05 14:09:30,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:30,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:30,432 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:30,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21530,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:30,633 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:30,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:30,633 INFO L82 PathProgramCache]: Analyzing trace with hash -569728476, now seen corresponding path program 165 times [2021-06-05 14:09:30,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:30,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127180743] [2021-06-05 14:09:30,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:30,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:30,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127180743] [2021-06-05 14:09:30,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127180743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:30,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376228563] [2021-06-05 14:09:30,694 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 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 14:09:30,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:09:30,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:30,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:30,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:30,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376228563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:30,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:30,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:09:30,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073803934] [2021-06-05 14:09:30,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:09:30,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:30,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:09:30,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:09:30,759 INFO L87 Difference]: Start difference. First operand 17542 states and 61734 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:30,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:30,930 INFO L93 Difference]: Finished difference Result 23520 states and 82630 transitions. [2021-06-05 14:09:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:09:30,931 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:30,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:30,975 INFO L225 Difference]: With dead ends: 23520 [2021-06-05 14:09:30,975 INFO L226 Difference]: Without dead ends: 23520 [2021-06-05 14:09:30,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:09:30,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23520 states. [2021-06-05 14:09:31,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23520 to 18797. [2021-06-05 14:09:31,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18797 states, 18796 states have (on average 3.5254309427537773) internal successors, (66264), 18796 states have internal predecessors, (66264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:31,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18797 states to 18797 states and 66264 transitions. [2021-06-05 14:09:31,390 INFO L78 Accepts]: Start accepts. Automaton has 18797 states and 66264 transitions. Word has length 22 [2021-06-05 14:09:31,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:31,391 INFO L482 AbstractCegarLoop]: Abstraction has 18797 states and 66264 transitions. [2021-06-05 14:09:31,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:31,391 INFO L276 IsEmpty]: Start isEmpty. Operand 18797 states and 66264 transitions. [2021-06-05 14:09:31,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:31,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:31,396 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:31,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21531 [2021-06-05 14:09:31,596 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:31,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:31,597 INFO L82 PathProgramCache]: Analyzing trace with hash 685961565, now seen corresponding path program 166 times [2021-06-05 14:09:31,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:31,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413572515] [2021-06-05 14:09:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:31,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:31,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413572515] [2021-06-05 14:09:31,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413572515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:31,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851980564] [2021-06-05 14:09:31,663 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 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 14:09:31,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:09:31,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:31,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:31,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:31,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851980564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:31,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:31,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:09:31,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177413199] [2021-06-05 14:09:31,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:09:31,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:31,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:09:31,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:09:31,723 INFO L87 Difference]: Start difference. First operand 18797 states and 66264 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:31,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:31,955 INFO L93 Difference]: Finished difference Result 19410 states and 67835 transitions. [2021-06-05 14:09:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:09:31,956 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:31,986 INFO L225 Difference]: With dead ends: 19410 [2021-06-05 14:09:31,986 INFO L226 Difference]: Without dead ends: 19405 [2021-06-05 14:09:31,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=310, Invalid=620, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:09:31,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19405 states. [2021-06-05 14:09:32,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19405 to 18800. [2021-06-05 14:09:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18800 states, 18799 states have (on average 3.5254534815681686) internal successors, (66275), 18799 states have internal predecessors, (66275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:32,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18800 states to 18800 states and 66275 transitions. [2021-06-05 14:09:32,281 INFO L78 Accepts]: Start accepts. Automaton has 18800 states and 66275 transitions. Word has length 22 [2021-06-05 14:09:32,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:32,281 INFO L482 AbstractCegarLoop]: Abstraction has 18800 states and 66275 transitions. [2021-06-05 14:09:32,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:32,281 INFO L276 IsEmpty]: Start isEmpty. Operand 18800 states and 66275 transitions. [2021-06-05 14:09:32,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:32,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:32,287 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:32,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21532 [2021-06-05 14:09:32,487 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:32,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:32,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1076074742, now seen corresponding path program 167 times [2021-06-05 14:09:32,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:32,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253605251] [2021-06-05 14:09:32,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:32,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:32,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:32,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253605251] [2021-06-05 14:09:32,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253605251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:32,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861623943] [2021-06-05 14:09:32,551 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 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 14:09:32,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:09:32,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:32,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:32,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:32,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861623943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:32,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:32,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:09:32,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744829620] [2021-06-05 14:09:32,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:09:32,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:32,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:09:32,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:09:32,617 INFO L87 Difference]: Start difference. First operand 18800 states and 66275 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:32,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:32,791 INFO L93 Difference]: Finished difference Result 20745 states and 72560 transitions. [2021-06-05 14:09:32,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:09:32,791 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:32,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:32,828 INFO L225 Difference]: With dead ends: 20745 [2021-06-05 14:09:32,828 INFO L226 Difference]: Without dead ends: 20745 [2021-06-05 14:09:32,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:09:32,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20745 states. [2021-06-05 14:09:33,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20745 to 19637. [2021-06-05 14:09:33,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19637 states, 19636 states have (on average 3.5308616826237524) internal successors, (69332), 19636 states have internal predecessors, (69332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:33,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19637 states to 19637 states and 69332 transitions. [2021-06-05 14:09:33,185 INFO L78 Accepts]: Start accepts. Automaton has 19637 states and 69332 transitions. Word has length 22 [2021-06-05 14:09:33,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:33,185 INFO L482 AbstractCegarLoop]: Abstraction has 19637 states and 69332 transitions. [2021-06-05 14:09:33,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:33,185 INFO L276 IsEmpty]: Start isEmpty. Operand 19637 states and 69332 transitions. [2021-06-05 14:09:33,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:33,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:33,191 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:33,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21533 [2021-06-05 14:09:33,391 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:33,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:33,392 INFO L82 PathProgramCache]: Analyzing trace with hash 243062425, now seen corresponding path program 168 times [2021-06-05 14:09:33,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:33,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601935550] [2021-06-05 14:09:33,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:33,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:33,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601935550] [2021-06-05 14:09:33,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601935550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:33,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164936362] [2021-06-05 14:09:33,473 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 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 14:09:33,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:09:33,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:33,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:33,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:33,537 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:33,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164936362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:33,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:33,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:09:33,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417267275] [2021-06-05 14:09:33,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:09:33,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:33,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:09:33,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:09:33,537 INFO L87 Difference]: Start difference. First operand 19637 states and 69332 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:33,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:33,771 INFO L93 Difference]: Finished difference Result 20239 states and 70880 transitions. [2021-06-05 14:09:33,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:09:33,772 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:33,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:33,806 INFO L225 Difference]: With dead ends: 20239 [2021-06-05 14:09:33,806 INFO L226 Difference]: Without dead ends: 20233 [2021-06-05 14:09:33,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 158.5ms TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:09:33,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20233 states. [2021-06-05 14:09:34,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20233 to 19639. [2021-06-05 14:09:34,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19639 states, 19638 states have (on average 3.530858539566147) internal successors, (69339), 19638 states have internal predecessors, (69339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:34,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19639 states to 19639 states and 69339 transitions. [2021-06-05 14:09:34,147 INFO L78 Accepts]: Start accepts. Automaton has 19639 states and 69339 transitions. Word has length 22 [2021-06-05 14:09:34,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:34,148 INFO L482 AbstractCegarLoop]: Abstraction has 19639 states and 69339 transitions. [2021-06-05 14:09:34,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:34,148 INFO L276 IsEmpty]: Start isEmpty. Operand 19639 states and 69339 transitions. [2021-06-05 14:09:34,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:34,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:34,154 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:34,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21534 [2021-06-05 14:09:34,354 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:34,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:34,354 INFO L82 PathProgramCache]: Analyzing trace with hash 407060196, now seen corresponding path program 169 times [2021-06-05 14:09:34,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:34,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334817695] [2021-06-05 14:09:34,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:34,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:34,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334817695] [2021-06-05 14:09:34,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334817695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:34,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049632239] [2021-06-05 14:09:34,531 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 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 14:09:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:34,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:34,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:34,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049632239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:34,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:34,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:09:34,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467186435] [2021-06-05 14:09:34,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:09:34,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:34,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:09:34,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:09:34,607 INFO L87 Difference]: Start difference. First operand 19639 states and 69339 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:34,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:34,868 INFO L93 Difference]: Finished difference Result 20573 states and 71871 transitions. [2021-06-05 14:09:34,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:09:34,869 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:34,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:34,910 INFO L225 Difference]: With dead ends: 20573 [2021-06-05 14:09:34,910 INFO L226 Difference]: Without dead ends: 20573 [2021-06-05 14:09:34,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 187.9ms TimeCoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:09:34,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20573 states. [2021-06-05 14:09:35,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20573 to 19777. [2021-06-05 14:09:35,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19777 states, 19776 states have (on average 3.531806229773463) internal successors, (69845), 19776 states have internal predecessors, (69845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:35,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19777 states to 19777 states and 69845 transitions. [2021-06-05 14:09:35,274 INFO L78 Accepts]: Start accepts. Automaton has 19777 states and 69845 transitions. Word has length 22 [2021-06-05 14:09:35,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:35,274 INFO L482 AbstractCegarLoop]: Abstraction has 19777 states and 69845 transitions. [2021-06-05 14:09:35,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:35,274 INFO L276 IsEmpty]: Start isEmpty. Operand 19777 states and 69845 transitions. [2021-06-05 14:09:35,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:35,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:35,280 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:35,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21535 [2021-06-05 14:09:35,481 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:35,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:35,481 INFO L82 PathProgramCache]: Analyzing trace with hash -601909027, now seen corresponding path program 170 times [2021-06-05 14:09:35,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:35,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461373702] [2021-06-05 14:09:35,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:35,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:35,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461373702] [2021-06-05 14:09:35,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461373702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:35,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857099918] [2021-06-05 14:09:35,561 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 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 14:09:35,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:09:35,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:35,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:35,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:35,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857099918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:35,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:35,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:09:35,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690819555] [2021-06-05 14:09:35,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:09:35,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:35,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:09:35,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:09:35,626 INFO L87 Difference]: Start difference. First operand 19777 states and 69845 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:35,890 INFO L93 Difference]: Finished difference Result 20348 states and 71343 transitions. [2021-06-05 14:09:35,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:09:35,891 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:35,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:35,929 INFO L225 Difference]: With dead ends: 20348 [2021-06-05 14:09:35,929 INFO L226 Difference]: Without dead ends: 20341 [2021-06-05 14:09:35,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:09:35,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20341 states. [2021-06-05 14:09:36,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20341 to 19792. [2021-06-05 14:09:36,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19792 states, 19791 states have (on average 3.5310494669294124) internal successors, (69883), 19791 states have internal predecessors, (69883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:36,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19792 states to 19792 states and 69883 transitions. [2021-06-05 14:09:36,409 INFO L78 Accepts]: Start accepts. Automaton has 19792 states and 69883 transitions. Word has length 22 [2021-06-05 14:09:36,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:36,409 INFO L482 AbstractCegarLoop]: Abstraction has 19792 states and 69883 transitions. [2021-06-05 14:09:36,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:36,409 INFO L276 IsEmpty]: Start isEmpty. Operand 19792 states and 69883 transitions. [2021-06-05 14:09:36,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:36,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:36,416 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:36,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21536,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:36,617 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:36,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:36,617 INFO L82 PathProgramCache]: Analyzing trace with hash -860396982, now seen corresponding path program 171 times [2021-06-05 14:09:36,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:36,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752256796] [2021-06-05 14:09:36,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:36,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:36,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752256796] [2021-06-05 14:09:36,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752256796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:36,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869999108] [2021-06-05 14:09:36,689 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 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 14:09:36,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:09:36,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:36,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:36,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:36,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869999108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:36,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:36,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:09:36,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446049378] [2021-06-05 14:09:36,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:09:36,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:36,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:09:36,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:09:36,758 INFO L87 Difference]: Start difference. First operand 19792 states and 69883 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:37,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:37,197 INFO L93 Difference]: Finished difference Result 21105 states and 73563 transitions. [2021-06-05 14:09:37,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 14:09:37,208 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:37,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:37,251 INFO L225 Difference]: With dead ends: 21105 [2021-06-05 14:09:37,252 INFO L226 Difference]: Without dead ends: 21105 [2021-06-05 14:09:37,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 328.7ms TimeCoverageRelationStatistics Valid=644, Invalid=1248, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:09:37,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21105 states. [2021-06-05 14:09:37,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21105 to 20568. [2021-06-05 14:09:37,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20568 states, 20567 states have (on average 3.529051393008217) internal successors, (72582), 20567 states have internal predecessors, (72582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:37,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20568 states to 20568 states and 72582 transitions. [2021-06-05 14:09:37,638 INFO L78 Accepts]: Start accepts. Automaton has 20568 states and 72582 transitions. Word has length 22 [2021-06-05 14:09:37,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:37,638 INFO L482 AbstractCegarLoop]: Abstraction has 20568 states and 72582 transitions. [2021-06-05 14:09:37,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:37,638 INFO L276 IsEmpty]: Start isEmpty. Operand 20568 states and 72582 transitions. [2021-06-05 14:09:37,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:37,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:37,644 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:37,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21537,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:37,845 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:37,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:37,845 INFO L82 PathProgramCache]: Analyzing trace with hash 860487385, now seen corresponding path program 172 times [2021-06-05 14:09:37,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:37,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516765866] [2021-06-05 14:09:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:09:37,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:37,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516765866] [2021-06-05 14:09:37,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516765866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:37,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759768033] [2021-06-05 14:09:37,893 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 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 14:09:37,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:09:37,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:37,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:37,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 43 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:09:37,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759768033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:37,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:37,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:09:37,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240405666] [2021-06-05 14:09:37,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:09:37,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:37,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:09:37,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:09:37,957 INFO L87 Difference]: Start difference. First operand 20568 states and 72582 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:38,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:38,184 INFO L93 Difference]: Finished difference Result 20897 states and 73323 transitions. [2021-06-05 14:09:38,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:09:38,185 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:09:38,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:38,220 INFO L225 Difference]: With dead ends: 20897 [2021-06-05 14:09:38,220 INFO L226 Difference]: Without dead ends: 20897 [2021-06-05 14:09:38,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:09:38,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20897 states. [2021-06-05 14:09:38,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20897 to 20632. [2021-06-05 14:09:38,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20632 states, 20631 states have (on average 3.527991856914352) internal successors, (72786), 20631 states have internal predecessors, (72786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:38,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20632 states to 20632 states and 72786 transitions. [2021-06-05 14:09:38,557 INFO L78 Accepts]: Start accepts. Automaton has 20632 states and 72786 transitions. Word has length 22 [2021-06-05 14:09:38,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:38,558 INFO L482 AbstractCegarLoop]: Abstraction has 20632 states and 72786 transitions. [2021-06-05 14:09:38,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:38,558 INFO L276 IsEmpty]: Start isEmpty. Operand 20632 states and 72786 transitions. [2021-06-05 14:09:38,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:38,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:38,564 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:38,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21538,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:38,764 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:38,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:38,765 INFO L82 PathProgramCache]: Analyzing trace with hash 82743140, now seen corresponding path program 173 times [2021-06-05 14:09:38,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:38,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266386972] [2021-06-05 14:09:38,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:09:38,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:38,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266386972] [2021-06-05 14:09:38,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266386972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:38,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805696243] [2021-06-05 14:09:38,810 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 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 14:09:38,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:09:38,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:38,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:38,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:09:38,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805696243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:38,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:38,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:09:38,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853043908] [2021-06-05 14:09:38,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:09:38,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:38,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:09:38,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:09:38,867 INFO L87 Difference]: Start difference. First operand 20632 states and 72786 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:39,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:39,114 INFO L93 Difference]: Finished difference Result 25212 states and 88754 transitions. [2021-06-05 14:09:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:09:39,115 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:09:39,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:39,168 INFO L225 Difference]: With dead ends: 25212 [2021-06-05 14:09:39,168 INFO L226 Difference]: Without dead ends: 25208 [2021-06-05 14:09:39,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:09:39,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25208 states. [2021-06-05 14:09:39,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25208 to 23517. [2021-06-05 14:09:39,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23517 states, 23516 states have (on average 3.5353376424562) internal successors, (83137), 23516 states have internal predecessors, (83137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:39,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23517 states to 23517 states and 83137 transitions. [2021-06-05 14:09:39,794 INFO L78 Accepts]: Start accepts. Automaton has 23517 states and 83137 transitions. Word has length 22 [2021-06-05 14:09:39,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:39,794 INFO L482 AbstractCegarLoop]: Abstraction has 23517 states and 83137 transitions. [2021-06-05 14:09:39,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:39,794 INFO L276 IsEmpty]: Start isEmpty. Operand 23517 states and 83137 transitions. [2021-06-05 14:09:39,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:39,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:39,802 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:40,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21539,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:40,003 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:40,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:40,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1746631591, now seen corresponding path program 174 times [2021-06-05 14:09:40,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:40,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967252790] [2021-06-05 14:09:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:40,056 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:40,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:40,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967252790] [2021-06-05 14:09:40,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967252790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:40,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134758896] [2021-06-05 14:09:40,056 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 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 14:09:40,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:09:40,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:40,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:40,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:09:40,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134758896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:40,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:40,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:09:40,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834569178] [2021-06-05 14:09:40,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:09:40,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:40,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:09:40,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:09:40,113 INFO L87 Difference]: Start difference. First operand 23517 states and 83137 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:40,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:40,333 INFO L93 Difference]: Finished difference Result 23865 states and 84038 transitions. [2021-06-05 14:09:40,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:09:40,333 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:09:40,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:40,374 INFO L225 Difference]: With dead ends: 23865 [2021-06-05 14:09:40,374 INFO L226 Difference]: Without dead ends: 23861 [2021-06-05 14:09:40,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:09:40,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23861 states. [2021-06-05 14:09:40,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23861 to 23517. [2021-06-05 14:09:40,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23517 states, 23516 states have (on average 3.535252593978568) internal successors, (83135), 23516 states have internal predecessors, (83135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:40,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23517 states to 23517 states and 83135 transitions. [2021-06-05 14:09:40,765 INFO L78 Accepts]: Start accepts. Automaton has 23517 states and 83135 transitions. Word has length 22 [2021-06-05 14:09:40,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:40,765 INFO L482 AbstractCegarLoop]: Abstraction has 23517 states and 83135 transitions. [2021-06-05 14:09:40,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:40,765 INFO L276 IsEmpty]: Start isEmpty. Operand 23517 states and 83135 transitions. [2021-06-05 14:09:40,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:40,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:40,771 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:40,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21540 [2021-06-05 14:09:40,972 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:40,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:40,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1908230044, now seen corresponding path program 175 times [2021-06-05 14:09:40,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:40,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373180405] [2021-06-05 14:09:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:41,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:41,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373180405] [2021-06-05 14:09:41,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373180405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:41,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319014179] [2021-06-05 14:09:41,022 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 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 14:09:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:41,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:41,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:09:41,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319014179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:41,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:41,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:09:41,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111570919] [2021-06-05 14:09:41,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:09:41,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:41,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:09:41,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:09:41,081 INFO L87 Difference]: Start difference. First operand 23517 states and 83135 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:41,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:41,460 INFO L93 Difference]: Finished difference Result 26766 states and 93606 transitions. [2021-06-05 14:09:41,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:09:41,460 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:09:41,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:41,506 INFO L225 Difference]: With dead ends: 26766 [2021-06-05 14:09:41,506 INFO L226 Difference]: Without dead ends: 26766 [2021-06-05 14:09:41,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:09:41,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26766 states. [2021-06-05 14:09:41,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26766 to 26009. [2021-06-05 14:09:41,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26009 states, 26008 states have (on average 3.535912027068594) internal successors, (91962), 26008 states have internal predecessors, (91962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26009 states to 26009 states and 91962 transitions. [2021-06-05 14:09:41,939 INFO L78 Accepts]: Start accepts. Automaton has 26009 states and 91962 transitions. Word has length 22 [2021-06-05 14:09:41,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:41,939 INFO L482 AbstractCegarLoop]: Abstraction has 26009 states and 91962 transitions. [2021-06-05 14:09:41,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:41,939 INFO L276 IsEmpty]: Start isEmpty. Operand 26009 states and 91962 transitions. [2021-06-05 14:09:41,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:41,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:41,946 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:42,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21541 [2021-06-05 14:09:42,146 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:42,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:42,147 INFO L82 PathProgramCache]: Analyzing trace with hash -263496653, now seen corresponding path program 176 times [2021-06-05 14:09:42,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:42,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993585247] [2021-06-05 14:09:42,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:42,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:42,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993585247] [2021-06-05 14:09:42,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993585247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:42,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390956899] [2021-06-05 14:09:42,203 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 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 14:09:42,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:09:42,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:42,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:42,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:42,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390956899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:42,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:42,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:09:42,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500397634] [2021-06-05 14:09:42,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:09:42,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:42,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:09:42,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:09:42,258 INFO L87 Difference]: Start difference. First operand 26009 states and 91962 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:42,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:42,478 INFO L93 Difference]: Finished difference Result 26395 states and 92871 transitions. [2021-06-05 14:09:42,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:09:42,479 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:09:42,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:42,534 INFO L225 Difference]: With dead ends: 26395 [2021-06-05 14:09:42,534 INFO L226 Difference]: Without dead ends: 26391 [2021-06-05 14:09:42,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:09:42,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26391 states. [2021-06-05 14:09:43,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26391 to 26009. [2021-06-05 14:09:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26009 states, 26008 states have (on average 3.5357582282374653) internal successors, (91958), 26008 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 14:09:43,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26009 states to 26009 states and 91958 transitions. [2021-06-05 14:09:43,117 INFO L78 Accepts]: Start accepts. Automaton has 26009 states and 91958 transitions. Word has length 22 [2021-06-05 14:09:43,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:43,117 INFO L482 AbstractCegarLoop]: Abstraction has 26009 states and 91958 transitions. [2021-06-05 14:09:43,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:43,117 INFO L276 IsEmpty]: Start isEmpty. Operand 26009 states and 91958 transitions. [2021-06-05 14:09:43,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:43,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:43,124 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:43,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21542 [2021-06-05 14:09:43,324 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:43,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:43,324 INFO L82 PathProgramCache]: Analyzing trace with hash -425095106, now seen corresponding path program 177 times [2021-06-05 14:09:43,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:43,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695337557] [2021-06-05 14:09:43,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:43,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:43,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695337557] [2021-06-05 14:09:43,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695337557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:43,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041153913] [2021-06-05 14:09:43,380 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 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 14:09:43,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:09:43,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:43,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:43,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:43,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041153913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:43,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:43,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:09:43,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185279381] [2021-06-05 14:09:43,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:09:43,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:43,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:09:43,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:09:43,442 INFO L87 Difference]: Start difference. First operand 26009 states and 91958 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:43,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:43,664 INFO L93 Difference]: Finished difference Result 28931 states and 100786 transitions. [2021-06-05 14:09:43,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:09:43,665 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:09:43,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:43,720 INFO L225 Difference]: With dead ends: 28931 [2021-06-05 14:09:43,721 INFO L226 Difference]: Without dead ends: 28931 [2021-06-05 14:09:43,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:09:43,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28931 states. [2021-06-05 14:09:44,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28931 to 25132. [2021-06-05 14:09:44,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25132 states, 25131 states have (on average 3.5305399705542957) internal successors, (88726), 25131 states have internal predecessors, (88726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:44,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25132 states to 25132 states and 88726 transitions. [2021-06-05 14:09:44,376 INFO L78 Accepts]: Start accepts. Automaton has 25132 states and 88726 transitions. Word has length 22 [2021-06-05 14:09:44,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:44,376 INFO L482 AbstractCegarLoop]: Abstraction has 25132 states and 88726 transitions. [2021-06-05 14:09:44,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:44,377 INFO L276 IsEmpty]: Start isEmpty. Operand 25132 states and 88726 transitions. [2021-06-05 14:09:44,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:44,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:44,383 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:44,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21543 [2021-06-05 14:09:44,589 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:44,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:44,589 INFO L82 PathProgramCache]: Analyzing trace with hash 830594935, now seen corresponding path program 178 times [2021-06-05 14:09:44,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:44,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984266576] [2021-06-05 14:09:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:44,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:44,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984266576] [2021-06-05 14:09:44,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984266576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:44,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557423415] [2021-06-05 14:09:44,649 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 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 14:09:44,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:09:44,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:44,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:44,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:44,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557423415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:44,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:44,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:09:44,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179546380] [2021-06-05 14:09:44,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:09:44,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:44,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:09:44,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:09:44,704 INFO L87 Difference]: Start difference. First operand 25132 states and 88726 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:44,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:44,964 INFO L93 Difference]: Finished difference Result 25641 states and 90061 transitions. [2021-06-05 14:09:44,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:09:44,965 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:09:44,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:45,025 INFO L225 Difference]: With dead ends: 25641 [2021-06-05 14:09:45,025 INFO L226 Difference]: Without dead ends: 25636 [2021-06-05 14:09:45,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:09:45,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25636 states. [2021-06-05 14:09:45,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25636 to 25153. [2021-06-05 14:09:45,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25153 states, 25152 states have (on average 3.530017493638677) internal successors, (88787), 25152 states have internal predecessors, (88787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25153 states to 25153 states and 88787 transitions. [2021-06-05 14:09:45,704 INFO L78 Accepts]: Start accepts. Automaton has 25153 states and 88787 transitions. Word has length 22 [2021-06-05 14:09:45,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:45,704 INFO L482 AbstractCegarLoop]: Abstraction has 25153 states and 88787 transitions. [2021-06-05 14:09:45,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:45,704 INFO L276 IsEmpty]: Start isEmpty. Operand 25153 states and 88787 transitions. [2021-06-05 14:09:45,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:45,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:45,711 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:45,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21544 [2021-06-05 14:09:45,911 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:45,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:45,912 INFO L82 PathProgramCache]: Analyzing trace with hash -931441372, now seen corresponding path program 179 times [2021-06-05 14:09:45,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:45,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830639923] [2021-06-05 14:09:45,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:45,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:45,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830639923] [2021-06-05 14:09:45,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830639923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:45,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129187414] [2021-06-05 14:09:45,968 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 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 14:09:45,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:09:45,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:45,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:45,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:46,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129187414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:46,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:46,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:09:46,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159174932] [2021-06-05 14:09:46,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:09:46,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:46,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:09:46,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:09:46,030 INFO L87 Difference]: Start difference. First operand 25153 states and 88787 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:46,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:46,301 INFO L93 Difference]: Finished difference Result 28403 states and 99337 transitions. [2021-06-05 14:09:46,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:09:46,304 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:09:46,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:46,368 INFO L225 Difference]: With dead ends: 28403 [2021-06-05 14:09:46,368 INFO L226 Difference]: Without dead ends: 28403 [2021-06-05 14:09:46,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=302, Invalid=568, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:09:46,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28403 states. [2021-06-05 14:09:46,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28403 to 27756. [2021-06-05 14:09:46,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27756 states, 27755 states have (on average 3.5323365159430735) internal successors, (98040), 27755 states have internal predecessors, (98040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:46,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27756 states to 27756 states and 98040 transitions. [2021-06-05 14:09:46,877 INFO L78 Accepts]: Start accepts. Automaton has 27756 states and 98040 transitions. Word has length 22 [2021-06-05 14:09:46,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:46,877 INFO L482 AbstractCegarLoop]: Abstraction has 27756 states and 98040 transitions. [2021-06-05 14:09:46,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:46,877 INFO L276 IsEmpty]: Start isEmpty. Operand 27756 states and 98040 transitions. [2021-06-05 14:09:46,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:46,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:46,884 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:47,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21545 [2021-06-05 14:09:47,085 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:47,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:47,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1530953831, now seen corresponding path program 180 times [2021-06-05 14:09:47,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:47,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134637306] [2021-06-05 14:09:47,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:47,329 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 14:09:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:47,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:47,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134637306] [2021-06-05 14:09:47,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134637306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:47,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779580095] [2021-06-05 14:09:47,348 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 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 14:09:47,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:09:47,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:47,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:47,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 22 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:47,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779580095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:47,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:47,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:09:47,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445766443] [2021-06-05 14:09:47,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:09:47,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:47,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:09:47,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:09:47,404 INFO L87 Difference]: Start difference. First operand 27756 states and 98040 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:47,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:47,657 INFO L93 Difference]: Finished difference Result 28254 states and 99257 transitions. [2021-06-05 14:09:47,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:09:47,657 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:47,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:47,714 INFO L225 Difference]: With dead ends: 28254 [2021-06-05 14:09:47,715 INFO L226 Difference]: Without dead ends: 28250 [2021-06-05 14:09:47,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 322.5ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:09:47,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28250 states. [2021-06-05 14:09:48,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28250 to 27756. [2021-06-05 14:09:48,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27756 states, 27755 states have (on average 3.5321203386777156) internal successors, (98034), 27755 states have internal predecessors, (98034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:48,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27756 states to 27756 states and 98034 transitions. [2021-06-05 14:09:48,237 INFO L78 Accepts]: Start accepts. Automaton has 27756 states and 98034 transitions. Word has length 22 [2021-06-05 14:09:48,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:48,237 INFO L482 AbstractCegarLoop]: Abstraction has 27756 states and 98034 transitions. [2021-06-05 14:09:48,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:48,237 INFO L276 IsEmpty]: Start isEmpty. Operand 27756 states and 98034 transitions. [2021-06-05 14:09:48,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:48,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:48,245 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:48,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21546,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:48,461 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:48,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:48,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1692552284, now seen corresponding path program 181 times [2021-06-05 14:09:48,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:48,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029860675] [2021-06-05 14:09:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:48,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:48,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029860675] [2021-06-05 14:09:48,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029860675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:48,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532585818] [2021-06-05 14:09:48,538 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 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 14:09:48,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:48,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:48,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:48,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532585818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:48,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:48,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:09:48,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925082357] [2021-06-05 14:09:48,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:09:48,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:48,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:09:48,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:09:48,598 INFO L87 Difference]: Start difference. First operand 27756 states and 98034 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:48,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:48,953 INFO L93 Difference]: Finished difference Result 30857 states and 107254 transitions. [2021-06-05 14:09:48,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:09:48,954 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:48,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:49,015 INFO L225 Difference]: With dead ends: 30857 [2021-06-05 14:09:49,016 INFO L226 Difference]: Without dead ends: 30857 [2021-06-05 14:09:49,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=235, Invalid=415, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:09:49,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30857 states. [2021-06-05 14:09:49,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30857 to 22798. [2021-06-05 14:09:49,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22798 states, 22797 states have (on average 3.5037943589068736) internal successors, (79876), 22797 states have internal predecessors, (79876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:49,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22798 states to 22798 states and 79876 transitions. [2021-06-05 14:09:49,481 INFO L78 Accepts]: Start accepts. Automaton has 22798 states and 79876 transitions. Word has length 22 [2021-06-05 14:09:49,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:49,481 INFO L482 AbstractCegarLoop]: Abstraction has 22798 states and 79876 transitions. [2021-06-05 14:09:49,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:49,481 INFO L276 IsEmpty]: Start isEmpty. Operand 22798 states and 79876 transitions. [2021-06-05 14:09:49,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:49,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:49,488 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:49,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21547 [2021-06-05 14:09:49,688 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:49,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:49,689 INFO L82 PathProgramCache]: Analyzing trace with hash -436862243, now seen corresponding path program 182 times [2021-06-05 14:09:49,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:49,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939220706] [2021-06-05 14:09:49,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:49,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:49,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939220706] [2021-06-05 14:09:49,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939220706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:49,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082933196] [2021-06-05 14:09:49,752 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 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 14:09:49,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:09:49,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:49,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:49,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:49,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082933196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:49,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:49,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:09:49,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905827097] [2021-06-05 14:09:49,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:09:49,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:49,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:09:49,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:09:49,809 INFO L87 Difference]: Start difference. First operand 22798 states and 79876 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:50,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:50,088 INFO L93 Difference]: Finished difference Result 23497 states and 81715 transitions. [2021-06-05 14:09:50,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:09:50,088 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:50,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:50,130 INFO L225 Difference]: With dead ends: 23497 [2021-06-05 14:09:50,130 INFO L226 Difference]: Without dead ends: 23492 [2021-06-05 14:09:50,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 154.6ms TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:09:50,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23492 states. [2021-06-05 14:09:50,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23492 to 22804. [2021-06-05 14:09:50,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22804 states, 22803 states have (on average 3.5038810682804895) internal successors, (79899), 22803 states have internal predecessors, (79899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22804 states to 22804 states and 79899 transitions. [2021-06-05 14:09:50,586 INFO L78 Accepts]: Start accepts. Automaton has 22804 states and 79899 transitions. Word has length 22 [2021-06-05 14:09:50,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:50,586 INFO L482 AbstractCegarLoop]: Abstraction has 22804 states and 79899 transitions. [2021-06-05 14:09:50,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:50,586 INFO L276 IsEmpty]: Start isEmpty. Operand 22804 states and 79899 transitions. [2021-06-05 14:09:50,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:50,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:50,593 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:50,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21548,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:50,793 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:50,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:50,794 INFO L82 PathProgramCache]: Analyzing trace with hash 2096068746, now seen corresponding path program 183 times [2021-06-05 14:09:50,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:50,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620577515] [2021-06-05 14:09:50,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:50,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:50,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620577515] [2021-06-05 14:09:50,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620577515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:50,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806877553] [2021-06-05 14:09:50,854 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 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 14:09:50,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:09:50,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:50,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:50,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:50,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806877553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:50,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:50,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:09:50,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325176734] [2021-06-05 14:09:50,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:09:50,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:50,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:09:50,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:09:50,914 INFO L87 Difference]: Start difference. First operand 22804 states and 79899 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:51,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:51,160 INFO L93 Difference]: Finished difference Result 26246 states and 91100 transitions. [2021-06-05 14:09:51,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:09:51,161 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:51,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:51,214 INFO L225 Difference]: With dead ends: 26246 [2021-06-05 14:09:51,214 INFO L226 Difference]: Without dead ends: 26246 [2021-06-05 14:09:51,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:09:51,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26246 states. [2021-06-05 14:09:51,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26246 to 22958. [2021-06-05 14:09:51,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22958 states, 22957 states have (on average 3.504072831816004) internal successors, (80443), 22957 states have internal predecessors, (80443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:51,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22958 states to 22958 states and 80443 transitions. [2021-06-05 14:09:51,716 INFO L78 Accepts]: Start accepts. Automaton has 22958 states and 80443 transitions. Word has length 22 [2021-06-05 14:09:51,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:51,716 INFO L482 AbstractCegarLoop]: Abstraction has 22958 states and 80443 transitions. [2021-06-05 14:09:51,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:51,717 INFO L276 IsEmpty]: Start isEmpty. Operand 22958 states and 80443 transitions. [2021-06-05 14:09:51,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:51,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:51,723 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:51,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21549,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:51,923 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:51,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:51,924 INFO L82 PathProgramCache]: Analyzing trace with hash -879761383, now seen corresponding path program 184 times [2021-06-05 14:09:51,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:51,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646260624] [2021-06-05 14:09:51,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:51,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:51,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646260624] [2021-06-05 14:09:51,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646260624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:51,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647695720] [2021-06-05 14:09:51,996 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 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 14:09:52,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:09:52,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:52,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:52,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:52,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647695720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:52,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:52,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:09:52,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593538185] [2021-06-05 14:09:52,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:09:52,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:52,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:09:52,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:09:52,053 INFO L87 Difference]: Start difference. First operand 22958 states and 80443 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:52,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:52,331 INFO L93 Difference]: Finished difference Result 23615 states and 82201 transitions. [2021-06-05 14:09:52,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:09:52,332 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:52,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:52,374 INFO L225 Difference]: With dead ends: 23615 [2021-06-05 14:09:52,375 INFO L226 Difference]: Without dead ends: 23609 [2021-06-05 14:09:52,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 170.8ms TimeCoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:09:52,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23609 states. [2021-06-05 14:09:52,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23609 to 22976. [2021-06-05 14:09:52,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22976 states, 22975 states have (on average 3.503808487486398) internal successors, (80500), 22975 states have internal predecessors, (80500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:52,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22976 states to 22976 states and 80500 transitions. [2021-06-05 14:09:52,775 INFO L78 Accepts]: Start accepts. Automaton has 22976 states and 80500 transitions. Word has length 22 [2021-06-05 14:09:52,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:52,775 INFO L482 AbstractCegarLoop]: Abstraction has 22976 states and 80500 transitions. [2021-06-05 14:09:52,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:52,775 INFO L276 IsEmpty]: Start isEmpty. Operand 22976 states and 80500 transitions. [2021-06-05 14:09:52,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:52,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:52,782 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:52,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21550,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:52,982 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:52,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:52,982 INFO L82 PathProgramCache]: Analyzing trace with hash -715763612, now seen corresponding path program 185 times [2021-06-05 14:09:52,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:52,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951351658] [2021-06-05 14:09:52,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:53,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:53,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951351658] [2021-06-05 14:09:53,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951351658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:53,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3928861] [2021-06-05 14:09:53,048 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 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 14:09:53,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:09:53,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:53,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:53,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:53,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3928861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:53,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:53,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:09:53,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242742167] [2021-06-05 14:09:53,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:09:53,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:53,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:09:53,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:09:53,249 INFO L87 Difference]: Start difference. First operand 22976 states and 80500 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:53,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:53,571 INFO L93 Difference]: Finished difference Result 24953 states and 86530 transitions. [2021-06-05 14:09:53,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:09:53,572 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:53,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:53,625 INFO L225 Difference]: With dead ends: 24953 [2021-06-05 14:09:53,625 INFO L226 Difference]: Without dead ends: 24953 [2021-06-05 14:09:53,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 208.3ms TimeCoverageRelationStatistics Valid=454, Invalid=878, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:09:53,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24953 states. [2021-06-05 14:09:53,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24953 to 24405. [2021-06-05 14:09:54,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24405 states, 24404 states have (on average 3.5054499262416) internal successors, (85547), 24404 states have internal predecessors, (85547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:54,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24405 states to 24405 states and 85547 transitions. [2021-06-05 14:09:54,084 INFO L78 Accepts]: Start accepts. Automaton has 24405 states and 85547 transitions. Word has length 22 [2021-06-05 14:09:54,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:54,085 INFO L482 AbstractCegarLoop]: Abstraction has 24405 states and 85547 transitions. [2021-06-05 14:09:54,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:54,085 INFO L276 IsEmpty]: Start isEmpty. Operand 24405 states and 85547 transitions. [2021-06-05 14:09:54,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:54,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:54,091 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:54,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21551,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:54,292 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:54,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:54,292 INFO L82 PathProgramCache]: Analyzing trace with hash 2127546611, now seen corresponding path program 186 times [2021-06-05 14:09:54,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:54,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197234235] [2021-06-05 14:09:54,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:54,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:54,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197234235] [2021-06-05 14:09:54,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197234235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:54,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591466878] [2021-06-05 14:09:54,355 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 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 14:09:54,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:09:54,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:54,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:54,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:54,417 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:54,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591466878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:54,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:54,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:09:54,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082574142] [2021-06-05 14:09:54,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:09:54,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:54,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:09:54,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:09:54,417 INFO L87 Difference]: Start difference. First operand 24405 states and 85547 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:54,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:54,675 INFO L93 Difference]: Finished difference Result 24826 states and 86467 transitions. [2021-06-05 14:09:54,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:09:54,677 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:54,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:54,886 INFO L225 Difference]: With dead ends: 24826 [2021-06-05 14:09:54,886 INFO L226 Difference]: Without dead ends: 24822 [2021-06-05 14:09:54,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:09:54,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24822 states. [2021-06-05 14:09:55,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24822 to 24405. [2021-06-05 14:09:55,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24405 states, 24404 states have (on average 3.5052860186854615) internal successors, (85543), 24404 states have internal predecessors, (85543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:55,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24405 states to 24405 states and 85543 transitions. [2021-06-05 14:09:55,321 INFO L78 Accepts]: Start accepts. Automaton has 24405 states and 85543 transitions. Word has length 22 [2021-06-05 14:09:55,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:55,321 INFO L482 AbstractCegarLoop]: Abstraction has 24405 states and 85543 transitions. [2021-06-05 14:09:55,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:55,321 INFO L276 IsEmpty]: Start isEmpty. Operand 24405 states and 85543 transitions. [2021-06-05 14:09:55,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:55,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:55,328 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:55,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21552 [2021-06-05 14:09:55,528 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:55,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:55,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1965948158, now seen corresponding path program 187 times [2021-06-05 14:09:55,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:55,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863794317] [2021-06-05 14:09:55,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:55,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:55,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863794317] [2021-06-05 14:09:55,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863794317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:55,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160166863] [2021-06-05 14:09:55,590 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 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 14:09:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:55,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:55,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:55,653 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:55,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160166863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:55,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:55,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:09:55,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143796025] [2021-06-05 14:09:55,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:09:55,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:55,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:09:55,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:09:55,654 INFO L87 Difference]: Start difference. First operand 24405 states and 85543 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:55,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:55,860 INFO L93 Difference]: Finished difference Result 25900 states and 89533 transitions. [2021-06-05 14:09:55,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:09:55,861 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:55,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:55,912 INFO L225 Difference]: With dead ends: 25900 [2021-06-05 14:09:55,912 INFO L226 Difference]: Without dead ends: 25900 [2021-06-05 14:09:55,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:09:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25900 states. [2021-06-05 14:09:56,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25900 to 18287. [2021-06-05 14:09:56,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18287 states, 18286 states have (on average 3.4808596740675926) internal successors, (63651), 18286 states have internal predecessors, (63651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:56,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18287 states to 18287 states and 63651 transitions. [2021-06-05 14:09:56,390 INFO L78 Accepts]: Start accepts. Automaton has 18287 states and 63651 transitions. Word has length 22 [2021-06-05 14:09:56,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:56,390 INFO L482 AbstractCegarLoop]: Abstraction has 18287 states and 63651 transitions. [2021-06-05 14:09:56,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:56,390 INFO L276 IsEmpty]: Start isEmpty. Operand 18287 states and 63651 transitions. [2021-06-05 14:09:56,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:56,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:56,396 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:56,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21553,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:56,602 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:56,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:56,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1073329097, now seen corresponding path program 188 times [2021-06-05 14:09:56,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:56,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453987811] [2021-06-05 14:09:56,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:56,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:56,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453987811] [2021-06-05 14:09:56,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453987811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:56,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466951965] [2021-06-05 14:09:56,684 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 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 14:09:56,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:09:56,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:56,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:56,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:56,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466951965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:56,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:56,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:09:56,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495915281] [2021-06-05 14:09:56,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:09:56,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:56,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:09:56,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:09:56,746 INFO L87 Difference]: Start difference. First operand 18287 states and 63651 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:57,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:57,034 INFO L93 Difference]: Finished difference Result 19111 states and 65822 transitions. [2021-06-05 14:09:57,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:09:57,034 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:57,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:57,070 INFO L225 Difference]: With dead ends: 19111 [2021-06-05 14:09:57,070 INFO L226 Difference]: Without dead ends: 19106 [2021-06-05 14:09:57,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=330, Invalid=662, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:09:57,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19106 states. [2021-06-05 14:09:57,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19106 to 18296. [2021-06-05 14:09:57,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18296 states, 18295 states have (on average 3.4810057392730256) internal successors, (63685), 18295 states have internal predecessors, (63685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18296 states to 18296 states and 63685 transitions. [2021-06-05 14:09:57,413 INFO L78 Accepts]: Start accepts. Automaton has 18296 states and 63685 transitions. Word has length 22 [2021-06-05 14:09:57,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:57,413 INFO L482 AbstractCegarLoop]: Abstraction has 18296 states and 63685 transitions. [2021-06-05 14:09:57,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:57,414 INFO L276 IsEmpty]: Start isEmpty. Operand 18296 states and 63685 transitions. [2021-06-05 14:09:57,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:57,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:57,420 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:57,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21554 [2021-06-05 14:09:57,621 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:57,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:57,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1459601892, now seen corresponding path program 189 times [2021-06-05 14:09:57,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:57,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841246543] [2021-06-05 14:09:57,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:57,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:57,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841246543] [2021-06-05 14:09:57,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841246543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:57,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709318945] [2021-06-05 14:09:57,693 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 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 14:09:57,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:09:57,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:57,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:57,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:57,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709318945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:57,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:57,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:09:57,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061380871] [2021-06-05 14:09:57,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:09:57,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:57,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:09:57,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:09:57,764 INFO L87 Difference]: Start difference. First operand 18296 states and 63685 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:58,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:58,035 INFO L93 Difference]: Finished difference Result 22104 states and 76218 transitions. [2021-06-05 14:09:58,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:09:58,035 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:58,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:58,077 INFO L225 Difference]: With dead ends: 22104 [2021-06-05 14:09:58,077 INFO L226 Difference]: Without dead ends: 22104 [2021-06-05 14:09:58,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:09:58,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22104 states. [2021-06-05 14:09:58,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22104 to 17879. [2021-06-05 14:09:58,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17879 states, 17878 states have (on average 3.4820449714733193) internal successors, (62252), 17878 states have internal predecessors, (62252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:58,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17879 states to 17879 states and 62252 transitions. [2021-06-05 14:09:58,435 INFO L78 Accepts]: Start accepts. Automaton has 17879 states and 62252 transitions. Word has length 22 [2021-06-05 14:09:58,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:58,436 INFO L482 AbstractCegarLoop]: Abstraction has 17879 states and 62252 transitions. [2021-06-05 14:09:58,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:58,436 INFO L276 IsEmpty]: Start isEmpty. Operand 17879 states and 62252 transitions. [2021-06-05 14:09:58,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:58,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:58,442 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:58,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21555 [2021-06-05 14:09:58,657 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:58,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:58,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1516228237, now seen corresponding path program 190 times [2021-06-05 14:09:58,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:58,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872809464] [2021-06-05 14:09:58,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:58,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:58,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872809464] [2021-06-05 14:09:58,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872809464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:58,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423955560] [2021-06-05 14:09:58,731 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 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 14:09:58,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:09:58,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:58,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:58,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:58,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423955560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:58,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:58,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:09:58,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823970401] [2021-06-05 14:09:58,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:09:58,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:58,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:09:58,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:09:58,795 INFO L87 Difference]: Start difference. First operand 17879 states and 62252 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:59,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:59,062 INFO L93 Difference]: Finished difference Result 18689 states and 64378 transitions. [2021-06-05 14:09:59,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:09:59,062 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:09:59,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:59,097 INFO L225 Difference]: With dead ends: 18689 [2021-06-05 14:09:59,097 INFO L226 Difference]: Without dead ends: 18683 [2021-06-05 14:09:59,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=328, Invalid=664, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:09:59,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18683 states. [2021-06-05 14:09:59,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18683 to 17883. [2021-06-05 14:09:59,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17883 states, 17882 states have (on average 3.482104909965328) internal successors, (62267), 17882 states have internal predecessors, (62267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:59,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17883 states to 17883 states and 62267 transitions. [2021-06-05 14:09:59,562 INFO L78 Accepts]: Start accepts. Automaton has 17883 states and 62267 transitions. Word has length 22 [2021-06-05 14:09:59,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:59,562 INFO L482 AbstractCegarLoop]: Abstraction has 17883 states and 62267 transitions. [2021-06-05 14:09:59,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:59,562 INFO L276 IsEmpty]: Start isEmpty. Operand 17883 states and 62267 transitions. [2021-06-05 14:09:59,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:59,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:59,568 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:59,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21556,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:59,769 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:59,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1352230466, now seen corresponding path program 191 times [2021-06-05 14:09:59,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:59,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382762505] [2021-06-05 14:09:59,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:59,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:59,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382762505] [2021-06-05 14:09:59,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382762505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:59,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734064785] [2021-06-05 14:09:59,843 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 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 14:09:59,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:09:59,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:59,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:09:59,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:59,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734064785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:59,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:59,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:09:59,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093045373] [2021-06-05 14:09:59,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:09:59,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:59,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:09:59,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:09:59,911 INFO L87 Difference]: Start difference. First operand 17883 states and 62267 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:00,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:00,175 INFO L93 Difference]: Finished difference Result 19170 states and 65905 transitions. [2021-06-05 14:10:00,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:10:00,175 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:00,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:00,208 INFO L225 Difference]: With dead ends: 19170 [2021-06-05 14:10:00,208 INFO L226 Difference]: Without dead ends: 19170 [2021-06-05 14:10:00,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:10:00,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19170 states. [2021-06-05 14:10:00,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19170 to 17477. [2021-06-05 14:10:00,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.482776379034104) internal successors, (60865), 17476 states have internal predecessors, (60865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:00,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 60865 transitions. [2021-06-05 14:10:00,528 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 60865 transitions. Word has length 22 [2021-06-05 14:10:00,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:00,528 INFO L482 AbstractCegarLoop]: Abstraction has 17477 states and 60865 transitions. [2021-06-05 14:10:00,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:00,528 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 60865 transitions. [2021-06-05 14:10:00,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:00,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:00,534 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:00,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21557 [2021-06-05 14:10:00,749 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:00,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:00,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1933767607, now seen corresponding path program 192 times [2021-06-05 14:10:00,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:00,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6015441] [2021-06-05 14:10:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:00,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:00,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6015441] [2021-06-05 14:10:00,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6015441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:00,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109913858] [2021-06-05 14:10:00,819 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 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 14:10:00,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:10:00,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:00,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:00,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:00,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109913858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:00,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:00,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:00,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636781652] [2021-06-05 14:10:00,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:00,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:00,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:00,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:00,884 INFO L87 Difference]: Start difference. First operand 17477 states and 60865 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:01,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:01,158 INFO L93 Difference]: Finished difference Result 18240 states and 62909 transitions. [2021-06-05 14:10:01,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:10:01,158 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:01,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:01,194 INFO L225 Difference]: With dead ends: 18240 [2021-06-05 14:10:01,194 INFO L226 Difference]: Without dead ends: 18233 [2021-06-05 14:10:01,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 177.4ms TimeCoverageRelationStatistics Valid=328, Invalid=664, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:10:01,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18233 states. [2021-06-05 14:10:01,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18233 to 17495. [2021-06-05 14:10:01,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17495 states, 17494 states have (on average 3.4824511261003774) internal successors, (60922), 17494 states have internal predecessors, (60922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:01,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17495 states to 17495 states and 60922 transitions. [2021-06-05 14:10:01,676 INFO L78 Accepts]: Start accepts. Automaton has 17495 states and 60922 transitions. Word has length 22 [2021-06-05 14:10:01,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:01,676 INFO L482 AbstractCegarLoop]: Abstraction has 17495 states and 60922 transitions. [2021-06-05 14:10:01,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:01,676 INFO L276 IsEmpty]: Start isEmpty. Operand 17495 states and 60922 transitions. [2021-06-05 14:10:01,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:01,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:01,682 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:01,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21558,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:01,898 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:01,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:01,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1675279652, now seen corresponding path program 193 times [2021-06-05 14:10:01,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:01,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067479281] [2021-06-05 14:10:01,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:01,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:01,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067479281] [2021-06-05 14:10:01,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067479281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:01,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209111867] [2021-06-05 14:10:01,966 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 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 14:10:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:02,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:02,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:02,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209111867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:02,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:02,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:02,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797821515] [2021-06-05 14:10:02,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:02,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:02,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:02,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:02,051 INFO L87 Difference]: Start difference. First operand 17495 states and 60922 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:02,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:02,448 INFO L93 Difference]: Finished difference Result 18422 states and 63184 transitions. [2021-06-05 14:10:02,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 14:10:02,448 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:02,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:02,487 INFO L225 Difference]: With dead ends: 18422 [2021-06-05 14:10:02,487 INFO L226 Difference]: Without dead ends: 18422 [2021-06-05 14:10:02,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 287.0ms TimeCoverageRelationStatistics Valid=643, Invalid=1249, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:10:02,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18422 states. [2021-06-05 14:10:02,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18422 to 17443. [2021-06-05 14:10:02,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17443 states, 17442 states have (on average 3.4833161334709324) internal successors, (60756), 17442 states have internal predecessors, (60756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:02,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17443 states to 17443 states and 60756 transitions. [2021-06-05 14:10:02,833 INFO L78 Accepts]: Start accepts. Automaton has 17443 states and 60756 transitions. Word has length 22 [2021-06-05 14:10:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:02,833 INFO L482 AbstractCegarLoop]: Abstraction has 17443 states and 60756 transitions. [2021-06-05 14:10:02,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:02,833 INFO L276 IsEmpty]: Start isEmpty. Operand 17443 states and 60756 transitions. [2021-06-05 14:10:02,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:02,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:02,840 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:03,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21559,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:03,057 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:03,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:03,057 INFO L82 PathProgramCache]: Analyzing trace with hash 4885383, now seen corresponding path program 194 times [2021-06-05 14:10:03,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:03,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369560120] [2021-06-05 14:10:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:03,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:03,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369560120] [2021-06-05 14:10:03,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369560120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:03,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462764487] [2021-06-05 14:10:03,113 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 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 14:10:03,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:10:03,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:03,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:03,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:10:03,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462764487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:03,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:03,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:10:03,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794676355] [2021-06-05 14:10:03,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:10:03,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:03,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:10:03,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:10:03,174 INFO L87 Difference]: Start difference. First operand 17443 states and 60756 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:03,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:03,428 INFO L93 Difference]: Finished difference Result 17724 states and 61191 transitions. [2021-06-05 14:10:03,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:10:03,429 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:03,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:03,466 INFO L225 Difference]: With dead ends: 17724 [2021-06-05 14:10:03,466 INFO L226 Difference]: Without dead ends: 17724 [2021-06-05 14:10:03,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:10:03,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17724 states. [2021-06-05 14:10:03,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17724 to 17454. [2021-06-05 14:10:03,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17454 states, 17453 states have (on average 3.4828396264252564) internal successors, (60786), 17453 states have internal predecessors, (60786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:03,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17454 states to 17454 states and 60786 transitions. [2021-06-05 14:10:03,792 INFO L78 Accepts]: Start accepts. Automaton has 17454 states and 60786 transitions. Word has length 22 [2021-06-05 14:10:03,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:03,792 INFO L482 AbstractCegarLoop]: Abstraction has 17454 states and 60786 transitions. [2021-06-05 14:10:03,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:03,792 INFO L276 IsEmpty]: Start isEmpty. Operand 17454 states and 60786 transitions. [2021-06-05 14:10:03,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:03,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:03,799 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:04,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21560,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:04,015 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:04,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:04,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1088175516, now seen corresponding path program 195 times [2021-06-05 14:10:04,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:04,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243685804] [2021-06-05 14:10:04,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:04,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:04,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243685804] [2021-06-05 14:10:04,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243685804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:04,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495028877] [2021-06-05 14:10:04,070 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 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 14:10:04,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:10:04,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:04,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:04,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:10:04,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495028877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:04,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:04,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:10:04,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950821657] [2021-06-05 14:10:04,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:10:04,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:04,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:10:04,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:10:04,129 INFO L87 Difference]: Start difference. First operand 17454 states and 60786 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:04,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:04,336 INFO L93 Difference]: Finished difference Result 17701 states and 61136 transitions. [2021-06-05 14:10:04,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:10:04,336 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:04,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:04,371 INFO L225 Difference]: With dead ends: 17701 [2021-06-05 14:10:04,371 INFO L226 Difference]: Without dead ends: 17697 [2021-06-05 14:10:04,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:10:04,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17697 states. [2021-06-05 14:10:04,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17697 to 16993. [2021-06-05 14:10:04,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16993 states, 16992 states have (on average 3.480637947269303) internal successors, (59143), 16992 states have internal predecessors, (59143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16993 states to 16993 states and 59143 transitions. [2021-06-05 14:10:04,701 INFO L78 Accepts]: Start accepts. Automaton has 16993 states and 59143 transitions. Word has length 22 [2021-06-05 14:10:04,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:04,702 INFO L482 AbstractCegarLoop]: Abstraction has 16993 states and 59143 transitions. [2021-06-05 14:10:04,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:04,702 INFO L276 IsEmpty]: Start isEmpty. Operand 16993 states and 59143 transitions. [2021-06-05 14:10:04,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:04,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:04,708 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:04,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21561 [2021-06-05 14:10:04,925 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:04,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:04,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1744977693, now seen corresponding path program 196 times [2021-06-05 14:10:04,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:04,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579717611] [2021-06-05 14:10:04,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:04,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:04,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579717611] [2021-06-05 14:10:04,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579717611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:04,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693112558] [2021-06-05 14:10:04,986 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 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 14:10:05,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:10:05,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:05,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:05,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:05,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693112558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:05,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:05,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:10:05,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143573206] [2021-06-05 14:10:05,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:10:05,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:05,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:10:05,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:10:05,162 INFO L87 Difference]: Start difference. First operand 16993 states and 59143 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:05,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:05,389 INFO L93 Difference]: Finished difference Result 17251 states and 59526 transitions. [2021-06-05 14:10:05,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:10:05,390 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:05,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:05,427 INFO L225 Difference]: With dead ends: 17251 [2021-06-05 14:10:05,427 INFO L226 Difference]: Without dead ends: 17250 [2021-06-05 14:10:05,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:10:05,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17250 states. [2021-06-05 14:10:05,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17250 to 16993. [2021-06-05 14:10:05,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16993 states, 16992 states have (on average 3.4791666666666665) internal successors, (59118), 16992 states have internal predecessors, (59118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:05,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16993 states to 16993 states and 59118 transitions. [2021-06-05 14:10:05,767 INFO L78 Accepts]: Start accepts. Automaton has 16993 states and 59118 transitions. Word has length 22 [2021-06-05 14:10:05,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:05,767 INFO L482 AbstractCegarLoop]: Abstraction has 16993 states and 59118 transitions. [2021-06-05 14:10:05,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:05,767 INFO L276 IsEmpty]: Start isEmpty. Operand 16993 states and 59118 transitions. [2021-06-05 14:10:05,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:05,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:05,773 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:05,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21562 [2021-06-05 14:10:05,991 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:05,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:05,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1627570870, now seen corresponding path program 197 times [2021-06-05 14:10:05,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:05,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913760362] [2021-06-05 14:10:05,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:06,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:06,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913760362] [2021-06-05 14:10:06,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913760362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:06,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245928698] [2021-06-05 14:10:06,156 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 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 14:10:06,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:10:06,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:06,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:06,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:06,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245928698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:06,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:06,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:10:06,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412558320] [2021-06-05 14:10:06,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:10:06,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:06,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:10:06,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:10:06,219 INFO L87 Difference]: Start difference. First operand 16993 states and 59118 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:06,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:06,361 INFO L93 Difference]: Finished difference Result 17351 states and 59762 transitions. [2021-06-05 14:10:06,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:10:06,362 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:06,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:06,401 INFO L225 Difference]: With dead ends: 17351 [2021-06-05 14:10:06,401 INFO L226 Difference]: Without dead ends: 17351 [2021-06-05 14:10:06,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:10:06,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17351 states. [2021-06-05 14:10:06,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17351 to 17008. [2021-06-05 14:10:06,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17008 states, 17007 states have (on average 3.477744458164285) internal successors, (59146), 17007 states have internal predecessors, (59146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:06,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17008 states to 17008 states and 59146 transitions. [2021-06-05 14:10:06,915 INFO L78 Accepts]: Start accepts. Automaton has 17008 states and 59146 transitions. Word has length 22 [2021-06-05 14:10:06,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:06,915 INFO L482 AbstractCegarLoop]: Abstraction has 17008 states and 59146 transitions. [2021-06-05 14:10:06,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:06,915 INFO L276 IsEmpty]: Start isEmpty. Operand 17008 states and 59146 transitions. [2021-06-05 14:10:06,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:06,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:06,921 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:07,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21563,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:07,125 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:07,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:07,125 INFO L82 PathProgramCache]: Analyzing trace with hash -839376295, now seen corresponding path program 198 times [2021-06-05 14:10:07,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:07,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135835052] [2021-06-05 14:10:07,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:07,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:07,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135835052] [2021-06-05 14:10:07,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135835052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:07,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977732953] [2021-06-05 14:10:07,182 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 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 14:10:07,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 14:10:07,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:07,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:07,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:07,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977732953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:07,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:07,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:10:07,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579334983] [2021-06-05 14:10:07,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:10:07,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:07,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:10:07,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:10:07,296 INFO L87 Difference]: Start difference. First operand 17008 states and 59146 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:07,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:07,533 INFO L93 Difference]: Finished difference Result 17271 states and 59536 transitions. [2021-06-05 14:10:07,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:10:07,533 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:07,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:07,566 INFO L225 Difference]: With dead ends: 17271 [2021-06-05 14:10:07,566 INFO L226 Difference]: Without dead ends: 17269 [2021-06-05 14:10:07,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:10:07,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17269 states. [2021-06-05 14:10:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17269 to 17008. [2021-06-05 14:10:07,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17008 states, 17007 states have (on average 3.4775092608925737) internal successors, (59142), 17007 states have internal predecessors, (59142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17008 states to 17008 states and 59142 transitions. [2021-06-05 14:10:07,901 INFO L78 Accepts]: Start accepts. Automaton has 17008 states and 59142 transitions. Word has length 22 [2021-06-05 14:10:07,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:07,901 INFO L482 AbstractCegarLoop]: Abstraction has 17008 states and 59142 transitions. [2021-06-05 14:10:07,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:07,901 INFO L276 IsEmpty]: Start isEmpty. Operand 17008 states and 59142 transitions. [2021-06-05 14:10:07,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:07,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:07,908 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:08,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21564 [2021-06-05 14:10:08,121 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:08,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:08,121 INFO L82 PathProgramCache]: Analyzing trace with hash 938349092, now seen corresponding path program 199 times [2021-06-05 14:10:08,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:08,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383101159] [2021-06-05 14:10:08,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:08,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:08,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383101159] [2021-06-05 14:10:08,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383101159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:08,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80794089] [2021-06-05 14:10:08,175 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 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 14:10:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:08,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:08,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:08,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80794089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:08,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:08,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:10:08,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572317518] [2021-06-05 14:10:08,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:10:08,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:08,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:10:08,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:10:08,239 INFO L87 Difference]: Start difference. First operand 17008 states and 59142 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:08,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:08,388 INFO L93 Difference]: Finished difference Result 17397 states and 59814 transitions. [2021-06-05 14:10:08,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:10:08,389 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:08,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:08,427 INFO L225 Difference]: With dead ends: 17397 [2021-06-05 14:10:08,427 INFO L226 Difference]: Without dead ends: 17397 [2021-06-05 14:10:08,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:10:08,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17397 states. [2021-06-05 14:10:08,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17397 to 16977. [2021-06-05 14:10:08,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16977 states, 16976 states have (on average 3.4736687087653157) internal successors, (58969), 16976 states have internal predecessors, (58969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:08,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16977 states to 16977 states and 58969 transitions. [2021-06-05 14:10:08,883 INFO L78 Accepts]: Start accepts. Automaton has 16977 states and 58969 transitions. Word has length 22 [2021-06-05 14:10:08,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:08,883 INFO L482 AbstractCegarLoop]: Abstraction has 16977 states and 58969 transitions. [2021-06-05 14:10:08,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:08,883 INFO L276 IsEmpty]: Start isEmpty. Operand 16977 states and 58969 transitions. [2021-06-05 14:10:08,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:08,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:08,889 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:09,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21565 [2021-06-05 14:10:09,105 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:09,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:09,106 INFO L82 PathProgramCache]: Analyzing trace with hash 650028701, now seen corresponding path program 200 times [2021-06-05 14:10:09,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:09,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828772317] [2021-06-05 14:10:09,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:10:09,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:09,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828772317] [2021-06-05 14:10:09,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828772317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:09,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452307393] [2021-06-05 14:10:09,167 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 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 14:10:09,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:10:09,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:09,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:09,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:10:09,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452307393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:09,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:09,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:10:09,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848726349] [2021-06-05 14:10:09,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:10:09,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:09,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:10:09,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:10:09,249 INFO L87 Difference]: Start difference. First operand 16977 states and 58969 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:09,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:09,442 INFO L93 Difference]: Finished difference Result 19691 states and 67365 transitions. [2021-06-05 14:10:09,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:10:09,443 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:09,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:09,483 INFO L225 Difference]: With dead ends: 19691 [2021-06-05 14:10:09,484 INFO L226 Difference]: Without dead ends: 19688 [2021-06-05 14:10:09,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:10:09,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19688 states. [2021-06-05 14:10:09,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19688 to 17043. [2021-06-05 14:10:09,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17043 states, 17042 states have (on average 3.4742987912216874) internal successors, (59209), 17042 states have internal predecessors, (59209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17043 states to 17043 states and 59209 transitions. [2021-06-05 14:10:09,847 INFO L78 Accepts]: Start accepts. Automaton has 17043 states and 59209 transitions. Word has length 22 [2021-06-05 14:10:09,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:09,847 INFO L482 AbstractCegarLoop]: Abstraction has 17043 states and 59209 transitions. [2021-06-05 14:10:09,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:09,847 INFO L276 IsEmpty]: Start isEmpty. Operand 17043 states and 59209 transitions. [2021-06-05 14:10:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:09,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:09,853 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:10,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21566 [2021-06-05 14:10:10,069 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:10,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:10,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1122510710, now seen corresponding path program 201 times [2021-06-05 14:10:10,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:10,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615754159] [2021-06-05 14:10:10,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:10:10,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:10,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615754159] [2021-06-05 14:10:10,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615754159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:10,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106488459] [2021-06-05 14:10:10,125 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 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 14:10:10,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:10:10,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:10,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:10,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:10:10,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106488459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:10,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:10,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:10:10,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038578676] [2021-06-05 14:10:10,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:10:10,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:10,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:10:10,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:10:10,205 INFO L87 Difference]: Start difference. First operand 17043 states and 59209 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:10,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:10,500 INFO L93 Difference]: Finished difference Result 26038 states and 89720 transitions. [2021-06-05 14:10:10,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:10:10,500 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:10,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:10,558 INFO L225 Difference]: With dead ends: 26038 [2021-06-05 14:10:10,558 INFO L226 Difference]: Without dead ends: 26038 [2021-06-05 14:10:10,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:10:10,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26038 states. [2021-06-05 14:10:10,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26038 to 25505. [2021-06-05 14:10:10,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25505 states, 25504 states have (on average 3.4754548306148054) internal successors, (88638), 25504 states have internal predecessors, (88638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:11,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25505 states to 25505 states and 88638 transitions. [2021-06-05 14:10:11,007 INFO L78 Accepts]: Start accepts. Automaton has 25505 states and 88638 transitions. Word has length 22 [2021-06-05 14:10:11,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:11,007 INFO L482 AbstractCegarLoop]: Abstraction has 25505 states and 88638 transitions. [2021-06-05 14:10:11,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:11,007 INFO L276 IsEmpty]: Start isEmpty. Operand 25505 states and 88638 transitions. [2021-06-05 14:10:11,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:11,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:11,014 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:11,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21567 [2021-06-05 14:10:11,225 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:11,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:11,225 INFO L82 PathProgramCache]: Analyzing trace with hash -423056679, now seen corresponding path program 202 times [2021-06-05 14:10:11,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:11,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074692479] [2021-06-05 14:10:11,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:11,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:11,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074692479] [2021-06-05 14:10:11,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074692479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:11,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165109261] [2021-06-05 14:10:11,290 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 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 14:10:11,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:10:11,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:11,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:11,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:11,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165109261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:11,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:11,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:11,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863724722] [2021-06-05 14:10:11,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:11,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:11,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:11,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:11,354 INFO L87 Difference]: Start difference. First operand 25505 states and 88638 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:11,612 INFO L93 Difference]: Finished difference Result 28515 states and 98094 transitions. [2021-06-05 14:10:11,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:10:11,612 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:11,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:11,677 INFO L225 Difference]: With dead ends: 28515 [2021-06-05 14:10:11,677 INFO L226 Difference]: Without dead ends: 28511 [2021-06-05 14:10:11,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:10:11,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28511 states. [2021-06-05 14:10:12,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28511 to 25686. [2021-06-05 14:10:12,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25686 states, 25685 states have (on average 3.4768152618259687) internal successors, (89302), 25685 states have internal predecessors, (89302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:12,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25686 states to 25686 states and 89302 transitions. [2021-06-05 14:10:12,349 INFO L78 Accepts]: Start accepts. Automaton has 25686 states and 89302 transitions. Word has length 22 [2021-06-05 14:10:12,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:12,350 INFO L482 AbstractCegarLoop]: Abstraction has 25686 states and 89302 transitions. [2021-06-05 14:10:12,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:12,350 INFO L276 IsEmpty]: Start isEmpty. Operand 25686 states and 89302 transitions. [2021-06-05 14:10:12,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:12,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:12,356 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:12,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21568 [2021-06-05 14:10:12,569 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:12,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:12,569 INFO L82 PathProgramCache]: Analyzing trace with hash -584655132, now seen corresponding path program 203 times [2021-06-05 14:10:12,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:12,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79772549] [2021-06-05 14:10:12,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:12,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:12,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79772549] [2021-06-05 14:10:12,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79772549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:12,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137906092] [2021-06-05 14:10:12,632 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 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 14:10:12,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:10:12,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:12,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:12,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:12,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137906092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:12,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:12,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:12,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490218553] [2021-06-05 14:10:12,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:12,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:12,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:12,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:12,712 INFO L87 Difference]: Start difference. First operand 25686 states and 89302 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:12,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:12,928 INFO L93 Difference]: Finished difference Result 26560 states and 91297 transitions. [2021-06-05 14:10:12,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:10:12,928 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:12,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:12,989 INFO L225 Difference]: With dead ends: 26560 [2021-06-05 14:10:12,989 INFO L226 Difference]: Without dead ends: 26560 [2021-06-05 14:10:12,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:10:13,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26560 states. [2021-06-05 14:10:13,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26560 to 25734. [2021-06-05 14:10:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25734 states, 25733 states have (on average 3.4752263630357905) internal successors, (89428), 25733 states have internal predecessors, (89428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:13,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25734 states to 25734 states and 89428 transitions. [2021-06-05 14:10:13,779 INFO L78 Accepts]: Start accepts. Automaton has 25734 states and 89428 transitions. Word has length 22 [2021-06-05 14:10:13,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:13,779 INFO L482 AbstractCegarLoop]: Abstraction has 25734 states and 89428 transitions. [2021-06-05 14:10:13,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:13,780 INFO L276 IsEmpty]: Start isEmpty. Operand 25734 states and 89428 transitions. [2021-06-05 14:10:13,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:13,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:13,786 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:13,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21569,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:13,997 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:13,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:13,997 INFO L82 PathProgramCache]: Analyzing trace with hash 671034909, now seen corresponding path program 204 times [2021-06-05 14:10:13,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:13,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27492641] [2021-06-05 14:10:13,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:14,063 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:14,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:14,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27492641] [2021-06-05 14:10:14,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27492641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:14,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951282000] [2021-06-05 14:10:14,063 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 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 14:10:14,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:10:14,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:14,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:14,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:14,133 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:14,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951282000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:14,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:14,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:14,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32621543] [2021-06-05 14:10:14,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:14,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:14,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:14,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:14,134 INFO L87 Difference]: Start difference. First operand 25734 states and 89428 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:14,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:14,369 INFO L93 Difference]: Finished difference Result 26225 states and 90728 transitions. [2021-06-05 14:10:14,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:10:14,369 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:14,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:14,423 INFO L225 Difference]: With dead ends: 26225 [2021-06-05 14:10:14,423 INFO L226 Difference]: Without dead ends: 26220 [2021-06-05 14:10:14,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:10:14,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26220 states. [2021-06-05 14:10:14,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26220 to 25734. [2021-06-05 14:10:14,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25734 states, 25733 states have (on average 3.475187502428788) internal successors, (89427), 25733 states have internal predecessors, (89427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:14,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25734 states to 25734 states and 89427 transitions. [2021-06-05 14:10:14,920 INFO L78 Accepts]: Start accepts. Automaton has 25734 states and 89427 transitions. Word has length 22 [2021-06-05 14:10:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:14,921 INFO L482 AbstractCegarLoop]: Abstraction has 25734 states and 89427 transitions. [2021-06-05 14:10:14,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:14,921 INFO L276 IsEmpty]: Start isEmpty. Operand 25734 states and 89427 transitions. [2021-06-05 14:10:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:14,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:14,928 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:15,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21570,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:15,128 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:15,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:15,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1091001398, now seen corresponding path program 205 times [2021-06-05 14:10:15,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:15,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558525716] [2021-06-05 14:10:15,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:15,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:15,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558525716] [2021-06-05 14:10:15,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558525716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:15,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512485877] [2021-06-05 14:10:15,199 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 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 14:10:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:15,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:15,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:15,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512485877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:15,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:15,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:15,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314058725] [2021-06-05 14:10:15,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:15,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:15,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:15,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:15,267 INFO L87 Difference]: Start difference. First operand 25734 states and 89427 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:15,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:15,753 INFO L93 Difference]: Finished difference Result 28702 states and 98967 transitions. [2021-06-05 14:10:15,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:10:15,754 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:15,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:15,825 INFO L225 Difference]: With dead ends: 28702 [2021-06-05 14:10:15,825 INFO L226 Difference]: Without dead ends: 28702 [2021-06-05 14:10:15,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:10:15,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28702 states. [2021-06-05 14:10:16,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28702 to 28343. [2021-06-05 14:10:16,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28343 states, 28342 states have (on average 3.469938607014325) internal successors, (98345), 28342 states have internal predecessors, (98345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:16,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28343 states to 28343 states and 98345 transitions. [2021-06-05 14:10:16,400 INFO L78 Accepts]: Start accepts. Automaton has 28343 states and 98345 transitions. Word has length 22 [2021-06-05 14:10:16,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:16,400 INFO L482 AbstractCegarLoop]: Abstraction has 28343 states and 98345 transitions. [2021-06-05 14:10:16,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:16,400 INFO L276 IsEmpty]: Start isEmpty. Operand 28343 states and 98345 transitions. [2021-06-05 14:10:16,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:16,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:16,408 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:16,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21571 [2021-06-05 14:10:16,625 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:16,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:16,625 INFO L82 PathProgramCache]: Analyzing trace with hash 228135769, now seen corresponding path program 206 times [2021-06-05 14:10:16,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:16,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741694083] [2021-06-05 14:10:16,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:16,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:16,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741694083] [2021-06-05 14:10:16,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741694083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:16,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752185547] [2021-06-05 14:10:16,695 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 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 14:10:16,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:10:16,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:16,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:16,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:16,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752185547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:16,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:16,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:16,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282067601] [2021-06-05 14:10:16,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:16,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:16,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:16,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:16,768 INFO L87 Difference]: Start difference. First operand 28343 states and 98345 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:17,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:17,008 INFO L93 Difference]: Finished difference Result 28805 states and 99574 transitions. [2021-06-05 14:10:17,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:10:17,008 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:17,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:17,080 INFO L225 Difference]: With dead ends: 28805 [2021-06-05 14:10:17,080 INFO L226 Difference]: Without dead ends: 28799 [2021-06-05 14:10:17,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:10:17,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28799 states. [2021-06-05 14:10:17,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28799 to 28343. [2021-06-05 14:10:17,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28343 states, 28342 states have (on average 3.4699033236892243) internal successors, (98344), 28342 states have internal predecessors, (98344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:17,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28343 states to 28343 states and 98344 transitions. [2021-06-05 14:10:17,742 INFO L78 Accepts]: Start accepts. Automaton has 28343 states and 98344 transitions. Word has length 22 [2021-06-05 14:10:17,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:17,742 INFO L482 AbstractCegarLoop]: Abstraction has 28343 states and 98344 transitions. [2021-06-05 14:10:17,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:17,742 INFO L276 IsEmpty]: Start isEmpty. Operand 28343 states and 98344 transitions. [2021-06-05 14:10:17,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:17,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:17,749 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:17,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21572 [2021-06-05 14:10:17,965 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:17,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:17,965 INFO L82 PathProgramCache]: Analyzing trace with hash 392133540, now seen corresponding path program 207 times [2021-06-05 14:10:17,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:17,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949864889] [2021-06-05 14:10:17,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:18,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:18,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949864889] [2021-06-05 14:10:18,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949864889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:18,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825664733] [2021-06-05 14:10:18,032 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 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 14:10:18,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:10:18,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:18,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:18,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:18,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825664733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:18,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:18,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:18,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933602608] [2021-06-05 14:10:18,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:18,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:18,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:18,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:18,102 INFO L87 Difference]: Start difference. First operand 28343 states and 98344 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:18,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:18,388 INFO L93 Difference]: Finished difference Result 29601 states and 101949 transitions. [2021-06-05 14:10:18,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:10:18,389 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:18,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:18,461 INFO L225 Difference]: With dead ends: 29601 [2021-06-05 14:10:18,462 INFO L226 Difference]: Without dead ends: 29601 [2021-06-05 14:10:18,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:10:18,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29601 states. [2021-06-05 14:10:19,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29601 to 29306. [2021-06-05 14:10:19,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29306 states, 29305 states have (on average 3.463504521412728) internal successors, (101498), 29305 states have internal predecessors, (101498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:19,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29306 states to 29306 states and 101498 transitions. [2021-06-05 14:10:19,186 INFO L78 Accepts]: Start accepts. Automaton has 29306 states and 101498 transitions. Word has length 22 [2021-06-05 14:10:19,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:19,186 INFO L482 AbstractCegarLoop]: Abstraction has 29306 states and 101498 transitions. [2021-06-05 14:10:19,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:19,186 INFO L276 IsEmpty]: Start isEmpty. Operand 29306 states and 101498 transitions. [2021-06-05 14:10:19,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:19,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:19,196 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:19,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21573 [2021-06-05 14:10:19,407 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:19,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:19,407 INFO L82 PathProgramCache]: Analyzing trace with hash -616835683, now seen corresponding path program 208 times [2021-06-05 14:10:19,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:19,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114010764] [2021-06-05 14:10:19,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:19,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:19,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114010764] [2021-06-05 14:10:19,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114010764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:19,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977747156] [2021-06-05 14:10:19,479 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 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 14:10:19,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:10:19,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:19,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:19,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:19,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977747156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:19,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:19,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:19,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477355534] [2021-06-05 14:10:19,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:19,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:19,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:19,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:19,543 INFO L87 Difference]: Start difference. First operand 29306 states and 101498 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:19,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:19,793 INFO L93 Difference]: Finished difference Result 29739 states and 102655 transitions. [2021-06-05 14:10:19,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:10:19,793 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:19,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:19,860 INFO L225 Difference]: With dead ends: 29739 [2021-06-05 14:10:19,860 INFO L226 Difference]: Without dead ends: 29732 [2021-06-05 14:10:19,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:10:19,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29732 states. [2021-06-05 14:10:20,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29732 to 29306. [2021-06-05 14:10:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29306 states, 29305 states have (on average 3.463470397543081) internal successors, (101497), 29305 states have internal predecessors, (101497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:20,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29306 states to 29306 states and 101497 transitions. [2021-06-05 14:10:20,588 INFO L78 Accepts]: Start accepts. Automaton has 29306 states and 101497 transitions. Word has length 22 [2021-06-05 14:10:20,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:20,588 INFO L482 AbstractCegarLoop]: Abstraction has 29306 states and 101497 transitions. [2021-06-05 14:10:20,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:20,588 INFO L276 IsEmpty]: Start isEmpty. Operand 29306 states and 101497 transitions. [2021-06-05 14:10:20,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:20,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:20,596 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:20,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21574 [2021-06-05 14:10:20,809 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:20,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:20,809 INFO L82 PathProgramCache]: Analyzing trace with hash -875323638, now seen corresponding path program 209 times [2021-06-05 14:10:20,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:20,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159839178] [2021-06-05 14:10:20,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:20,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:20,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159839178] [2021-06-05 14:10:20,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159839178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:20,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892167038] [2021-06-05 14:10:20,890 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 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 14:10:20,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:10:20,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:20,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:20,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:21,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892167038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:21,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:21,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:21,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750878046] [2021-06-05 14:10:21,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:21,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:21,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:21,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:21,131 INFO L87 Difference]: Start difference. First operand 29306 states and 101497 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:21,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:21,567 INFO L93 Difference]: Finished difference Result 29939 states and 102947 transitions. [2021-06-05 14:10:21,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:10:21,567 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:21,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:21,638 INFO L225 Difference]: With dead ends: 29939 [2021-06-05 14:10:21,638 INFO L226 Difference]: Without dead ends: 29939 [2021-06-05 14:10:21,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 301.2ms TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:10:21,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29939 states. [2021-06-05 14:10:22,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29939 to 29574. [2021-06-05 14:10:22,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29574 states, 29573 states have (on average 3.4610286409900923) internal successors, (102353), 29573 states have internal predecessors, (102353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:22,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29574 states to 29574 states and 102353 transitions. [2021-06-05 14:10:22,552 INFO L78 Accepts]: Start accepts. Automaton has 29574 states and 102353 transitions. Word has length 22 [2021-06-05 14:10:22,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:22,552 INFO L482 AbstractCegarLoop]: Abstraction has 29574 states and 102353 transitions. [2021-06-05 14:10:22,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:22,552 INFO L276 IsEmpty]: Start isEmpty. Operand 29574 states and 102353 transitions. [2021-06-05 14:10:22,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:22,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:22,560 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:22,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21575,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:22,776 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:22,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:22,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1041146919, now seen corresponding path program 210 times [2021-06-05 14:10:22,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:22,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717863067] [2021-06-05 14:10:22,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:22,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:22,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717863067] [2021-06-05 14:10:22,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717863067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:22,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354646321] [2021-06-05 14:10:22,853 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 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 14:10:22,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:10:22,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:22,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:22,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:22,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354646321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:22,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:22,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:22,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921670679] [2021-06-05 14:10:22,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:22,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:22,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:22,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:22,919 INFO L87 Difference]: Start difference. First operand 29574 states and 102353 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:23,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:23,165 INFO L93 Difference]: Finished difference Result 29973 states and 103433 transitions. [2021-06-05 14:10:23,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:10:23,166 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:23,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:23,232 INFO L225 Difference]: With dead ends: 29973 [2021-06-05 14:10:23,233 INFO L226 Difference]: Without dead ends: 29965 [2021-06-05 14:10:23,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:10:23,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29965 states. [2021-06-05 14:10:23,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29965 to 29574. [2021-06-05 14:10:23,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29574 states, 29573 states have (on average 3.460994826361884) internal successors, (102352), 29573 states have internal predecessors, (102352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29574 states to 29574 states and 102352 transitions. [2021-06-05 14:10:24,123 INFO L78 Accepts]: Start accepts. Automaton has 29574 states and 102352 transitions. Word has length 22 [2021-06-05 14:10:24,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:24,123 INFO L482 AbstractCegarLoop]: Abstraction has 29574 states and 102352 transitions. [2021-06-05 14:10:24,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:24,123 INFO L276 IsEmpty]: Start isEmpty. Operand 29574 states and 102352 transitions. [2021-06-05 14:10:24,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:24,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:24,132 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:24,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21576 [2021-06-05 14:10:24,332 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:24,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:24,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1511790492, now seen corresponding path program 211 times [2021-06-05 14:10:24,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:24,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029230516] [2021-06-05 14:10:24,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:24,416 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:24,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:24,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029230516] [2021-06-05 14:10:24,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029230516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:24,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278609049] [2021-06-05 14:10:24,417 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 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 14:10:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:24,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:24,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:24,492 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:24,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278609049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:24,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:24,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:24,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716565067] [2021-06-05 14:10:24,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:24,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:24,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:24,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:24,493 INFO L87 Difference]: Start difference. First operand 29574 states and 102352 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:24,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:24,996 INFO L93 Difference]: Finished difference Result 30267 states and 103892 transitions. [2021-06-05 14:10:24,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 14:10:24,997 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:24,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:25,068 INFO L225 Difference]: With dead ends: 30267 [2021-06-05 14:10:25,069 INFO L226 Difference]: Without dead ends: 30267 [2021-06-05 14:10:25,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 362.6ms TimeCoverageRelationStatistics Valid=754, Invalid=1502, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 14:10:25,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30267 states. [2021-06-05 14:10:25,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30267 to 29743. [2021-06-05 14:10:25,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29743 states, 29742 states have (on average 3.458879698742519) internal successors, (102874), 29742 states have internal predecessors, (102874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:25,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29743 states to 29743 states and 102874 transitions. [2021-06-05 14:10:25,669 INFO L78 Accepts]: Start accepts. Automaton has 29743 states and 102874 transitions. Word has length 22 [2021-06-05 14:10:25,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:25,669 INFO L482 AbstractCegarLoop]: Abstraction has 29743 states and 102874 transitions. [2021-06-05 14:10:25,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:25,669 INFO L276 IsEmpty]: Start isEmpty. Operand 29743 states and 102874 transitions. [2021-06-05 14:10:25,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:25,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:25,678 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:25,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21577,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:25,889 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:25,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2137915585, now seen corresponding path program 212 times [2021-06-05 14:10:25,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:25,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687566189] [2021-06-05 14:10:25,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:25,941 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:10:25,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:25,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687566189] [2021-06-05 14:10:25,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687566189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:25,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565502075] [2021-06-05 14:10:25,941 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 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 14:10:26,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:10:26,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:26,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:26,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 46 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:10:26,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565502075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:26,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:26,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:10:26,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931565349] [2021-06-05 14:10:26,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:10:26,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:26,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:10:26,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:10:26,232 INFO L87 Difference]: Start difference. First operand 29743 states and 102874 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:26,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:26,442 INFO L93 Difference]: Finished difference Result 30158 states and 103835 transitions. [2021-06-05 14:10:26,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:10:26,442 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:10:26,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:26,502 INFO L225 Difference]: With dead ends: 30158 [2021-06-05 14:10:26,502 INFO L226 Difference]: Without dead ends: 30158 [2021-06-05 14:10:26,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:10:26,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30158 states. [2021-06-05 14:10:26,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30158 to 29791. [2021-06-05 14:10:27,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29791 states, 29790 states have (on average 3.4585431352802956) internal successors, (103030), 29790 states have internal predecessors, (103030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:27,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29791 states to 29791 states and 103030 transitions. [2021-06-05 14:10:27,085 INFO L78 Accepts]: Start accepts. Automaton has 29791 states and 103030 transitions. Word has length 22 [2021-06-05 14:10:27,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:27,086 INFO L482 AbstractCegarLoop]: Abstraction has 29791 states and 103030 transitions. [2021-06-05 14:10:27,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:27,086 INFO L276 IsEmpty]: Start isEmpty. Operand 29791 states and 103030 transitions. [2021-06-05 14:10:27,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:27,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:27,094 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:27,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21578 [2021-06-05 14:10:27,309 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:27,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:27,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1379307466, now seen corresponding path program 213 times [2021-06-05 14:10:27,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:27,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070533970] [2021-06-05 14:10:27,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:10:27,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:27,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070533970] [2021-06-05 14:10:27,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070533970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:27,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438174734] [2021-06-05 14:10:27,358 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 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 14:10:27,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:10:27,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:27,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:27,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:10:27,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438174734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:27,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:27,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:10:27,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047126117] [2021-06-05 14:10:27,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:10:27,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:27,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:10:27,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:10:27,417 INFO L87 Difference]: Start difference. First operand 29791 states and 103030 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:27,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:27,913 INFO L93 Difference]: Finished difference Result 31233 states and 107516 transitions. [2021-06-05 14:10:27,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:10:27,913 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:10:27,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:27,988 INFO L225 Difference]: With dead ends: 31233 [2021-06-05 14:10:27,988 INFO L226 Difference]: Without dead ends: 31229 [2021-06-05 14:10:27,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:10:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31229 states. [2021-06-05 14:10:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31229 to 28496. [2021-06-05 14:10:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28496 states, 28495 states have (on average 3.449131426566064) internal successors, (98283), 28495 states have internal predecessors, (98283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:28,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28496 states to 28496 states and 98283 transitions. [2021-06-05 14:10:28,554 INFO L78 Accepts]: Start accepts. Automaton has 28496 states and 98283 transitions. Word has length 22 [2021-06-05 14:10:28,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:28,554 INFO L482 AbstractCegarLoop]: Abstraction has 28496 states and 98283 transitions. [2021-06-05 14:10:28,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:28,554 INFO L276 IsEmpty]: Start isEmpty. Operand 28496 states and 98283 transitions. [2021-06-05 14:10:28,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:28,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:28,562 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:28,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21579,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:28,774 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:28,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:28,774 INFO L82 PathProgramCache]: Analyzing trace with hash 2127159261, now seen corresponding path program 214 times [2021-06-05 14:10:28,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:28,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480062607] [2021-06-05 14:10:28,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:28,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:28,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480062607] [2021-06-05 14:10:28,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480062607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:28,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051058275] [2021-06-05 14:10:28,833 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 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 14:10:28,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:10:28,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:28,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:28,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:10:28,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051058275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:28,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:28,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:10:28,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85692448] [2021-06-05 14:10:28,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:10:28,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:28,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:10:28,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:10:28,894 INFO L87 Difference]: Start difference. First operand 28496 states and 98283 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:29,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:29,129 INFO L93 Difference]: Finished difference Result 28956 states and 99501 transitions. [2021-06-05 14:10:29,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:10:29,130 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:10:29,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:29,187 INFO L225 Difference]: With dead ends: 28956 [2021-06-05 14:10:29,187 INFO L226 Difference]: Without dead ends: 28951 [2021-06-05 14:10:29,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:10:29,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28951 states. [2021-06-05 14:10:29,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28951 to 28496. [2021-06-05 14:10:29,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28496 states, 28495 states have (on average 3.449061238813827) internal successors, (98281), 28495 states have internal predecessors, (98281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:29,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28496 states to 28496 states and 98281 transitions. [2021-06-05 14:10:29,859 INFO L78 Accepts]: Start accepts. Automaton has 28496 states and 98281 transitions. Word has length 22 [2021-06-05 14:10:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:29,859 INFO L482 AbstractCegarLoop]: Abstraction has 28496 states and 98281 transitions. [2021-06-05 14:10:29,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:29,859 INFO L276 IsEmpty]: Start isEmpty. Operand 28496 states and 98281 transitions. [2021-06-05 14:10:29,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:29,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:29,867 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:30,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21580 [2021-06-05 14:10:30,083 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:30,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:30,084 INFO L82 PathProgramCache]: Analyzing trace with hash 365122954, now seen corresponding path program 215 times [2021-06-05 14:10:30,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:30,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109931412] [2021-06-05 14:10:30,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:30,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:30,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109931412] [2021-06-05 14:10:30,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109931412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:30,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460527646] [2021-06-05 14:10:30,141 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 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 14:10:30,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:10:30,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:30,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:30,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:10:30,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460527646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:30,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:30,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:10:30,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514036850] [2021-06-05 14:10:30,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:10:30,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:30,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:10:30,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:10:30,218 INFO L87 Difference]: Start difference. First operand 28496 states and 98281 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:30,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:30,559 INFO L93 Difference]: Finished difference Result 34766 states and 118378 transitions. [2021-06-05 14:10:30,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:10:30,560 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:10:30,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:30,639 INFO L225 Difference]: With dead ends: 34766 [2021-06-05 14:10:30,639 INFO L226 Difference]: Without dead ends: 34766 [2021-06-05 14:10:30,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=301, Invalid=569, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:10:30,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34766 states. [2021-06-05 14:10:31,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34766 to 33433. [2021-06-05 14:10:31,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33433 states, 33432 states have (on average 3.4411043311797083) internal successors, (115043), 33432 states have internal predecessors, (115043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:31,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33433 states to 33433 states and 115043 transitions. [2021-06-05 14:10:31,426 INFO L78 Accepts]: Start accepts. Automaton has 33433 states and 115043 transitions. Word has length 22 [2021-06-05 14:10:31,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:31,426 INFO L482 AbstractCegarLoop]: Abstraction has 33433 states and 115043 transitions. [2021-06-05 14:10:31,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 33433 states and 115043 transitions. [2021-06-05 14:10:31,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:31,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:31,435 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:31,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21581 [2021-06-05 14:10:31,641 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:31,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:31,641 INFO L82 PathProgramCache]: Analyzing trace with hash 859702083, now seen corresponding path program 216 times [2021-06-05 14:10:31,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:31,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426861870] [2021-06-05 14:10:31,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:31,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:31,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426861870] [2021-06-05 14:10:31,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426861870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:31,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365770480] [2021-06-05 14:10:31,720 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 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 14:10:31,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:10:31,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:31,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:31,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:31,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365770480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:31,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:31,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:10:31,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781869037] [2021-06-05 14:10:31,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:10:31,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:31,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:10:31,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:10:31,789 INFO L87 Difference]: Start difference. First operand 33433 states and 115043 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:32,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:32,109 INFO L93 Difference]: Finished difference Result 33998 states and 116476 transitions. [2021-06-05 14:10:32,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:10:32,110 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:32,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:32,185 INFO L225 Difference]: With dead ends: 33998 [2021-06-05 14:10:32,185 INFO L226 Difference]: Without dead ends: 33993 [2021-06-05 14:10:32,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:10:32,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33993 states. [2021-06-05 14:10:32,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33993 to 33433. [2021-06-05 14:10:32,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33433 states, 33432 states have (on average 3.440984685331419) internal successors, (115039), 33432 states have internal predecessors, (115039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:33,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33433 states to 33433 states and 115039 transitions. [2021-06-05 14:10:33,043 INFO L78 Accepts]: Start accepts. Automaton has 33433 states and 115039 transitions. Word has length 22 [2021-06-05 14:10:33,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:33,043 INFO L482 AbstractCegarLoop]: Abstraction has 33433 states and 115039 transitions. [2021-06-05 14:10:33,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:33,043 INFO L276 IsEmpty]: Start isEmpty. Operand 33433 states and 115039 transitions. [2021-06-05 14:10:33,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:33,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:33,052 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:33,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21582,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:33,253 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:33,253 INFO L82 PathProgramCache]: Analyzing trace with hash -902334224, now seen corresponding path program 217 times [2021-06-05 14:10:33,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:33,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250986298] [2021-06-05 14:10:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:33,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:33,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250986298] [2021-06-05 14:10:33,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250986298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:33,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094226868] [2021-06-05 14:10:33,314 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 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 14:10:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:33,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:33,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:33,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094226868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:33,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:33,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:10:33,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473612094] [2021-06-05 14:10:33,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:10:33,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:33,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:10:33,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:10:33,377 INFO L87 Difference]: Start difference. First operand 33433 states and 115039 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:33,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:33,846 INFO L93 Difference]: Finished difference Result 40272 states and 136673 transitions. [2021-06-05 14:10:33,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:10:33,846 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:33,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:33,933 INFO L225 Difference]: With dead ends: 40272 [2021-06-05 14:10:33,933 INFO L226 Difference]: Without dead ends: 40272 [2021-06-05 14:10:33,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=325, Invalid=605, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:10:33,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40272 states. [2021-06-05 14:10:34,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40272 to 29596. [2021-06-05 14:10:34,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29596 states, 29595 states have (on average 3.431120121642169) internal successors, (101544), 29595 states have internal predecessors, (101544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:34,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29596 states to 29596 states and 101544 transitions. [2021-06-05 14:10:34,847 INFO L78 Accepts]: Start accepts. Automaton has 29596 states and 101544 transitions. Word has length 22 [2021-06-05 14:10:34,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:34,847 INFO L482 AbstractCegarLoop]: Abstraction has 29596 states and 101544 transitions. [2021-06-05 14:10:34,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:34,847 INFO L276 IsEmpty]: Start isEmpty. Operand 29596 states and 101544 transitions. [2021-06-05 14:10:34,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:34,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:34,856 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:35,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21583 [2021-06-05 14:10:35,057 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:35,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:35,058 INFO L82 PathProgramCache]: Analyzing trace with hash 416802943, now seen corresponding path program 218 times [2021-06-05 14:10:35,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:35,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022891018] [2021-06-05 14:10:35,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:35,126 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:35,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:35,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022891018] [2021-06-05 14:10:35,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022891018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:35,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290052454] [2021-06-05 14:10:35,126 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 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 14:10:35,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:10:35,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:35,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:35,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:35,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290052454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:35,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:35,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:10:35,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886095321] [2021-06-05 14:10:35,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:10:35,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:35,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:10:35,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:10:35,183 INFO L87 Difference]: Start difference. First operand 29596 states and 101544 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:35,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:35,498 INFO L93 Difference]: Finished difference Result 30323 states and 103506 transitions. [2021-06-05 14:10:35,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:10:35,499 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:35,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:35,567 INFO L225 Difference]: With dead ends: 30323 [2021-06-05 14:10:35,567 INFO L226 Difference]: Without dead ends: 30317 [2021-06-05 14:10:35,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:10:35,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30317 states. [2021-06-05 14:10:36,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30317 to 29652. [2021-06-05 14:10:36,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29652 states, 29651 states have (on average 3.4303058918754847) internal successors, (101712), 29651 states have internal predecessors, (101712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:36,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29652 states to 29652 states and 101712 transitions. [2021-06-05 14:10:36,359 INFO L78 Accepts]: Start accepts. Automaton has 29652 states and 101712 transitions. Word has length 22 [2021-06-05 14:10:36,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:36,359 INFO L482 AbstractCegarLoop]: Abstraction has 29652 states and 101712 transitions. [2021-06-05 14:10:36,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:36,359 INFO L276 IsEmpty]: Start isEmpty. Operand 29652 states and 101712 transitions. [2021-06-05 14:10:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:36,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:36,367 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:36,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21584 [2021-06-05 14:10:36,568 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:36,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:36,568 INFO L82 PathProgramCache]: Analyzing trace with hash 580800714, now seen corresponding path program 219 times [2021-06-05 14:10:36,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:36,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317251677] [2021-06-05 14:10:36,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:36,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:36,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317251677] [2021-06-05 14:10:36,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317251677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:36,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109229151] [2021-06-05 14:10:36,640 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 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 14:10:36,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:10:36,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:36,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:36,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:36,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109229151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:36,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:36,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:10:36,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315206119] [2021-06-05 14:10:36,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:10:36,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:36,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:10:36,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:10:36,876 INFO L87 Difference]: Start difference. First operand 29652 states and 101712 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:37,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:37,286 INFO L93 Difference]: Finished difference Result 34838 states and 118433 transitions. [2021-06-05 14:10:37,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:10:37,288 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:37,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:37,368 INFO L225 Difference]: With dead ends: 34838 [2021-06-05 14:10:37,368 INFO L226 Difference]: Without dead ends: 34838 [2021-06-05 14:10:37,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 263.3ms TimeCoverageRelationStatistics Valid=453, Invalid=879, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:10:37,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34838 states. [2021-06-05 14:10:38,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34838 to 33690. [2021-06-05 14:10:38,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33690 states, 33689 states have (on average 3.4329603134554305) internal successors, (115653), 33689 states have internal predecessors, (115653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:38,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33690 states to 33690 states and 115653 transitions. [2021-06-05 14:10:38,273 INFO L78 Accepts]: Start accepts. Automaton has 33690 states and 115653 transitions. Word has length 22 [2021-06-05 14:10:38,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:38,273 INFO L482 AbstractCegarLoop]: Abstraction has 33690 states and 115653 transitions. [2021-06-05 14:10:38,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:38,273 INFO L276 IsEmpty]: Start isEmpty. Operand 33690 states and 115653 transitions. [2021-06-05 14:10:38,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:38,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:38,282 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:38,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21585,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:38,498 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:38,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:38,498 INFO L82 PathProgramCache]: Analyzing trace with hash 223235229, now seen corresponding path program 220 times [2021-06-05 14:10:38,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:38,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686229107] [2021-06-05 14:10:38,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:38,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:38,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686229107] [2021-06-05 14:10:38,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686229107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:38,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226067862] [2021-06-05 14:10:38,562 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 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 14:10:38,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:10:38,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:38,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:38,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:38,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226067862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:38,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:38,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:38,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300910562] [2021-06-05 14:10:38,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:38,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:38,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:38,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:38,627 INFO L87 Difference]: Start difference. First operand 33690 states and 115653 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:38,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:38,940 INFO L93 Difference]: Finished difference Result 34116 states and 116578 transitions. [2021-06-05 14:10:38,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:10:38,941 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:38,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:39,015 INFO L225 Difference]: With dead ends: 34116 [2021-06-05 14:10:39,016 INFO L226 Difference]: Without dead ends: 34111 [2021-06-05 14:10:39,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:10:39,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34111 states. [2021-06-05 14:10:39,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34111 to 33690. [2021-06-05 14:10:39,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33690 states, 33689 states have (on average 3.4328712636172045) internal successors, (115650), 33689 states have internal predecessors, (115650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33690 states to 33690 states and 115650 transitions. [2021-06-05 14:10:39,793 INFO L78 Accepts]: Start accepts. Automaton has 33690 states and 115650 transitions. Word has length 22 [2021-06-05 14:10:39,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:39,793 INFO L482 AbstractCegarLoop]: Abstraction has 33690 states and 115650 transitions. [2021-06-05 14:10:39,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:39,793 INFO L276 IsEmpty]: Start isEmpty. Operand 33690 states and 115650 transitions. [2021-06-05 14:10:39,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:39,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:39,802 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:40,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21586 [2021-06-05 14:10:40,003 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:40,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:40,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1538801078, now seen corresponding path program 221 times [2021-06-05 14:10:40,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:40,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279977790] [2021-06-05 14:10:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:40,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:40,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279977790] [2021-06-05 14:10:40,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279977790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:40,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502477022] [2021-06-05 14:10:40,118 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 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 14:10:40,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:10:40,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:40,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:40,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:40,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502477022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:40,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:40,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:40,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217464657] [2021-06-05 14:10:40,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:40,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:40,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:40,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:40,188 INFO L87 Difference]: Start difference. First operand 33690 states and 115650 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:40,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:40,487 INFO L93 Difference]: Finished difference Result 36368 states and 123286 transitions. [2021-06-05 14:10:40,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:10:40,488 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:40,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:40,571 INFO L225 Difference]: With dead ends: 36368 [2021-06-05 14:10:40,571 INFO L226 Difference]: Without dead ends: 36368 [2021-06-05 14:10:40,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 193.3ms TimeCoverageRelationStatistics Valid=330, Invalid=600, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:10:40,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36368 states. [2021-06-05 14:10:41,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36368 to 27032. [2021-06-05 14:10:41,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27032 states, 27031 states have (on average 3.4189634123783805) internal successors, (92418), 27031 states have internal predecessors, (92418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:41,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27032 states to 27032 states and 92418 transitions. [2021-06-05 14:10:41,348 INFO L78 Accepts]: Start accepts. Automaton has 27032 states and 92418 transitions. Word has length 22 [2021-06-05 14:10:41,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:41,348 INFO L482 AbstractCegarLoop]: Abstraction has 27032 states and 92418 transitions. [2021-06-05 14:10:41,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:41,348 INFO L276 IsEmpty]: Start isEmpty. Operand 27032 states and 92418 transitions. [2021-06-05 14:10:41,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:41,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:41,357 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:41,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21587 [2021-06-05 14:10:41,573 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:41,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:41,573 INFO L82 PathProgramCache]: Analyzing trace with hash -219663911, now seen corresponding path program 222 times [2021-06-05 14:10:41,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:41,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146813832] [2021-06-05 14:10:41,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:41,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:41,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146813832] [2021-06-05 14:10:41,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146813832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:41,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705115661] [2021-06-05 14:10:41,642 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 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 14:10:41,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:10:41,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:41,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:41,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:41,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705115661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:41,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:41,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:41,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302710696] [2021-06-05 14:10:41,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:41,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:41,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:41,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:41,705 INFO L87 Difference]: Start difference. First operand 27032 states and 92418 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:41,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:41,995 INFO L93 Difference]: Finished difference Result 27914 states and 94767 transitions. [2021-06-05 14:10:41,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:10:41,996 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:41,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:42,050 INFO L225 Difference]: With dead ends: 27914 [2021-06-05 14:10:42,050 INFO L226 Difference]: Without dead ends: 27908 [2021-06-05 14:10:42,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=348, Invalid=708, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:10:42,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27908 states. [2021-06-05 14:10:42,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27908 to 27045. [2021-06-05 14:10:42,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27045 states, 27044 states have (on average 3.419168762017453) internal successors, (92468), 27044 states have internal predecessors, (92468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:42,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27045 states to 27045 states and 92468 transitions. [2021-06-05 14:10:42,804 INFO L78 Accepts]: Start accepts. Automaton has 27045 states and 92468 transitions. Word has length 22 [2021-06-05 14:10:42,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:42,804 INFO L482 AbstractCegarLoop]: Abstraction has 27045 states and 92468 transitions. [2021-06-05 14:10:42,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:42,804 INFO L276 IsEmpty]: Start isEmpty. Operand 27045 states and 92468 transitions. [2021-06-05 14:10:42,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:42,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:42,812 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:43,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21588 [2021-06-05 14:10:43,013 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:43,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:43,013 INFO L82 PathProgramCache]: Analyzing trace with hash -55666140, now seen corresponding path program 223 times [2021-06-05 14:10:43,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:43,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130547323] [2021-06-05 14:10:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:43,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:43,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130547323] [2021-06-05 14:10:43,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130547323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:43,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990647684] [2021-06-05 14:10:43,078 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 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 14:10:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:43,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:43,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:43,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990647684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:43,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:43,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:43,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429220854] [2021-06-05 14:10:43,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:43,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:43,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:43,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:43,161 INFO L87 Difference]: Start difference. First operand 27045 states and 92468 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:43,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:43,490 INFO L93 Difference]: Finished difference Result 32148 states and 108873 transitions. [2021-06-05 14:10:43,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:10:43,491 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:43,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:43,557 INFO L225 Difference]: With dead ends: 32148 [2021-06-05 14:10:43,557 INFO L226 Difference]: Without dead ends: 32148 [2021-06-05 14:10:43,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=399, Invalid=791, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:10:43,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32148 states. [2021-06-05 14:10:43,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32148 to 25053. [2021-06-05 14:10:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25053 states, 25052 states have (on average 3.419726967906754) internal successors, (85671), 25052 states have internal predecessors, (85671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:44,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25053 states to 25053 states and 85671 transitions. [2021-06-05 14:10:44,073 INFO L78 Accepts]: Start accepts. Automaton has 25053 states and 85671 transitions. Word has length 22 [2021-06-05 14:10:44,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:44,073 INFO L482 AbstractCegarLoop]: Abstraction has 25053 states and 85671 transitions. [2021-06-05 14:10:44,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:44,073 INFO L276 IsEmpty]: Start isEmpty. Operand 25053 states and 85671 transitions. [2021-06-05 14:10:44,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:44,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:44,082 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:44,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21589 [2021-06-05 14:10:44,303 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:44,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:44,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1064635363, now seen corresponding path program 224 times [2021-06-05 14:10:44,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:44,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301544319] [2021-06-05 14:10:44,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:44,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:44,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301544319] [2021-06-05 14:10:44,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301544319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:44,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673135505] [2021-06-05 14:10:44,378 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 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 14:10:44,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:10:44,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:44,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:44,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:44,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673135505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:44,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:44,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:44,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848435493] [2021-06-05 14:10:44,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:44,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:44,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:44,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:44,452 INFO L87 Difference]: Start difference. First operand 25053 states and 85671 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:44,778 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 14:10:44,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:44,971 INFO L93 Difference]: Finished difference Result 25874 states and 87890 transitions. [2021-06-05 14:10:44,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:10:44,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:44,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:45,024 INFO L225 Difference]: With dead ends: 25874 [2021-06-05 14:10:45,024 INFO L226 Difference]: Without dead ends: 25867 [2021-06-05 14:10:45,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 379.2ms TimeCoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:10:45,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25867 states. [2021-06-05 14:10:45,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25867 to 25080. [2021-06-05 14:10:45,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25080 states, 25079 states have (on average 3.419474460704175) internal successors, (85757), 25079 states have internal predecessors, (85757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:45,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25080 states to 25080 states and 85757 transitions. [2021-06-05 14:10:45,487 INFO L78 Accepts]: Start accepts. Automaton has 25080 states and 85757 transitions. Word has length 22 [2021-06-05 14:10:45,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:45,487 INFO L482 AbstractCegarLoop]: Abstraction has 25080 states and 85757 transitions. [2021-06-05 14:10:45,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:45,487 INFO L276 IsEmpty]: Start isEmpty. Operand 25080 states and 85757 transitions. [2021-06-05 14:10:45,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:45,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:45,495 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:45,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21590 [2021-06-05 14:10:45,709 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:45,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:45,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1323123318, now seen corresponding path program 225 times [2021-06-05 14:10:45,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:45,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658555573] [2021-06-05 14:10:45,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:45,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:45,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658555573] [2021-06-05 14:10:45,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658555573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:45,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909898749] [2021-06-05 14:10:45,774 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 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 14:10:45,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:10:45,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:45,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:45,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:45,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909898749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:45,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:45,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:45,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557837707] [2021-06-05 14:10:45,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:45,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:45,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:45,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:45,845 INFO L87 Difference]: Start difference. First operand 25080 states and 85757 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:46,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:46,282 INFO L93 Difference]: Finished difference Result 27927 states and 94333 transitions. [2021-06-05 14:10:46,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 14:10:46,283 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:46,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:46,337 INFO L225 Difference]: With dead ends: 27927 [2021-06-05 14:10:46,337 INFO L226 Difference]: Without dead ends: 27927 [2021-06-05 14:10:46,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=642, Invalid=1250, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:10:46,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27927 states. [2021-06-05 14:10:46,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27927 to 25274. [2021-06-05 14:10:46,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25274 states, 25273 states have (on average 3.42104221896886) internal successors, (86460), 25273 states have internal predecessors, (86460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:46,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25274 states to 25274 states and 86460 transitions. [2021-06-05 14:10:46,898 INFO L78 Accepts]: Start accepts. Automaton has 25274 states and 86460 transitions. Word has length 22 [2021-06-05 14:10:46,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:46,898 INFO L482 AbstractCegarLoop]: Abstraction has 25274 states and 86460 transitions. [2021-06-05 14:10:46,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:46,898 INFO L276 IsEmpty]: Start isEmpty. Operand 25274 states and 86460 transitions. [2021-06-05 14:10:46,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:46,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:46,906 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:47,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21591,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:47,107 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:47,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:47,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1967599235, now seen corresponding path program 226 times [2021-06-05 14:10:47,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:47,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910183685] [2021-06-05 14:10:47,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:47,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:47,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910183685] [2021-06-05 14:10:47,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910183685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:47,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894907943] [2021-06-05 14:10:47,175 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 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 14:10:47,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:10:47,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:47,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:47,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:47,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894907943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:47,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:47,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:47,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884975281] [2021-06-05 14:10:47,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:47,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:47,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:47,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:47,254 INFO L87 Difference]: Start difference. First operand 25274 states and 86460 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:47,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:47,535 INFO L93 Difference]: Finished difference Result 27147 states and 92076 transitions. [2021-06-05 14:10:47,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:10:47,536 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:47,592 INFO L225 Difference]: With dead ends: 27147 [2021-06-05 14:10:47,592 INFO L226 Difference]: Without dead ends: 27142 [2021-06-05 14:10:47,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:10:47,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27142 states. [2021-06-05 14:10:48,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27142 to 25361. [2021-06-05 14:10:48,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25361 states, 25360 states have (on average 3.4214511041009463) internal successors, (86768), 25360 states have internal predecessors, (86768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25361 states to 25361 states and 86768 transitions. [2021-06-05 14:10:48,174 INFO L78 Accepts]: Start accepts. Automaton has 25361 states and 86768 transitions. Word has length 22 [2021-06-05 14:10:48,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:48,174 INFO L482 AbstractCegarLoop]: Abstraction has 25361 states and 86768 transitions. [2021-06-05 14:10:48,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:48,174 INFO L276 IsEmpty]: Start isEmpty. Operand 25361 states and 86768 transitions. [2021-06-05 14:10:48,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:48,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:48,182 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:48,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21592,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:48,383 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:48,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:48,383 INFO L82 PathProgramCache]: Analyzing trace with hash 205562928, now seen corresponding path program 227 times [2021-06-05 14:10:48,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:48,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729496080] [2021-06-05 14:10:48,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:48,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:48,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729496080] [2021-06-05 14:10:48,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729496080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:48,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407894837] [2021-06-05 14:10:48,450 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 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 14:10:48,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:10:48,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:48,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:48,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:48,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407894837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:48,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:48,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:48,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510143948] [2021-06-05 14:10:48,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:48,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:48,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:48,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:48,530 INFO L87 Difference]: Start difference. First operand 25361 states and 86768 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:48,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:48,770 INFO L93 Difference]: Finished difference Result 27451 states and 92974 transitions. [2021-06-05 14:10:48,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:10:48,770 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:48,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:48,828 INFO L225 Difference]: With dead ends: 27451 [2021-06-05 14:10:48,829 INFO L226 Difference]: Without dead ends: 27451 [2021-06-05 14:10:48,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:10:48,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27451 states. [2021-06-05 14:10:49,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27451 to 24554. [2021-06-05 14:10:49,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24554 states, 24553 states have (on average 3.42544699222091) internal successors, (84105), 24553 states have internal predecessors, (84105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:49,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24554 states to 24554 states and 84105 transitions. [2021-06-05 14:10:49,452 INFO L78 Accepts]: Start accepts. Automaton has 24554 states and 84105 transitions. Word has length 22 [2021-06-05 14:10:49,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:49,452 INFO L482 AbstractCegarLoop]: Abstraction has 24554 states and 84105 transitions. [2021-06-05 14:10:49,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:49,452 INFO L276 IsEmpty]: Start isEmpty. Operand 24554 states and 84105 transitions. [2021-06-05 14:10:49,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:49,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:49,460 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:49,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21593,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:49,661 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:49,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:49,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1524700095, now seen corresponding path program 228 times [2021-06-05 14:10:49,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:49,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508264108] [2021-06-05 14:10:49,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:49,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:49,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508264108] [2021-06-05 14:10:49,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508264108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:49,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861994261] [2021-06-05 14:10:49,729 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 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 14:10:49,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:10:49,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:49,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:49,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:49,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861994261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:49,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:49,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:49,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730394903] [2021-06-05 14:10:49,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:49,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:49,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:49,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:49,792 INFO L87 Difference]: Start difference. First operand 24554 states and 84105 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:50,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:50,014 INFO L93 Difference]: Finished difference Result 25024 states and 85353 transitions. [2021-06-05 14:10:50,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:10:50,015 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:50,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:50,064 INFO L225 Difference]: With dead ends: 25024 [2021-06-05 14:10:50,064 INFO L226 Difference]: Without dead ends: 25018 [2021-06-05 14:10:50,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:10:50,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25018 states. [2021-06-05 14:10:50,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25018 to 24554. [2021-06-05 14:10:50,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24554 states, 24553 states have (on average 3.4254062640003258) internal successors, (84104), 24553 states have internal predecessors, (84104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:50,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24554 states to 24554 states and 84104 transitions. [2021-06-05 14:10:50,472 INFO L78 Accepts]: Start accepts. Automaton has 24554 states and 84104 transitions. Word has length 22 [2021-06-05 14:10:50,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:50,473 INFO L482 AbstractCegarLoop]: Abstraction has 24554 states and 84104 transitions. [2021-06-05 14:10:50,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:50,473 INFO L276 IsEmpty]: Start isEmpty. Operand 24554 states and 84104 transitions. [2021-06-05 14:10:50,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:50,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:50,481 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:50,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21594 [2021-06-05 14:10:50,688 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:50,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:50,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1688697866, now seen corresponding path program 229 times [2021-06-05 14:10:50,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:50,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826962953] [2021-06-05 14:10:50,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:50,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:50,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826962953] [2021-06-05 14:10:50,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826962953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:50,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822068492] [2021-06-05 14:10:50,754 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 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 14:10:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:50,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:50,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:50,821 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:50,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822068492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:50,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:50,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:50,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990204234] [2021-06-05 14:10:50,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:50,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:50,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:50,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:50,821 INFO L87 Difference]: Start difference. First operand 24554 states and 84104 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:51,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:51,070 INFO L93 Difference]: Finished difference Result 25874 states and 87934 transitions. [2021-06-05 14:10:51,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:10:51,070 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:51,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:51,126 INFO L225 Difference]: With dead ends: 25874 [2021-06-05 14:10:51,126 INFO L226 Difference]: Without dead ends: 25874 [2021-06-05 14:10:51,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:10:51,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25874 states. [2021-06-05 14:10:51,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25874 to 24995. [2021-06-05 14:10:51,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24995 states, 24994 states have (on average 3.425342082099704) internal successors, (85613), 24994 states have internal predecessors, (85613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:51,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24995 states to 24995 states and 85613 transitions. [2021-06-05 14:10:51,713 INFO L78 Accepts]: Start accepts. Automaton has 24995 states and 85613 transitions. Word has length 22 [2021-06-05 14:10:51,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:51,713 INFO L482 AbstractCegarLoop]: Abstraction has 24995 states and 85613 transitions. [2021-06-05 14:10:51,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:51,713 INFO L276 IsEmpty]: Start isEmpty. Operand 24995 states and 85613 transitions. [2021-06-05 14:10:51,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:51,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:51,721 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:51,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21595 [2021-06-05 14:10:51,921 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:51,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:51,922 INFO L82 PathProgramCache]: Analyzing trace with hash 679728643, now seen corresponding path program 230 times [2021-06-05 14:10:51,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:51,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794486319] [2021-06-05 14:10:51,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:51,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:51,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794486319] [2021-06-05 14:10:51,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794486319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:51,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237287870] [2021-06-05 14:10:51,995 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 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 14:10:52,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:10:52,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:52,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:52,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:52,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237287870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:52,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:52,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:52,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529942682] [2021-06-05 14:10:52,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:52,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:52,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:52,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:52,075 INFO L87 Difference]: Start difference. First operand 24995 states and 85613 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:52,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:52,306 INFO L93 Difference]: Finished difference Result 25438 states and 86795 transitions. [2021-06-05 14:10:52,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:10:52,307 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:52,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:52,362 INFO L225 Difference]: With dead ends: 25438 [2021-06-05 14:10:52,362 INFO L226 Difference]: Without dead ends: 25431 [2021-06-05 14:10:52,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:10:52,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25431 states. [2021-06-05 14:10:52,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25431 to 24995. [2021-06-05 14:10:52,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24995 states, 24994 states have (on average 3.4253020724973995) internal successors, (85612), 24994 states have internal predecessors, (85612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:52,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24995 states to 24995 states and 85612 transitions. [2021-06-05 14:10:52,939 INFO L78 Accepts]: Start accepts. Automaton has 24995 states and 85612 transitions. Word has length 22 [2021-06-05 14:10:52,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:52,939 INFO L482 AbstractCegarLoop]: Abstraction has 24995 states and 85612 transitions. [2021-06-05 14:10:52,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:52,939 INFO L276 IsEmpty]: Start isEmpty. Operand 24995 states and 85612 transitions. [2021-06-05 14:10:52,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:52,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:52,947 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:53,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21596 [2021-06-05 14:10:53,147 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:53,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:53,148 INFO L82 PathProgramCache]: Analyzing trace with hash 421240688, now seen corresponding path program 231 times [2021-06-05 14:10:53,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:53,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022914324] [2021-06-05 14:10:53,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:53,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:53,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022914324] [2021-06-05 14:10:53,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022914324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:53,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135216852] [2021-06-05 14:10:53,222 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 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 14:10:53,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:10:53,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:53,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:53,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:53,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135216852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:53,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:53,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:53,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672618791] [2021-06-05 14:10:53,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:53,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:53,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:53,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:53,295 INFO L87 Difference]: Start difference. First operand 24995 states and 85612 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:53,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:53,663 INFO L93 Difference]: Finished difference Result 25599 states and 86951 transitions. [2021-06-05 14:10:53,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:10:53,663 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:53,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:53,721 INFO L225 Difference]: With dead ends: 25599 [2021-06-05 14:10:53,721 INFO L226 Difference]: Without dead ends: 25599 [2021-06-05 14:10:53,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 256.7ms TimeCoverageRelationStatistics Valid=518, Invalid=1042, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:10:53,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25599 states. [2021-06-05 14:10:54,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25599 to 25031. [2021-06-05 14:10:54,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25031 states, 25030 states have (on average 3.4251298441869755) internal successors, (85731), 25030 states have internal predecessors, (85731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:54,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25031 states to 25031 states and 85731 transitions. [2021-06-05 14:10:54,222 INFO L78 Accepts]: Start accepts. Automaton has 25031 states and 85731 transitions. Word has length 22 [2021-06-05 14:10:54,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:54,222 INFO L482 AbstractCegarLoop]: Abstraction has 25031 states and 85731 transitions. [2021-06-05 14:10:54,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:54,222 INFO L276 IsEmpty]: Start isEmpty. Operand 25031 states and 85731 transitions. [2021-06-05 14:10:54,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:54,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:54,230 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:54,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21597 [2021-06-05 14:10:54,446 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:54,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:54,446 INFO L82 PathProgramCache]: Analyzing trace with hash 255417407, now seen corresponding path program 232 times [2021-06-05 14:10:54,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:54,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542960635] [2021-06-05 14:10:54,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:54,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:54,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542960635] [2021-06-05 14:10:54,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542960635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:54,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972957187] [2021-06-05 14:10:54,672 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 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 14:10:54,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:10:54,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:54,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:54,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:54,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972957187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:54,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:54,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:54,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408723797] [2021-06-05 14:10:54,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:54,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:54,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:54,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:54,759 INFO L87 Difference]: Start difference. First operand 25031 states and 85731 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:54,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:54,988 INFO L93 Difference]: Finished difference Result 25442 states and 86842 transitions. [2021-06-05 14:10:54,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:10:54,989 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:54,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:55,036 INFO L225 Difference]: With dead ends: 25442 [2021-06-05 14:10:55,036 INFO L226 Difference]: Without dead ends: 25434 [2021-06-05 14:10:55,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:10:55,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25434 states. [2021-06-05 14:10:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25434 to 25031. [2021-06-05 14:10:55,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25031 states, 25030 states have (on average 3.425089892129445) internal successors, (85730), 25030 states have internal predecessors, (85730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:55,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25031 states to 25031 states and 85730 transitions. [2021-06-05 14:10:55,477 INFO L78 Accepts]: Start accepts. Automaton has 25031 states and 85730 transitions. Word has length 22 [2021-06-05 14:10:55,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:55,477 INFO L482 AbstractCegarLoop]: Abstraction has 25031 states and 85730 transitions. [2021-06-05 14:10:55,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:55,477 INFO L276 IsEmpty]: Start isEmpty. Operand 25031 states and 85730 transitions. [2021-06-05 14:10:55,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:55,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:55,485 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:55,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21598 [2021-06-05 14:10:55,701 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:55,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:55,701 INFO L82 PathProgramCache]: Analyzing trace with hash -215226166, now seen corresponding path program 233 times [2021-06-05 14:10:55,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:55,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224165424] [2021-06-05 14:10:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:55,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:55,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224165424] [2021-06-05 14:10:55,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224165424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:55,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777590220] [2021-06-05 14:10:55,774 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 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 14:10:55,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:10:55,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:55,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:55,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:55,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777590220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:55,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:55,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:10:55,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889408116] [2021-06-05 14:10:55,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:10:55,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:55,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:10:55,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:55,844 INFO L87 Difference]: Start difference. First operand 25031 states and 85730 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:56,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:56,444 INFO L93 Difference]: Finished difference Result 25692 states and 87163 transitions. [2021-06-05 14:10:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 14:10:56,444 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:56,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:56,494 INFO L225 Difference]: With dead ends: 25692 [2021-06-05 14:10:56,494 INFO L226 Difference]: Without dead ends: 25692 [2021-06-05 14:10:56,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 331.0ms TimeCoverageRelationStatistics Valid=753, Invalid=1503, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 14:10:56,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25692 states. [2021-06-05 14:10:56,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25692 to 25022. [2021-06-05 14:10:56,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25022 states, 25021 states have (on average 3.4252427960513168) internal successors, (85703), 25021 states have internal predecessors, (85703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25022 states to 25022 states and 85703 transitions. [2021-06-05 14:10:56,911 INFO L78 Accepts]: Start accepts. Automaton has 25022 states and 85703 transitions. Word has length 22 [2021-06-05 14:10:56,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:56,911 INFO L482 AbstractCegarLoop]: Abstraction has 25022 states and 85703 transitions. [2021-06-05 14:10:56,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:56,911 INFO L276 IsEmpty]: Start isEmpty. Operand 25022 states and 85703 transitions. [2021-06-05 14:10:56,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:56,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:56,919 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:57,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21599 [2021-06-05 14:10:57,133 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:57,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:57,133 INFO L82 PathProgramCache]: Analyzing trace with hash -457840953, now seen corresponding path program 234 times [2021-06-05 14:10:57,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:57,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828824508] [2021-06-05 14:10:57,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:57,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:57,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828824508] [2021-06-05 14:10:57,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828824508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:57,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113002071] [2021-06-05 14:10:57,190 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 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 14:10:57,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:10:57,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:57,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:57,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:10:57,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113002071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:57,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:57,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:10:57,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493757402] [2021-06-05 14:10:57,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:10:57,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:57,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:10:57,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:10:57,253 INFO L87 Difference]: Start difference. First operand 25022 states and 85703 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:57,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:57,423 INFO L93 Difference]: Finished difference Result 25353 states and 86224 transitions. [2021-06-05 14:10:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:10:57,423 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:57,479 INFO L225 Difference]: With dead ends: 25353 [2021-06-05 14:10:57,480 INFO L226 Difference]: Without dead ends: 25353 [2021-06-05 14:10:57,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=119, Invalid=153, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:57,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25353 states. [2021-06-05 14:10:57,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25353 to 25033. [2021-06-05 14:10:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25033 states, 25032 states have (on average 3.4251757750079896) internal successors, (85739), 25032 states have internal predecessors, (85739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:58,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25033 states to 25033 states and 85739 transitions. [2021-06-05 14:10:58,066 INFO L78 Accepts]: Start accepts. Automaton has 25033 states and 85739 transitions. Word has length 22 [2021-06-05 14:10:58,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:58,066 INFO L482 AbstractCegarLoop]: Abstraction has 25033 states and 85739 transitions. [2021-06-05 14:10:58,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:58,066 INFO L276 IsEmpty]: Start isEmpty. Operand 25033 states and 85739 transitions. [2021-06-05 14:10:58,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:58,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:58,075 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:58,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21600,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:58,291 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:58,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:58,291 INFO L82 PathProgramCache]: Analyzing trace with hash 625449180, now seen corresponding path program 235 times [2021-06-05 14:10:58,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:58,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4754208] [2021-06-05 14:10:58,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:58,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:58,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4754208] [2021-06-05 14:10:58,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4754208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:58,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796531383] [2021-06-05 14:10:58,345 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 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 14:10:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:58,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:58,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:10:58,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796531383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:58,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:58,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:10:58,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224454145] [2021-06-05 14:10:58,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:10:58,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:58,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:10:58,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:10:58,406 INFO L87 Difference]: Start difference. First operand 25033 states and 85739 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:58,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:58,656 INFO L93 Difference]: Finished difference Result 25371 states and 86392 transitions. [2021-06-05 14:10:58,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:10:58,657 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:10:58,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:58,714 INFO L225 Difference]: With dead ends: 25371 [2021-06-05 14:10:58,714 INFO L226 Difference]: Without dead ends: 25367 [2021-06-05 14:10:58,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:10:58,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25367 states. [2021-06-05 14:10:59,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25367 to 25136. [2021-06-05 14:10:59,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25136 states, 25135 states have (on average 3.4247065844440026) internal successors, (86080), 25135 states have internal predecessors, (86080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:59,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25136 states to 25136 states and 86080 transitions. [2021-06-05 14:10:59,216 INFO L78 Accepts]: Start accepts. Automaton has 25136 states and 86080 transitions. Word has length 22 [2021-06-05 14:10:59,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:59,216 INFO L482 AbstractCegarLoop]: Abstraction has 25136 states and 86080 transitions. [2021-06-05 14:10:59,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:59,216 INFO L276 IsEmpty]: Start isEmpty. Operand 25136 states and 86080 transitions. [2021-06-05 14:10:59,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:59,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:59,225 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:59,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21601 [2021-06-05 14:10:59,425 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:59,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:59,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1282251357, now seen corresponding path program 236 times [2021-06-05 14:10:59,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:59,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152917767] [2021-06-05 14:10:59,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:59,735 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:59,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:59,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152917767] [2021-06-05 14:10:59,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152917767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:59,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547140346] [2021-06-05 14:10:59,735 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 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 14:10:59,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:10:59,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:59,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:10:59,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:59,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547140346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:59,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:59,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:10:59,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700775582] [2021-06-05 14:10:59,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:10:59,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:59,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:10:59,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:10:59,793 INFO L87 Difference]: Start difference. First operand 25136 states and 86080 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:00,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:00,065 INFO L93 Difference]: Finished difference Result 25448 states and 86549 transitions. [2021-06-05 14:11:00,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:11:00,065 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:00,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:00,122 INFO L225 Difference]: With dead ends: 25448 [2021-06-05 14:11:00,122 INFO L226 Difference]: Without dead ends: 25447 [2021-06-05 14:11:00,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 359.1ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:11:00,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25447 states. [2021-06-05 14:11:00,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25447 to 25136. [2021-06-05 14:11:00,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25136 states, 25135 states have (on average 3.424070021881838) internal successors, (86064), 25135 states have internal predecessors, (86064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:00,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25136 states to 25136 states and 86064 transitions. [2021-06-05 14:11:00,625 INFO L78 Accepts]: Start accepts. Automaton has 25136 states and 86064 transitions. Word has length 22 [2021-06-05 14:11:00,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:00,625 INFO L482 AbstractCegarLoop]: Abstraction has 25136 states and 86064 transitions. [2021-06-05 14:11:00,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:00,625 INFO L276 IsEmpty]: Start isEmpty. Operand 25136 states and 86064 transitions. [2021-06-05 14:11:00,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:00,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:00,634 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:00,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21602,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:00,844 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:00,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:00,844 INFO L82 PathProgramCache]: Analyzing trace with hash -2090297206, now seen corresponding path program 237 times [2021-06-05 14:11:00,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:00,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260410501] [2021-06-05 14:11:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:00,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:00,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260410501] [2021-06-05 14:11:00,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260410501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:00,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298209905] [2021-06-05 14:11:00,903 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 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 14:11:00,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:11:00,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:00,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:00,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:00,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298209905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:00,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:00,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:11:00,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013776920] [2021-06-05 14:11:00,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:00,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:00,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:00,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:00,975 INFO L87 Difference]: Start difference. First operand 25136 states and 86064 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:01,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:01,160 INFO L93 Difference]: Finished difference Result 25635 states and 87128 transitions. [2021-06-05 14:11:01,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:11:01,160 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:01,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:01,222 INFO L225 Difference]: With dead ends: 25635 [2021-06-05 14:11:01,222 INFO L226 Difference]: Without dead ends: 25635 [2021-06-05 14:11:01,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:11:01,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25635 states. [2021-06-05 14:11:01,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25635 to 25162. [2021-06-05 14:11:01,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25162 states, 25161 states have (on average 3.4235920670879536) internal successors, (86141), 25161 states have internal predecessors, (86141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:01,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25162 states to 25162 states and 86141 transitions. [2021-06-05 14:11:01,976 INFO L78 Accepts]: Start accepts. Automaton has 25162 states and 86141 transitions. Word has length 22 [2021-06-05 14:11:01,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:01,976 INFO L482 AbstractCegarLoop]: Abstraction has 25162 states and 86141 transitions. [2021-06-05 14:11:01,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:01,976 INFO L276 IsEmpty]: Start isEmpty. Operand 25162 states and 86141 transitions. [2021-06-05 14:11:01,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:01,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:01,985 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:02,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21603,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:02,201 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:02,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:02,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1302102631, now seen corresponding path program 238 times [2021-06-05 14:11:02,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:02,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273510129] [2021-06-05 14:11:02,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:02,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:02,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273510129] [2021-06-05 14:11:02,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273510129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:02,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000695706] [2021-06-05 14:11:02,497 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 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 14:11:02,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:02,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:02,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:02,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:02,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000695706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:02,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:02,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:11:02,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627800743] [2021-06-05 14:11:02,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:11:02,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:02,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:11:02,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:11:02,957 INFO L87 Difference]: Start difference. First operand 25162 states and 86141 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:03,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:03,221 INFO L93 Difference]: Finished difference Result 25479 states and 86617 transitions. [2021-06-05 14:11:03,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:11:03,233 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:03,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:03,295 INFO L225 Difference]: With dead ends: 25479 [2021-06-05 14:11:03,295 INFO L226 Difference]: Without dead ends: 25477 [2021-06-05 14:11:03,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 474.1ms TimeCoverageRelationStatistics Valid=274, Invalid=482, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:11:03,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25477 states. [2021-06-05 14:11:03,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25477 to 25162. [2021-06-05 14:11:03,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25162 states, 25161 states have (on average 3.4234728349429675) internal successors, (86138), 25161 states have internal predecessors, (86138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:03,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25162 states to 25162 states and 86138 transitions. [2021-06-05 14:11:03,907 INFO L78 Accepts]: Start accepts. Automaton has 25162 states and 86138 transitions. Word has length 22 [2021-06-05 14:11:03,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:03,907 INFO L482 AbstractCegarLoop]: Abstraction has 25162 states and 86138 transitions. [2021-06-05 14:11:03,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:03,907 INFO L276 IsEmpty]: Start isEmpty. Operand 25162 states and 86138 transitions. [2021-06-05 14:11:03,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:03,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:03,915 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:04,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21604,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:04,121 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:04,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:04,121 INFO L82 PathProgramCache]: Analyzing trace with hash 475622756, now seen corresponding path program 239 times [2021-06-05 14:11:04,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:04,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58574043] [2021-06-05 14:11:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:04,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:04,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58574043] [2021-06-05 14:11:04,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58574043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:04,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332003927] [2021-06-05 14:11:04,198 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 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 14:11:04,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:11:04,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:04,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:04,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:04,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332003927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:04,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:04,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:11:04,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759011236] [2021-06-05 14:11:04,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:11:04,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:04,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:11:04,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:11:04,281 INFO L87 Difference]: Start difference. First operand 25162 states and 86138 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:04,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:04,553 INFO L93 Difference]: Finished difference Result 25812 states and 87617 transitions. [2021-06-05 14:11:04,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:11:04,554 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:04,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:04,610 INFO L225 Difference]: With dead ends: 25812 [2021-06-05 14:11:04,610 INFO L226 Difference]: Without dead ends: 25812 [2021-06-05 14:11:04,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:11:04,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25812 states. [2021-06-05 14:11:05,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25812 to 25201. [2021-06-05 14:11:05,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25201 states, 25200 states have (on average 3.4220634920634923) internal successors, (86236), 25200 states have internal predecessors, (86236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25201 states to 25201 states and 86236 transitions. [2021-06-05 14:11:05,119 INFO L78 Accepts]: Start accepts. Automaton has 25201 states and 86236 transitions. Word has length 22 [2021-06-05 14:11:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:05,119 INFO L482 AbstractCegarLoop]: Abstraction has 25201 states and 86236 transitions. [2021-06-05 14:11:05,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:05,120 INFO L276 IsEmpty]: Start isEmpty. Operand 25201 states and 86236 transitions. [2021-06-05 14:11:05,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:05,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:05,128 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:05,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21605,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:05,328 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:05,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:05,328 INFO L82 PathProgramCache]: Analyzing trace with hash 187302365, now seen corresponding path program 240 times [2021-06-05 14:11:05,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:05,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487934800] [2021-06-05 14:11:05,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:05,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:05,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487934800] [2021-06-05 14:11:05,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487934800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:05,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830917240] [2021-06-05 14:11:05,396 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 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 14:11:05,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:11:05,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:05,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:05,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:05,460 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:05,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830917240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:05,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:05,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:11:05,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611119107] [2021-06-05 14:11:05,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:11:05,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:05,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:11:05,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:11:05,461 INFO L87 Difference]: Start difference. First operand 25201 states and 86236 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:05,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:05,905 INFO L93 Difference]: Finished difference Result 30537 states and 103865 transitions. [2021-06-05 14:11:05,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:11:05,905 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:05,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:05,972 INFO L225 Difference]: With dead ends: 30537 [2021-06-05 14:11:05,972 INFO L226 Difference]: Without dead ends: 30534 [2021-06-05 14:11:05,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:11:05,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30534 states. [2021-06-05 14:11:06,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30534 to 25737. [2021-06-05 14:11:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25737 states, 25736 states have (on average 3.426173453528132) internal successors, (88176), 25736 states have internal predecessors, (88176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:06,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25737 states to 25737 states and 88176 transitions. [2021-06-05 14:11:06,523 INFO L78 Accepts]: Start accepts. Automaton has 25737 states and 88176 transitions. Word has length 22 [2021-06-05 14:11:06,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:06,523 INFO L482 AbstractCegarLoop]: Abstraction has 25737 states and 88176 transitions. [2021-06-05 14:11:06,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:06,524 INFO L276 IsEmpty]: Start isEmpty. Operand 25737 states and 88176 transitions. [2021-06-05 14:11:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:06,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:06,532 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:06,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21606,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:06,748 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:06,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:06,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1585237046, now seen corresponding path program 241 times [2021-06-05 14:11:06,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:06,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443931410] [2021-06-05 14:11:06,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:07,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:07,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443931410] [2021-06-05 14:11:07,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443931410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:07,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948167550] [2021-06-05 14:11:07,073 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 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 14:11:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:07,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:07,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:07,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948167550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:07,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:07,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:11:07,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732126904] [2021-06-05 14:11:07,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:11:07,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:07,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:11:07,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:11:07,145 INFO L87 Difference]: Start difference. First operand 25737 states and 88176 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:07,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:07,363 INFO L93 Difference]: Finished difference Result 32821 states and 111446 transitions. [2021-06-05 14:11:07,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:11:07,363 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:07,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:07,437 INFO L225 Difference]: With dead ends: 32821 [2021-06-05 14:11:07,437 INFO L226 Difference]: Without dead ends: 32821 [2021-06-05 14:11:07,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 319.3ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:11:07,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32821 states. [2021-06-05 14:11:08,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32821 to 31903. [2021-06-05 14:11:08,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31903 states, 31902 states have (on average 3.4264622907654694) internal successors, (109311), 31902 states have internal predecessors, (109311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:08,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31903 states to 31903 states and 109311 transitions. [2021-06-05 14:11:08,153 INFO L78 Accepts]: Start accepts. Automaton has 31903 states and 109311 transitions. Word has length 22 [2021-06-05 14:11:08,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:08,153 INFO L482 AbstractCegarLoop]: Abstraction has 31903 states and 109311 transitions. [2021-06-05 14:11:08,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:08,153 INFO L276 IsEmpty]: Start isEmpty. Operand 31903 states and 109311 transitions. [2021-06-05 14:11:08,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:08,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:08,162 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:08,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21607 [2021-06-05 14:11:08,379 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:08,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:08,379 INFO L82 PathProgramCache]: Analyzing trace with hash -885783015, now seen corresponding path program 242 times [2021-06-05 14:11:08,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:08,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034032966] [2021-06-05 14:11:08,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:08,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:08,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034032966] [2021-06-05 14:11:08,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034032966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:08,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547991874] [2021-06-05 14:11:08,439 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 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 14:11:08,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:11:08,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:08,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:08,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:08,504 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:08,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547991874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:08,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:08,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:11:08,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785492474] [2021-06-05 14:11:08,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:11:08,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:08,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:11:08,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:11:08,505 INFO L87 Difference]: Start difference. First operand 31903 states and 109311 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:08,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:08,771 INFO L93 Difference]: Finished difference Result 35145 states and 119531 transitions. [2021-06-05 14:11:08,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:11:08,771 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:08,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:08,848 INFO L225 Difference]: With dead ends: 35145 [2021-06-05 14:11:08,848 INFO L226 Difference]: Without dead ends: 35141 [2021-06-05 14:11:08,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:11:08,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35141 states. [2021-06-05 14:11:09,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35141 to 31927. [2021-06-05 14:11:09,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31927 states, 31926 states have (on average 3.426423604585604) internal successors, (109392), 31926 states have internal predecessors, (109392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:09,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31927 states to 31927 states and 109392 transitions. [2021-06-05 14:11:09,588 INFO L78 Accepts]: Start accepts. Automaton has 31927 states and 109392 transitions. Word has length 22 [2021-06-05 14:11:09,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:09,588 INFO L482 AbstractCegarLoop]: Abstraction has 31927 states and 109392 transitions. [2021-06-05 14:11:09,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:09,588 INFO L276 IsEmpty]: Start isEmpty. Operand 31927 states and 109392 transitions. [2021-06-05 14:11:09,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:09,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:09,597 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:09,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21608,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:09,806 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:09,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:09,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1047381468, now seen corresponding path program 243 times [2021-06-05 14:11:09,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:09,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109210329] [2021-06-05 14:11:09,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:09,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:09,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109210329] [2021-06-05 14:11:09,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109210329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:09,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664066340] [2021-06-05 14:11:09,890 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 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 14:11:09,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:11:09,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:09,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:09,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:09,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664066340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:09,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:09,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:11:09,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976288355] [2021-06-05 14:11:09,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:11:09,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:09,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:11:09,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:11:09,959 INFO L87 Difference]: Start difference. First operand 31927 states and 109392 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:10,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:10,151 INFO L93 Difference]: Finished difference Result 34058 states and 115874 transitions. [2021-06-05 14:11:10,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:11:10,151 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:10,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:10,224 INFO L225 Difference]: With dead ends: 34058 [2021-06-05 14:11:10,224 INFO L226 Difference]: Without dead ends: 34058 [2021-06-05 14:11:10,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:11:10,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34058 states. [2021-06-05 14:11:10,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34058 to 33786. [2021-06-05 14:11:10,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33786 states, 33785 states have (on average 3.4163978096788514) internal successors, (115423), 33785 states have internal predecessors, (115423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:11,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33786 states to 33786 states and 115423 transitions. [2021-06-05 14:11:11,082 INFO L78 Accepts]: Start accepts. Automaton has 33786 states and 115423 transitions. Word has length 22 [2021-06-05 14:11:11,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:11,082 INFO L482 AbstractCegarLoop]: Abstraction has 33786 states and 115423 transitions. [2021-06-05 14:11:11,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:11,082 INFO L276 IsEmpty]: Start isEmpty. Operand 33786 states and 115423 transitions. [2021-06-05 14:11:11,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:11,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:11,091 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:11,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21609 [2021-06-05 14:11:11,305 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:11,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:11,305 INFO L82 PathProgramCache]: Analyzing trace with hash 208308573, now seen corresponding path program 244 times [2021-06-05 14:11:11,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:11,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387508099] [2021-06-05 14:11:11,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:11,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:11,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387508099] [2021-06-05 14:11:11,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387508099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:11,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490999120] [2021-06-05 14:11:11,375 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 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 14:11:11,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:11,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:11,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:11,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:11,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490999120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:11,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:11,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:11,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108230941] [2021-06-05 14:11:11,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:11,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:11,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:11,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:11,437 INFO L87 Difference]: Start difference. First operand 33786 states and 115423 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:11,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:11,715 INFO L93 Difference]: Finished difference Result 36935 states and 125285 transitions. [2021-06-05 14:11:11,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:11:11,716 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:11,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:11,791 INFO L225 Difference]: With dead ends: 36935 [2021-06-05 14:11:11,791 INFO L226 Difference]: Without dead ends: 36930 [2021-06-05 14:11:11,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:11:11,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36930 states. [2021-06-05 14:11:12,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36930 to 34131. [2021-06-05 14:11:12,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34131 states, 34130 states have (on average 3.4184295341341926) internal successors, (116671), 34130 states have internal predecessors, (116671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:12,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34131 states to 34131 states and 116671 transitions. [2021-06-05 14:11:12,732 INFO L78 Accepts]: Start accepts. Automaton has 34131 states and 116671 transitions. Word has length 22 [2021-06-05 14:11:12,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:12,733 INFO L482 AbstractCegarLoop]: Abstraction has 34131 states and 116671 transitions. [2021-06-05 14:11:12,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:12,733 INFO L276 IsEmpty]: Start isEmpty. Operand 34131 states and 116671 transitions. [2021-06-05 14:11:12,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:12,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:12,741 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:12,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21610,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:12,942 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:12,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:12,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1553727734, now seen corresponding path program 245 times [2021-06-05 14:11:12,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:12,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815071742] [2021-06-05 14:11:12,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:13,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:13,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815071742] [2021-06-05 14:11:13,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815071742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:13,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342381216] [2021-06-05 14:11:13,005 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 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 14:11:13,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:11:13,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:13,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:13,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:13,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342381216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:13,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:13,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:13,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352071942] [2021-06-05 14:11:13,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:13,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:13,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:13,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:13,087 INFO L87 Difference]: Start difference. First operand 34131 states and 116671 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:13,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:13,338 INFO L93 Difference]: Finished difference Result 34565 states and 117528 transitions. [2021-06-05 14:11:13,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:11:13,339 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:13,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:13,428 INFO L225 Difference]: With dead ends: 34565 [2021-06-05 14:11:13,428 INFO L226 Difference]: Without dead ends: 34565 [2021-06-05 14:11:13,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:11:13,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34565 states. [2021-06-05 14:11:14,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34565 to 34136. [2021-06-05 14:11:14,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34136 states, 34135 states have (on average 3.4178995166251647) internal successors, (116670), 34135 states have internal predecessors, (116670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:14,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34136 states to 34136 states and 116670 transitions. [2021-06-05 14:11:14,347 INFO L78 Accepts]: Start accepts. Automaton has 34136 states and 116670 transitions. Word has length 22 [2021-06-05 14:11:14,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:14,347 INFO L482 AbstractCegarLoop]: Abstraction has 34136 states and 116670 transitions. [2021-06-05 14:11:14,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:14,347 INFO L276 IsEmpty]: Start isEmpty. Operand 34136 states and 116670 transitions. [2021-06-05 14:11:14,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:14,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:14,356 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:14,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21611 [2021-06-05 14:11:14,565 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:14,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:14,565 INFO L82 PathProgramCache]: Analyzing trace with hash -234590567, now seen corresponding path program 246 times [2021-06-05 14:11:14,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:14,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431263869] [2021-06-05 14:11:14,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:14,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:14,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431263869] [2021-06-05 14:11:14,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431263869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:14,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133536961] [2021-06-05 14:11:14,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:11:14,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:11:14,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:14,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:14,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:14,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133536961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:14,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:14,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:14,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947878803] [2021-06-05 14:11:14,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:14,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:14,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:14,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:14,695 INFO L87 Difference]: Start difference. First operand 34136 states and 116670 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:14,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:14,963 INFO L93 Difference]: Finished difference Result 34685 states and 118130 transitions. [2021-06-05 14:11:14,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:11:14,963 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:14,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:15,046 INFO L225 Difference]: With dead ends: 34685 [2021-06-05 14:11:15,046 INFO L226 Difference]: Without dead ends: 34679 [2021-06-05 14:11:15,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:11:15,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34679 states. [2021-06-05 14:11:15,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34679 to 34136. [2021-06-05 14:11:16,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34136 states, 34135 states have (on average 3.4178702211806065) internal successors, (116669), 34135 states have internal predecessors, (116669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:16,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34136 states to 34136 states and 116669 transitions. [2021-06-05 14:11:16,141 INFO L78 Accepts]: Start accepts. Automaton has 34136 states and 116669 transitions. Word has length 22 [2021-06-05 14:11:16,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:16,141 INFO L482 AbstractCegarLoop]: Abstraction has 34136 states and 116669 transitions. [2021-06-05 14:11:16,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:16,141 INFO L276 IsEmpty]: Start isEmpty. Operand 34136 states and 116669 transitions. [2021-06-05 14:11:16,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:16,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:16,150 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:16,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21612,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:16,366 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:16,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:16,370 INFO L82 PathProgramCache]: Analyzing trace with hash -70592796, now seen corresponding path program 247 times [2021-06-05 14:11:16,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:16,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469051969] [2021-06-05 14:11:16,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:16,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:16,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469051969] [2021-06-05 14:11:16,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469051969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:16,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488355421] [2021-06-05 14:11:16,447 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 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 14:11:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:16,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:16,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:16,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488355421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:16,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:16,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:16,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878033575] [2021-06-05 14:11:16,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:16,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:16,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:16,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:16,514 INFO L87 Difference]: Start difference. First operand 34136 states and 116669 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:16,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:16,781 INFO L93 Difference]: Finished difference Result 34892 states and 118662 transitions. [2021-06-05 14:11:16,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:11:16,782 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:16,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:16,864 INFO L225 Difference]: With dead ends: 34892 [2021-06-05 14:11:16,864 INFO L226 Difference]: Without dead ends: 34892 [2021-06-05 14:11:16,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:11:16,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34892 states. [2021-06-05 14:11:17,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34892 to 34647. [2021-06-05 14:11:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34647 states, 34646 states have (on average 3.412861513594643) internal successors, (118242), 34646 states have internal predecessors, (118242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:17,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34647 states to 34647 states and 118242 transitions. [2021-06-05 14:11:17,875 INFO L78 Accepts]: Start accepts. Automaton has 34647 states and 118242 transitions. Word has length 22 [2021-06-05 14:11:17,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:17,875 INFO L482 AbstractCegarLoop]: Abstraction has 34647 states and 118242 transitions. [2021-06-05 14:11:17,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:17,875 INFO L276 IsEmpty]: Start isEmpty. Operand 34647 states and 118242 transitions. [2021-06-05 14:11:17,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:17,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:17,885 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:18,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21613,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:18,086 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:18,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:18,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1079562019, now seen corresponding path program 248 times [2021-06-05 14:11:18,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:18,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167833532] [2021-06-05 14:11:18,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:18,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:18,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167833532] [2021-06-05 14:11:18,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167833532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:18,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739517491] [2021-06-05 14:11:18,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:11:18,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:11:18,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:18,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:18,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:18,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739517491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:18,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:18,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:18,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310307892] [2021-06-05 14:11:18,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:18,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:18,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:18,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:18,229 INFO L87 Difference]: Start difference. First operand 34647 states and 118242 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:18,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:18,493 INFO L93 Difference]: Finished difference Result 35167 states and 119631 transitions. [2021-06-05 14:11:18,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:11:18,493 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:18,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:18,574 INFO L225 Difference]: With dead ends: 35167 [2021-06-05 14:11:18,574 INFO L226 Difference]: Without dead ends: 35160 [2021-06-05 14:11:18,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:11:18,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35160 states. [2021-06-05 14:11:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35160 to 34647. [2021-06-05 14:11:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34647 states, 34646 states have (on average 3.4128326502337933) internal successors, (118241), 34646 states have internal predecessors, (118241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:19,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34647 states to 34647 states and 118241 transitions. [2021-06-05 14:11:19,563 INFO L78 Accepts]: Start accepts. Automaton has 34647 states and 118241 transitions. Word has length 22 [2021-06-05 14:11:19,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:19,563 INFO L482 AbstractCegarLoop]: Abstraction has 34647 states and 118241 transitions. [2021-06-05 14:11:19,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:19,563 INFO L276 IsEmpty]: Start isEmpty. Operand 34647 states and 118241 transitions. [2021-06-05 14:11:19,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:19,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:19,573 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:19,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21614,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:19,773 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:19,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:19,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1338049974, now seen corresponding path program 249 times [2021-06-05 14:11:19,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:19,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503584545] [2021-06-05 14:11:19,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:19,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:19,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503584545] [2021-06-05 14:11:19,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503584545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:19,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82048942] [2021-06-05 14:11:19,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:11:19,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:11:19,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:19,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:19,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:19,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82048942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:19,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:19,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:19,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294796769] [2021-06-05 14:11:19,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:19,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:19,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:19,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:19,970 INFO L87 Difference]: Start difference. First operand 34647 states and 118241 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:20,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:20,296 INFO L93 Difference]: Finished difference Result 35095 states and 119279 transitions. [2021-06-05 14:11:20,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:11:20,296 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:20,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:20,367 INFO L225 Difference]: With dead ends: 35095 [2021-06-05 14:11:20,367 INFO L226 Difference]: Without dead ends: 35095 [2021-06-05 14:11:20,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:11:20,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35095 states. [2021-06-05 14:11:20,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35095 to 34867. [2021-06-05 14:11:20,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34867 states, 34866 states have (on average 3.410342453966615) internal successors, (118905), 34866 states have internal predecessors, (118905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:21,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34867 states to 34867 states and 118905 transitions. [2021-06-05 14:11:21,347 INFO L78 Accepts]: Start accepts. Automaton has 34867 states and 118905 transitions. Word has length 22 [2021-06-05 14:11:21,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:21,347 INFO L482 AbstractCegarLoop]: Abstraction has 34867 states and 118905 transitions. [2021-06-05 14:11:21,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:21,347 INFO L276 IsEmpty]: Start isEmpty. Operand 34867 states and 118905 transitions. [2021-06-05 14:11:21,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:21,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:21,361 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:21,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21615,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:21,573 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:21,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:21,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1503873255, now seen corresponding path program 250 times [2021-06-05 14:11:21,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:21,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081003046] [2021-06-05 14:11:21,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:21,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:21,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081003046] [2021-06-05 14:11:21,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081003046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:21,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84656269] [2021-06-05 14:11:21,660 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 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 14:11:21,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:21,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:21,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:21,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:21,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84656269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:21,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:21,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:21,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987564616] [2021-06-05 14:11:21,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:21,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:21,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:21,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:21,751 INFO L87 Difference]: Start difference. First operand 34867 states and 118905 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:22,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:22,031 INFO L93 Difference]: Finished difference Result 35358 states and 120222 transitions. [2021-06-05 14:11:22,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:11:22,031 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:22,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:22,115 INFO L225 Difference]: With dead ends: 35358 [2021-06-05 14:11:22,115 INFO L226 Difference]: Without dead ends: 35350 [2021-06-05 14:11:22,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 152.8ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:11:22,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35350 states. [2021-06-05 14:11:22,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35350 to 34867. [2021-06-05 14:11:22,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34867 states, 34866 states have (on average 3.41031377272988) internal successors, (118904), 34866 states have internal predecessors, (118904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:22,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34867 states to 34867 states and 118904 transitions. [2021-06-05 14:11:22,768 INFO L78 Accepts]: Start accepts. Automaton has 34867 states and 118904 transitions. Word has length 22 [2021-06-05 14:11:22,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:22,768 INFO L482 AbstractCegarLoop]: Abstraction has 34867 states and 118904 transitions. [2021-06-05 14:11:22,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 34867 states and 118904 transitions. [2021-06-05 14:11:22,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:22,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:22,777 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:22,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21616,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:22,977 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:22,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:22,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1974516828, now seen corresponding path program 251 times [2021-06-05 14:11:22,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:22,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895672664] [2021-06-05 14:11:22,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:23,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:23,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895672664] [2021-06-05 14:11:23,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895672664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:23,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638498145] [2021-06-05 14:11:23,058 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:23,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:11:23,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:23,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:23,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:23,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638498145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:23,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:23,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:23,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645264704] [2021-06-05 14:11:23,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:23,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:23,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:23,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:23,439 INFO L87 Difference]: Start difference. First operand 34867 states and 118904 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:23,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:23,873 INFO L93 Difference]: Finished difference Result 35266 states and 119729 transitions. [2021-06-05 14:11:23,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:11:23,874 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:23,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:23,950 INFO L225 Difference]: With dead ends: 35266 [2021-06-05 14:11:23,950 INFO L226 Difference]: Without dead ends: 35266 [2021-06-05 14:11:23,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 594.0ms TimeCoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:11:23,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35266 states. [2021-06-05 14:11:24,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35266 to 34965. [2021-06-05 14:11:24,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34965 states, 34964 states have (on average 3.409163711245853) internal successors, (119198), 34964 states have internal predecessors, (119198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:24,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34965 states to 34965 states and 119198 transitions. [2021-06-05 14:11:24,622 INFO L78 Accepts]: Start accepts. Automaton has 34965 states and 119198 transitions. Word has length 22 [2021-06-05 14:11:24,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:24,622 INFO L482 AbstractCegarLoop]: Abstraction has 34965 states and 119198 transitions. [2021-06-05 14:11:24,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:24,625 INFO L276 IsEmpty]: Start isEmpty. Operand 34965 states and 119198 transitions. [2021-06-05 14:11:24,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:24,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:24,635 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:24,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21617 [2021-06-05 14:11:24,852 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:24,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:24,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1772619683, now seen corresponding path program 252 times [2021-06-05 14:11:24,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:24,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702032046] [2021-06-05 14:11:24,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:24,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:24,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702032046] [2021-06-05 14:11:24,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702032046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:24,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662463751] [2021-06-05 14:11:24,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:25,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:11:25,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:25,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:25,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:25,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662463751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:25,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:25,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:25,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909662814] [2021-06-05 14:11:25,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:25,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:25,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:25,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:25,236 INFO L87 Difference]: Start difference. First operand 34965 states and 119198 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:25,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:25,513 INFO L93 Difference]: Finished difference Result 35421 states and 120437 transitions. [2021-06-05 14:11:25,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:11:25,514 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:25,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:25,591 INFO L225 Difference]: With dead ends: 35421 [2021-06-05 14:11:25,591 INFO L226 Difference]: Without dead ends: 35412 [2021-06-05 14:11:25,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 150.5ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:11:25,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35412 states. [2021-06-05 14:11:26,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35412 to 34965. [2021-06-05 14:11:26,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34965 states, 34964 states have (on average 3.409135110399268) internal successors, (119197), 34964 states have internal predecessors, (119197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:26,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34965 states to 34965 states and 119197 transitions. [2021-06-05 14:11:26,224 INFO L78 Accepts]: Start accepts. Automaton has 34965 states and 119197 transitions. Word has length 22 [2021-06-05 14:11:26,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:26,224 INFO L482 AbstractCegarLoop]: Abstraction has 34965 states and 119197 transitions. [2021-06-05 14:11:26,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:26,224 INFO L276 IsEmpty]: Start isEmpty. Operand 34965 states and 119197 transitions. [2021-06-05 14:11:26,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:26,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:26,233 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:26,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21618,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:26,435 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:26,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:26,435 INFO L82 PathProgramCache]: Analyzing trace with hash -230152822, now seen corresponding path program 253 times [2021-06-05 14:11:26,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:26,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987997128] [2021-06-05 14:11:26,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:26,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:26,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987997128] [2021-06-05 14:11:26,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987997128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:26,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822474523] [2021-06-05 14:11:26,512 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:26,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:26,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:26,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822474523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:26,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:26,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:26,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032105967] [2021-06-05 14:11:26,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:26,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:26,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:26,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:26,590 INFO L87 Difference]: Start difference. First operand 34965 states and 119197 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:27,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:27,334 INFO L93 Difference]: Finished difference Result 35597 states and 120659 transitions. [2021-06-05 14:11:27,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 14:11:27,335 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:27,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:27,416 INFO L225 Difference]: With dead ends: 35597 [2021-06-05 14:11:27,416 INFO L226 Difference]: Without dead ends: 35597 [2021-06-05 14:11:27,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 559.8ms TimeCoverageRelationStatistics Valid=778, Invalid=1574, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 14:11:27,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35597 states. [2021-06-05 14:11:27,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35597 to 35052. [2021-06-05 14:11:27,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35052 states, 35051 states have (on average 3.4081195971584264) internal successors, (119458), 35051 states have internal predecessors, (119458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35052 states to 35052 states and 119458 transitions. [2021-06-05 14:11:28,062 INFO L78 Accepts]: Start accepts. Automaton has 35052 states and 119458 transitions. Word has length 22 [2021-06-05 14:11:28,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:28,062 INFO L482 AbstractCegarLoop]: Abstraction has 35052 states and 119458 transitions. [2021-06-05 14:11:28,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:28,062 INFO L276 IsEmpty]: Start isEmpty. Operand 35052 states and 119458 transitions. [2021-06-05 14:11:28,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:28,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:28,071 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:28,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21619,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:28,285 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:28,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:28,285 INFO L82 PathProgramCache]: Analyzing trace with hash -599127143, now seen corresponding path program 254 times [2021-06-05 14:11:28,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:28,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636220491] [2021-06-05 14:11:28,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:28,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:28,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636220491] [2021-06-05 14:11:28,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636220491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:28,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435752609] [2021-06-05 14:11:28,355 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:28,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:11:28,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:28,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:28,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 50 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:28,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435752609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:28,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:28,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:11:28,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014513824] [2021-06-05 14:11:28,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:28,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:28,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:28,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:28,436 INFO L87 Difference]: Start difference. First operand 35052 states and 119458 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:28,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:28,767 INFO L93 Difference]: Finished difference Result 35467 states and 120355 transitions. [2021-06-05 14:11:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:11:28,767 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:11:28,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:28,843 INFO L225 Difference]: With dead ends: 35467 [2021-06-05 14:11:28,843 INFO L226 Difference]: Without dead ends: 35467 [2021-06-05 14:11:28,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:11:28,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35467 states. [2021-06-05 14:11:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35467 to 35013. [2021-06-05 14:11:29,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35013 states, 35012 states have (on average 3.4085742031303554) internal successors, (119341), 35012 states have internal predecessors, (119341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:29,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35013 states to 35013 states and 119341 transitions. [2021-06-05 14:11:29,484 INFO L78 Accepts]: Start accepts. Automaton has 35013 states and 119341 transitions. Word has length 22 [2021-06-05 14:11:29,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:29,484 INFO L482 AbstractCegarLoop]: Abstraction has 35013 states and 119341 transitions. [2021-06-05 14:11:29,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:29,484 INFO L276 IsEmpty]: Start isEmpty. Operand 35013 states and 119341 transitions. [2021-06-05 14:11:29,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:29,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:29,493 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:29,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21620 [2021-06-05 14:11:29,694 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:29,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:29,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1376871388, now seen corresponding path program 255 times [2021-06-05 14:11:29,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:29,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140206549] [2021-06-05 14:11:29,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:29,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:29,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140206549] [2021-06-05 14:11:29,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140206549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:29,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738193736] [2021-06-05 14:11:29,762 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:29,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:11:29,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:29,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:29,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:29,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738193736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:29,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:29,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:11:29,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579972379] [2021-06-05 14:11:29,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:29,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:29,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:29,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:29,837 INFO L87 Difference]: Start difference. First operand 35013 states and 119341 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:30,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:30,249 INFO L93 Difference]: Finished difference Result 35354 states and 119908 transitions. [2021-06-05 14:11:30,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:11:30,249 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:11:30,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:30,324 INFO L225 Difference]: With dead ends: 35354 [2021-06-05 14:11:30,325 INFO L226 Difference]: Without dead ends: 35350 [2021-06-05 14:11:30,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:11:30,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35350 states. [2021-06-05 14:11:30,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35350 to 34236. [2021-06-05 14:11:30,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34236 states, 34235 states have (on average 3.406192493062655) internal successors, (116611), 34235 states have internal predecessors, (116611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:30,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34236 states to 34236 states and 116611 transitions. [2021-06-05 14:11:30,911 INFO L78 Accepts]: Start accepts. Automaton has 34236 states and 116611 transitions. Word has length 22 [2021-06-05 14:11:30,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:30,911 INFO L482 AbstractCegarLoop]: Abstraction has 34236 states and 116611 transitions. [2021-06-05 14:11:30,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:30,911 INFO L276 IsEmpty]: Start isEmpty. Operand 34236 states and 116611 transitions. [2021-06-05 14:11:30,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:30,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:30,920 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:31,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21621 [2021-06-05 14:11:31,122 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:31,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:31,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1955591385, now seen corresponding path program 256 times [2021-06-05 14:11:31,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:31,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083413582] [2021-06-05 14:11:31,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:31,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:31,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083413582] [2021-06-05 14:11:31,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083413582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:31,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890959037] [2021-06-05 14:11:31,196 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:31,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:31,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:31,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:31,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:31,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890959037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:31,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:31,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:11:31,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203353599] [2021-06-05 14:11:31,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:11:31,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:31,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:11:31,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:11:31,251 INFO L87 Difference]: Start difference. First operand 34236 states and 116611 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:31,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:31,635 INFO L93 Difference]: Finished difference Result 34750 states and 117977 transitions. [2021-06-05 14:11:31,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:11:31,636 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:31,700 INFO L225 Difference]: With dead ends: 34750 [2021-06-05 14:11:31,700 INFO L226 Difference]: Without dead ends: 34744 [2021-06-05 14:11:31,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:11:31,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34744 states. [2021-06-05 14:11:32,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34744 to 34236. [2021-06-05 14:11:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34236 states, 34235 states have (on average 3.406134073316781) internal successors, (116609), 34235 states have internal predecessors, (116609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:32,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34236 states to 34236 states and 116609 transitions. [2021-06-05 14:11:32,267 INFO L78 Accepts]: Start accepts. Automaton has 34236 states and 116609 transitions. Word has length 22 [2021-06-05 14:11:32,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:32,267 INFO L482 AbstractCegarLoop]: Abstraction has 34236 states and 116609 transitions. [2021-06-05 14:11:32,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:32,267 INFO L276 IsEmpty]: Start isEmpty. Operand 34236 states and 116609 transitions. [2021-06-05 14:11:32,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:32,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:32,276 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:32,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21622 [2021-06-05 14:11:32,476 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:32,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:32,477 INFO L82 PathProgramCache]: Analyzing trace with hash 2119589156, now seen corresponding path program 257 times [2021-06-05 14:11:32,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:32,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733343610] [2021-06-05 14:11:32,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:32,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:32,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733343610] [2021-06-05 14:11:32,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733343610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:32,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195859574] [2021-06-05 14:11:32,553 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:32,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:11:32,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:32,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:32,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:32,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195859574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:32,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:32,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:11:32,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956967490] [2021-06-05 14:11:32,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:11:32,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:32,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:11:32,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:11:32,613 INFO L87 Difference]: Start difference. First operand 34236 states and 116609 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:33,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:33,140 INFO L93 Difference]: Finished difference Result 42443 states and 142235 transitions. [2021-06-05 14:11:33,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:11:33,140 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:33,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:33,222 INFO L225 Difference]: With dead ends: 42443 [2021-06-05 14:11:33,222 INFO L226 Difference]: Without dead ends: 42443 [2021-06-05 14:11:33,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 238.8ms TimeCoverageRelationStatistics Valid=452, Invalid=880, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:11:33,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42443 states. [2021-06-05 14:11:33,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42443 to 40328. [2021-06-05 14:11:33,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40328 states, 40327 states have (on average 3.386341656954398) internal successors, (136561), 40327 states have internal predecessors, (136561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40328 states to 40328 states and 136561 transitions. [2021-06-05 14:11:33,910 INFO L78 Accepts]: Start accepts. Automaton has 40328 states and 136561 transitions. Word has length 22 [2021-06-05 14:11:33,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:33,910 INFO L482 AbstractCegarLoop]: Abstraction has 40328 states and 136561 transitions. [2021-06-05 14:11:33,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:33,910 INFO L276 IsEmpty]: Start isEmpty. Operand 40328 states and 136561 transitions. [2021-06-05 14:11:33,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:33,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:33,920 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:34,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21623 [2021-06-05 14:11:34,133 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:34,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:34,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1319124531, now seen corresponding path program 258 times [2021-06-05 14:11:34,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:34,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67057112] [2021-06-05 14:11:34,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:34,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:34,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67057112] [2021-06-05 14:11:34,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67057112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:34,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969996518] [2021-06-05 14:11:34,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:34,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:11:34,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:34,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:34,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:34,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969996518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:34,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:34,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:34,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102014320] [2021-06-05 14:11:34,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:34,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:34,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:34,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:34,265 INFO L87 Difference]: Start difference. First operand 40328 states and 136561 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:34,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:34,784 INFO L93 Difference]: Finished difference Result 40963 states and 138166 transitions. [2021-06-05 14:11:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:11:34,785 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:34,874 INFO L225 Difference]: With dead ends: 40963 [2021-06-05 14:11:34,875 INFO L226 Difference]: Without dead ends: 40957 [2021-06-05 14:11:34,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:11:34,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40957 states. [2021-06-05 14:11:35,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40957 to 40328. [2021-06-05 14:11:35,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40328 states, 40327 states have (on average 3.386292062389962) internal successors, (136559), 40327 states have internal predecessors, (136559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:35,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40328 states to 40328 states and 136559 transitions. [2021-06-05 14:11:35,640 INFO L78 Accepts]: Start accepts. Automaton has 40328 states and 136559 transitions. Word has length 22 [2021-06-05 14:11:35,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:35,640 INFO L482 AbstractCegarLoop]: Abstraction has 40328 states and 136559 transitions. [2021-06-05 14:11:35,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:35,640 INFO L276 IsEmpty]: Start isEmpty. Operand 40328 states and 136559 transitions. [2021-06-05 14:11:35,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:35,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:35,651 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:35,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21624,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:35,851 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:35,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:35,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1483122302, now seen corresponding path program 259 times [2021-06-05 14:11:35,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:35,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968378294] [2021-06-05 14:11:35,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:35,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:35,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968378294] [2021-06-05 14:11:35,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968378294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:35,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804030190] [2021-06-05 14:11:35,915 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:35,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:35,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:35,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804030190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:35,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:35,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:35,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953287099] [2021-06-05 14:11:35,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:35,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:35,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:35,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:35,982 INFO L87 Difference]: Start difference. First operand 40328 states and 136559 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:36,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:36,519 INFO L93 Difference]: Finished difference Result 47750 states and 159770 transitions. [2021-06-05 14:11:36,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:11:36,519 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:36,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:36,624 INFO L225 Difference]: With dead ends: 47750 [2021-06-05 14:11:36,624 INFO L226 Difference]: Without dead ends: 47750 [2021-06-05 14:11:36,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 342.1ms TimeCoverageRelationStatistics Valid=461, Invalid=871, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:11:36,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47750 states. [2021-06-05 14:11:37,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47750 to 35545. [2021-06-05 14:11:37,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35545 states, 35544 states have (on average 3.380429889714157) internal successors, (120154), 35544 states have internal predecessors, (120154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:37,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35545 states to 35545 states and 120154 transitions. [2021-06-05 14:11:37,634 INFO L78 Accepts]: Start accepts. Automaton has 35545 states and 120154 transitions. Word has length 22 [2021-06-05 14:11:37,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:37,634 INFO L482 AbstractCegarLoop]: Abstraction has 35545 states and 120154 transitions. [2021-06-05 14:11:37,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:37,634 INFO L276 IsEmpty]: Start isEmpty. Operand 35545 states and 120154 transitions. [2021-06-05 14:11:37,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:37,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:37,645 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:37,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21625,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:37,865 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:37,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:37,865 INFO L82 PathProgramCache]: Analyzing trace with hash 474153079, now seen corresponding path program 260 times [2021-06-05 14:11:37,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:37,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388408120] [2021-06-05 14:11:37,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:37,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:37,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388408120] [2021-06-05 14:11:37,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388408120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:37,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942400943] [2021-06-05 14:11:37,941 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:37,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:11:37,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:37,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:37,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:38,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942400943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:38,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:38,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:38,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119742274] [2021-06-05 14:11:38,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:38,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:38,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:38,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:38,005 INFO L87 Difference]: Start difference. First operand 35545 states and 120154 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:38,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:38,352 INFO L93 Difference]: Finished difference Result 36460 states and 122661 transitions. [2021-06-05 14:11:38,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:11:38,352 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:38,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:38,425 INFO L225 Difference]: With dead ends: 36460 [2021-06-05 14:11:38,426 INFO L226 Difference]: Without dead ends: 36453 [2021-06-05 14:11:38,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 188.4ms TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:11:38,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36453 states. [2021-06-05 14:11:38,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36453 to 35618. [2021-06-05 14:11:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35618 states, 35617 states have (on average 3.3797624729763878) internal successors, (120377), 35617 states have internal predecessors, (120377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:39,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35618 states to 35618 states and 120377 transitions. [2021-06-05 14:11:39,362 INFO L78 Accepts]: Start accepts. Automaton has 35618 states and 120377 transitions. Word has length 22 [2021-06-05 14:11:39,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:39,362 INFO L482 AbstractCegarLoop]: Abstraction has 35618 states and 120377 transitions. [2021-06-05 14:11:39,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:39,362 INFO L276 IsEmpty]: Start isEmpty. Operand 35618 states and 120377 transitions. [2021-06-05 14:11:39,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:39,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:39,373 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:39,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21626,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:39,577 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:39,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:39,577 INFO L82 PathProgramCache]: Analyzing trace with hash 215665124, now seen corresponding path program 261 times [2021-06-05 14:11:39,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:39,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121036002] [2021-06-05 14:11:39,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:39,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:39,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121036002] [2021-06-05 14:11:39,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121036002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:39,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696466461] [2021-06-05 14:11:39,656 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:39,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:11:39,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:39,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:39,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:39,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696466461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:39,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:39,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:39,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112156469] [2021-06-05 14:11:39,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:39,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:39,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:39,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:39,744 INFO L87 Difference]: Start difference. First operand 35618 states and 120377 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:40,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:40,250 INFO L93 Difference]: Finished difference Result 40432 states and 135039 transitions. [2021-06-05 14:11:40,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 14:11:40,250 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:40,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:40,338 INFO L225 Difference]: With dead ends: 40432 [2021-06-05 14:11:40,338 INFO L226 Difference]: Without dead ends: 40432 [2021-06-05 14:11:40,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 306.5ms TimeCoverageRelationStatistics Valid=641, Invalid=1251, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:11:40,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40432 states. [2021-06-05 14:11:40,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40432 to 35682. [2021-06-05 14:11:40,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35682 states, 35681 states have (on average 3.3822202292536643) internal successors, (120681), 35681 states have internal predecessors, (120681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:41,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35682 states to 35682 states and 120681 transitions. [2021-06-05 14:11:41,340 INFO L78 Accepts]: Start accepts. Automaton has 35682 states and 120681 transitions. Word has length 22 [2021-06-05 14:11:41,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:41,340 INFO L482 AbstractCegarLoop]: Abstraction has 35682 states and 120681 transitions. [2021-06-05 14:11:41,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:41,341 INFO L276 IsEmpty]: Start isEmpty. Operand 35682 states and 120681 transitions. [2021-06-05 14:11:41,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:41,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:41,351 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:41,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21627,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:41,567 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:41,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:41,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1231478759, now seen corresponding path program 262 times [2021-06-05 14:11:41,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:41,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062016083] [2021-06-05 14:11:41,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:41,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:41,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062016083] [2021-06-05 14:11:41,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062016083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:41,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872687104] [2021-06-05 14:11:41,653 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:41,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:41,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:41,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:41,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:41,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872687104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:41,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:41,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:41,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793554641] [2021-06-05 14:11:41,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:41,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:41,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:41,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:41,721 INFO L87 Difference]: Start difference. First operand 35682 states and 120681 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:42,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:42,022 INFO L93 Difference]: Finished difference Result 36907 states and 124167 transitions. [2021-06-05 14:11:42,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:11:42,022 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:42,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:42,106 INFO L225 Difference]: With dead ends: 36907 [2021-06-05 14:11:42,106 INFO L226 Difference]: Without dead ends: 36901 [2021-06-05 14:11:42,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:11:42,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36901 states. [2021-06-05 14:11:42,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36901 to 35689. [2021-06-05 14:11:42,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35689 states, 35688 states have (on average 3.3821452589105583) internal successors, (120702), 35688 states have internal predecessors, (120702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:43,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35689 states to 35689 states and 120702 transitions. [2021-06-05 14:11:43,078 INFO L78 Accepts]: Start accepts. Automaton has 35689 states and 120702 transitions. Word has length 22 [2021-06-05 14:11:43,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:43,078 INFO L482 AbstractCegarLoop]: Abstraction has 35689 states and 120702 transitions. [2021-06-05 14:11:43,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:43,078 INFO L276 IsEmpty]: Start isEmpty. Operand 35689 states and 120702 transitions. [2021-06-05 14:11:43,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:43,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:43,088 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:43,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21628 [2021-06-05 14:11:43,289 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:43,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:43,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1067480988, now seen corresponding path program 263 times [2021-06-05 14:11:43,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:43,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138508057] [2021-06-05 14:11:43,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:43,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:43,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138508057] [2021-06-05 14:11:43,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138508057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:43,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835264905] [2021-06-05 14:11:43,352 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:43,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:11:43,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:43,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:43,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:43,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835264905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:43,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:43,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:43,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943794093] [2021-06-05 14:11:43,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:43,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:43,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:43,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:43,427 INFO L87 Difference]: Start difference. First operand 35689 states and 120702 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:43,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:43,801 INFO L93 Difference]: Finished difference Result 37769 states and 126742 transitions. [2021-06-05 14:11:43,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:11:43,801 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:43,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:43,881 INFO L225 Difference]: With dead ends: 37769 [2021-06-05 14:11:43,881 INFO L226 Difference]: Without dead ends: 37769 [2021-06-05 14:11:43,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=414, Invalid=776, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:11:43,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37769 states. [2021-06-05 14:11:44,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37769 to 35344. [2021-06-05 14:11:44,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35344 states, 35343 states have (on average 3.387177093059446) internal successors, (119713), 35343 states have internal predecessors, (119713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:44,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35344 states to 35344 states and 119713 transitions. [2021-06-05 14:11:44,842 INFO L78 Accepts]: Start accepts. Automaton has 35344 states and 119713 transitions. Word has length 22 [2021-06-05 14:11:44,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:44,842 INFO L482 AbstractCegarLoop]: Abstraction has 35344 states and 119713 transitions. [2021-06-05 14:11:44,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:44,842 INFO L276 IsEmpty]: Start isEmpty. Operand 35344 states and 119713 transitions. [2021-06-05 14:11:44,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:44,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:44,852 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:45,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21629,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:45,053 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:45,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:45,053 INFO L82 PathProgramCache]: Analyzing trace with hash -2076450211, now seen corresponding path program 264 times [2021-06-05 14:11:45,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:45,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401019538] [2021-06-05 14:11:45,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:45,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:45,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401019538] [2021-06-05 14:11:45,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401019538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:45,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093700794] [2021-06-05 14:11:45,120 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:45,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:11:45,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:45,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:45,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:45,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093700794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:45,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:45,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:45,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673188607] [2021-06-05 14:11:45,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:45,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:45,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:45,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:45,205 INFO L87 Difference]: Start difference. First operand 35344 states and 119713 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:45,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:45,490 INFO L93 Difference]: Finished difference Result 35796 states and 120895 transitions. [2021-06-05 14:11:45,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:11:45,491 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:45,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:45,574 INFO L225 Difference]: With dead ends: 35796 [2021-06-05 14:11:45,575 INFO L226 Difference]: Without dead ends: 35789 [2021-06-05 14:11:45,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 143.9ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:11:45,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35789 states. [2021-06-05 14:11:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35789 to 35344. [2021-06-05 14:11:46,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35344 states, 35343 states have (on average 3.387148798913505) internal successors, (119712), 35343 states have internal predecessors, (119712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35344 states to 35344 states and 119712 transitions. [2021-06-05 14:11:46,236 INFO L78 Accepts]: Start accepts. Automaton has 35344 states and 119712 transitions. Word has length 22 [2021-06-05 14:11:46,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:46,236 INFO L482 AbstractCegarLoop]: Abstraction has 35344 states and 119712 transitions. [2021-06-05 14:11:46,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:46,236 INFO L276 IsEmpty]: Start isEmpty. Operand 35344 states and 119712 transitions. [2021-06-05 14:11:46,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:46,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:46,247 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:46,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21630 [2021-06-05 14:11:46,461 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:46,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:46,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1960029130, now seen corresponding path program 265 times [2021-06-05 14:11:46,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:46,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207740064] [2021-06-05 14:11:46,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:46,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:46,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207740064] [2021-06-05 14:11:46,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207740064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:46,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306779381] [2021-06-05 14:11:46,805 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:46,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:46,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:46,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306779381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:46,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:46,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:46,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336434613] [2021-06-05 14:11:46,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:46,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:46,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:46,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:46,897 INFO L87 Difference]: Start difference. First operand 35344 states and 119712 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:47,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:47,349 INFO L93 Difference]: Finished difference Result 36722 states and 123439 transitions. [2021-06-05 14:11:47,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:11:47,350 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:47,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:47,436 INFO L225 Difference]: With dead ends: 36722 [2021-06-05 14:11:47,436 INFO L226 Difference]: Without dead ends: 36722 [2021-06-05 14:11:47,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 550.6ms TimeCoverageRelationStatistics Valid=517, Invalid=1043, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:11:47,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36722 states. [2021-06-05 14:11:47,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36722 to 35442. [2021-06-05 14:11:48,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35442 states, 35441 states have (on average 3.387799441325019) internal successors, (120067), 35441 states have internal predecessors, (120067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35442 states to 35442 states and 120067 transitions. [2021-06-05 14:11:48,127 INFO L78 Accepts]: Start accepts. Automaton has 35442 states and 120067 transitions. Word has length 22 [2021-06-05 14:11:48,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:48,127 INFO L482 AbstractCegarLoop]: Abstraction has 35442 states and 120067 transitions. [2021-06-05 14:11:48,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 35442 states and 120067 transitions. [2021-06-05 14:11:48,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:48,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:48,138 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:48,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21631 [2021-06-05 14:11:48,357 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:48,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:48,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1794205849, now seen corresponding path program 266 times [2021-06-05 14:11:48,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:48,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267107643] [2021-06-05 14:11:48,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:48,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:48,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267107643] [2021-06-05 14:11:48,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267107643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:48,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933133822] [2021-06-05 14:11:48,647 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:48,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:11:48,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:48,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:48,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:48,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933133822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:48,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:48,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:48,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779596943] [2021-06-05 14:11:48,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:48,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:48,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:48,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:48,713 INFO L87 Difference]: Start difference. First operand 35442 states and 120067 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:49,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:49,027 INFO L93 Difference]: Finished difference Result 35860 states and 121183 transitions. [2021-06-05 14:11:49,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:11:49,027 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:49,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:49,114 INFO L225 Difference]: With dead ends: 35860 [2021-06-05 14:11:49,114 INFO L226 Difference]: Without dead ends: 35852 [2021-06-05 14:11:49,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 393.6ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:11:49,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35852 states. [2021-06-05 14:11:49,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35852 to 35442. [2021-06-05 14:11:49,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35442 states, 35441 states have (on average 3.38777122541689) internal successors, (120066), 35441 states have internal predecessors, (120066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:49,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35442 states to 35442 states and 120066 transitions. [2021-06-05 14:11:49,817 INFO L78 Accepts]: Start accepts. Automaton has 35442 states and 120066 transitions. Word has length 22 [2021-06-05 14:11:49,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:49,817 INFO L482 AbstractCegarLoop]: Abstraction has 35442 states and 120066 transitions. [2021-06-05 14:11:49,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:49,817 INFO L276 IsEmpty]: Start isEmpty. Operand 35442 states and 120066 transitions. [2021-06-05 14:11:49,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:49,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:49,828 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:50,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21632 [2021-06-05 14:11:50,041 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:50,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:50,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1323562276, now seen corresponding path program 267 times [2021-06-05 14:11:50,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:50,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906068180] [2021-06-05 14:11:50,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:50,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:50,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906068180] [2021-06-05 14:11:50,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906068180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:50,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066820205] [2021-06-05 14:11:50,109 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:50,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:11:50,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:50,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:50,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:50,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066820205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:50,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:50,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:50,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444656740] [2021-06-05 14:11:50,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:50,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:50,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:50,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:50,179 INFO L87 Difference]: Start difference. First operand 35442 states and 120066 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:50,406 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 14:11:50,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:50,843 INFO L93 Difference]: Finished difference Result 36817 states and 123640 transitions. [2021-06-05 14:11:50,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 14:11:50,843 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:50,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:50,927 INFO L225 Difference]: With dead ends: 36817 [2021-06-05 14:11:50,927 INFO L226 Difference]: Without dead ends: 36817 [2021-06-05 14:11:50,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 490.1ms TimeCoverageRelationStatistics Valid=752, Invalid=1504, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 14:11:50,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36817 states. [2021-06-05 14:11:51,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36817 to 35424. [2021-06-05 14:11:51,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35424 states, 35423 states have (on average 3.3881376506789374) internal successors, (120018), 35423 states have internal predecessors, (120018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:51,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35424 states to 35424 states and 120018 transitions. [2021-06-05 14:11:51,569 INFO L78 Accepts]: Start accepts. Automaton has 35424 states and 120018 transitions. Word has length 22 [2021-06-05 14:11:51,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:51,569 INFO L482 AbstractCegarLoop]: Abstraction has 35424 states and 120018 transitions. [2021-06-05 14:11:51,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:51,570 INFO L276 IsEmpty]: Start isEmpty. Operand 35424 states and 120018 transitions. [2021-06-05 14:11:51,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:51,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:51,579 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:51,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21633 [2021-06-05 14:11:51,793 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:51,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:51,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1304197875, now seen corresponding path program 268 times [2021-06-05 14:11:51,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:51,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129398158] [2021-06-05 14:11:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:51,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:51,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129398158] [2021-06-05 14:11:51,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129398158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:51,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883236325] [2021-06-05 14:11:51,871 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:51,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:51,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:51,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:51,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:51,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883236325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:51,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:51,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:51,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749378033] [2021-06-05 14:11:51,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:51,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:51,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:51,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:51,942 INFO L87 Difference]: Start difference. First operand 35424 states and 120018 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:52,129 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 14:11:52,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:52,433 INFO L93 Difference]: Finished difference Result 37279 states and 125493 transitions. [2021-06-05 14:11:52,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:11:52,434 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:52,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:52,511 INFO L225 Difference]: With dead ends: 37279 [2021-06-05 14:11:52,511 INFO L226 Difference]: Without dead ends: 37273 [2021-06-05 14:11:52,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 298.2ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:11:52,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37273 states. [2021-06-05 14:11:53,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37273 to 35486. [2021-06-05 14:11:53,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35486 states, 35485 states have (on average 3.3883049175708044) internal successors, (120234), 35485 states have internal predecessors, (120234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:53,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35486 states to 35486 states and 120234 transitions. [2021-06-05 14:11:53,174 INFO L78 Accepts]: Start accepts. Automaton has 35486 states and 120234 transitions. Word has length 22 [2021-06-05 14:11:53,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:53,175 INFO L482 AbstractCegarLoop]: Abstraction has 35486 states and 120234 transitions. [2021-06-05 14:11:53,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:53,175 INFO L276 IsEmpty]: Start isEmpty. Operand 35486 states and 120234 transitions. [2021-06-05 14:11:53,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:53,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:53,185 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:53,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21634,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:53,397 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:53,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:53,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1468195646, now seen corresponding path program 269 times [2021-06-05 14:11:53,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:53,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448111091] [2021-06-05 14:11:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:53,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:53,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448111091] [2021-06-05 14:11:53,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448111091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:53,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59073921] [2021-06-05 14:11:53,459 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:53,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:11:53,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:53,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:53,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:53,535 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:53,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59073921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:53,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:53,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:53,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633487433] [2021-06-05 14:11:53,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:53,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:53,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:53,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:53,535 INFO L87 Difference]: Start difference. First operand 35486 states and 120234 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:53,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:53,908 INFO L93 Difference]: Finished difference Result 36239 states and 122100 transitions. [2021-06-05 14:11:53,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:11:53,909 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:53,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:53,985 INFO L225 Difference]: With dead ends: 36239 [2021-06-05 14:11:53,985 INFO L226 Difference]: Without dead ends: 36239 [2021-06-05 14:11:53,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 252.6ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:11:54,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36239 states. [2021-06-05 14:11:54,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36239 to 35451. [2021-06-05 14:11:54,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35451 states, 35450 states have (on average 3.389026798307475) internal successors, (120141), 35450 states have internal predecessors, (120141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:54,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35451 states to 35451 states and 120141 transitions. [2021-06-05 14:11:54,607 INFO L78 Accepts]: Start accepts. Automaton has 35451 states and 120141 transitions. Word has length 22 [2021-06-05 14:11:54,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:54,607 INFO L482 AbstractCegarLoop]: Abstraction has 35451 states and 120141 transitions. [2021-06-05 14:11:54,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:54,607 INFO L276 IsEmpty]: Start isEmpty. Operand 35451 states and 120141 transitions. [2021-06-05 14:11:54,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:54,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:54,617 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:54,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21635,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:54,818 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:54,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:54,818 INFO L82 PathProgramCache]: Analyzing trace with hash 459226423, now seen corresponding path program 270 times [2021-06-05 14:11:54,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:54,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090451876] [2021-06-05 14:11:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:54,888 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:54,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:54,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090451876] [2021-06-05 14:11:54,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090451876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:54,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373772617] [2021-06-05 14:11:54,888 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:54,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:11:54,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:54,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:54,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:54,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373772617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:54,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:54,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:54,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009155737] [2021-06-05 14:11:54,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:54,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:54,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:54,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:54,953 INFO L87 Difference]: Start difference. First operand 35451 states and 120141 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:55,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:55,309 INFO L93 Difference]: Finished difference Result 35974 states and 121515 transitions. [2021-06-05 14:11:55,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:11:55,310 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:55,370 INFO L225 Difference]: With dead ends: 35974 [2021-06-05 14:11:55,370 INFO L226 Difference]: Without dead ends: 35967 [2021-06-05 14:11:55,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:11:55,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35967 states. [2021-06-05 14:11:55,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35967 to 35451. [2021-06-05 14:11:55,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35451 states, 35450 states have (on average 3.3889985895627643) internal successors, (120140), 35450 states have internal predecessors, (120140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:55,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35451 states to 35451 states and 120140 transitions. [2021-06-05 14:11:55,934 INFO L78 Accepts]: Start accepts. Automaton has 35451 states and 120140 transitions. Word has length 22 [2021-06-05 14:11:55,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:55,934 INFO L482 AbstractCegarLoop]: Abstraction has 35451 states and 120140 transitions. [2021-06-05 14:11:55,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:55,934 INFO L276 IsEmpty]: Start isEmpty. Operand 35451 states and 120140 transitions. [2021-06-05 14:11:55,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:55,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:55,944 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:56,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21636,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:56,144 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:56,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:56,145 INFO L82 PathProgramCache]: Analyzing trace with hash 200738468, now seen corresponding path program 271 times [2021-06-05 14:11:56,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:56,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226107275] [2021-06-05 14:11:56,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:56,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:56,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226107275] [2021-06-05 14:11:56,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226107275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:56,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899966315] [2021-06-05 14:11:56,210 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:56,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:56,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:56,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899966315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:56,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:56,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:56,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463420062] [2021-06-05 14:11:56,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:56,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:56,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:56,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:56,277 INFO L87 Difference]: Start difference. First operand 35451 states and 120140 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:56,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:56,742 INFO L93 Difference]: Finished difference Result 35935 states and 121243 transitions. [2021-06-05 14:11:56,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:11:56,743 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:56,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:56,812 INFO L225 Difference]: With dead ends: 35935 [2021-06-05 14:11:56,812 INFO L226 Difference]: Without dead ends: 35935 [2021-06-05 14:11:56,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:11:56,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35935 states. [2021-06-05 14:11:57,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35935 to 35458. [2021-06-05 14:11:57,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35458 states, 35457 states have (on average 3.389062808472234) internal successors, (120166), 35457 states have internal predecessors, (120166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:57,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35458 states to 35458 states and 120166 transitions. [2021-06-05 14:11:57,385 INFO L78 Accepts]: Start accepts. Automaton has 35458 states and 120166 transitions. Word has length 22 [2021-06-05 14:11:57,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:57,386 INFO L482 AbstractCegarLoop]: Abstraction has 35458 states and 120166 transitions. [2021-06-05 14:11:57,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:57,386 INFO L276 IsEmpty]: Start isEmpty. Operand 35458 states and 120166 transitions. [2021-06-05 14:11:57,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:57,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:57,396 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:57,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21637,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:57,597 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:57,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:57,597 INFO L82 PathProgramCache]: Analyzing trace with hash 34915187, now seen corresponding path program 272 times [2021-06-05 14:11:57,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:57,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190976741] [2021-06-05 14:11:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:57,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:57,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190976741] [2021-06-05 14:11:57,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190976741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:57,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133254123] [2021-06-05 14:11:57,670 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:57,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:11:57,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:57,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:57,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:57,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133254123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:57,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:57,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:57,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726641388] [2021-06-05 14:11:57,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:57,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:57,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:57,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:57,733 INFO L87 Difference]: Start difference. First operand 35458 states and 120166 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:57,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:57,986 INFO L93 Difference]: Finished difference Result 35954 states and 121474 transitions. [2021-06-05 14:11:57,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:11:57,986 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:57,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:58,218 INFO L225 Difference]: With dead ends: 35954 [2021-06-05 14:11:58,219 INFO L226 Difference]: Without dead ends: 35946 [2021-06-05 14:11:58,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:11:58,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35946 states. [2021-06-05 14:11:58,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35946 to 35458. [2021-06-05 14:11:58,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35458 states, 35457 states have (on average 3.3890346052965565) internal successors, (120165), 35457 states have internal predecessors, (120165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35458 states to 35458 states and 120165 transitions. [2021-06-05 14:11:58,750 INFO L78 Accepts]: Start accepts. Automaton has 35458 states and 120165 transitions. Word has length 22 [2021-06-05 14:11:58,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:58,750 INFO L482 AbstractCegarLoop]: Abstraction has 35458 states and 120165 transitions. [2021-06-05 14:11:58,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:58,750 INFO L276 IsEmpty]: Start isEmpty. Operand 35458 states and 120165 transitions. [2021-06-05 14:11:58,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:58,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:58,760 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:58,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21638,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:58,960 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:58,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:58,960 INFO L82 PathProgramCache]: Analyzing trace with hash -435728386, now seen corresponding path program 273 times [2021-06-05 14:11:58,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:58,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765542810] [2021-06-05 14:11:58,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:59,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:59,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765542810] [2021-06-05 14:11:59,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765542810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:59,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722205926] [2021-06-05 14:11:59,032 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:59,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:11:59,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:59,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:11:59,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:59,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722205926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:59,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:59,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:11:59,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959726493] [2021-06-05 14:11:59,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:11:59,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:59,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:11:59,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:59,099 INFO L87 Difference]: Start difference. First operand 35458 states and 120165 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:59,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:59,504 INFO L93 Difference]: Finished difference Result 35839 states and 120966 transitions. [2021-06-05 14:11:59,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:11:59,505 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:11:59,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:59,580 INFO L225 Difference]: With dead ends: 35839 [2021-06-05 14:11:59,581 INFO L226 Difference]: Without dead ends: 35839 [2021-06-05 14:11:59,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 274.4ms TimeCoverageRelationStatistics Valid=592, Invalid=1214, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:11:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35839 states. [2021-06-05 14:12:00,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35839 to 35458. [2021-06-05 14:12:00,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35458 states, 35457 states have (on average 3.3890346052965565) internal successors, (120165), 35457 states have internal predecessors, (120165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:00,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35458 states to 35458 states and 120165 transitions. [2021-06-05 14:12:00,279 INFO L78 Accepts]: Start accepts. Automaton has 35458 states and 120165 transitions. Word has length 22 [2021-06-05 14:12:00,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:00,279 INFO L482 AbstractCegarLoop]: Abstraction has 35458 states and 120165 transitions. [2021-06-05 14:12:00,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:00,279 INFO L276 IsEmpty]: Start isEmpty. Operand 35458 states and 120165 transitions. [2021-06-05 14:12:00,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:00,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:00,289 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:00,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21639,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:00,489 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:00,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:00,489 INFO L82 PathProgramCache]: Analyzing trace with hash -233831241, now seen corresponding path program 274 times [2021-06-05 14:12:00,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:00,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79184720] [2021-06-05 14:12:00,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:00,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:00,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79184720] [2021-06-05 14:12:00,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79184720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:00,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384419356] [2021-06-05 14:12:00,565 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:00,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:12:00,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:00,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:12:00,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:00,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384419356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:00,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:00,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:12:00,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035411498] [2021-06-05 14:12:00,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:12:00,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:00,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:12:00,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:12:00,718 INFO L87 Difference]: Start difference. First operand 35458 states and 120165 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:00,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:00,995 INFO L93 Difference]: Finished difference Result 35916 states and 121397 transitions. [2021-06-05 14:12:00,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:12:00,996 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:12:00,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:01,077 INFO L225 Difference]: With dead ends: 35916 [2021-06-05 14:12:01,078 INFO L226 Difference]: Without dead ends: 35907 [2021-06-05 14:12:01,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:12:01,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35907 states. [2021-06-05 14:12:01,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35907 to 35458. [2021-06-05 14:12:01,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35458 states, 35457 states have (on average 3.389006402120879) internal successors, (120164), 35457 states have internal predecessors, (120164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35458 states to 35458 states and 120164 transitions. [2021-06-05 14:12:01,942 INFO L78 Accepts]: Start accepts. Automaton has 35458 states and 120164 transitions. Word has length 22 [2021-06-05 14:12:01,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:01,942 INFO L482 AbstractCegarLoop]: Abstraction has 35458 states and 120164 transitions. [2021-06-05 14:12:01,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:01,942 INFO L276 IsEmpty]: Start isEmpty. Operand 35458 states and 120164 transitions. [2021-06-05 14:12:01,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:01,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:01,952 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:02,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21640 [2021-06-05 14:12:02,169 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:02,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:02,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1308635620, now seen corresponding path program 275 times [2021-06-05 14:12:02,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:02,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938524435] [2021-06-05 14:12:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:02,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:02,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:02,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938524435] [2021-06-05 14:12:02,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938524435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:02,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821512647] [2021-06-05 14:12:02,242 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:02,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:12:02,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:02,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:12:02,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:02,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821512647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:02,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:02,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:12:02,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721495509] [2021-06-05 14:12:02,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:12:02,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:02,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:12:02,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:12:02,311 INFO L87 Difference]: Start difference. First operand 35458 states and 120164 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:02,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:02,932 INFO L93 Difference]: Finished difference Result 35992 states and 121396 transitions. [2021-06-05 14:12:02,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 14:12:02,932 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:12:02,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:03,015 INFO L225 Difference]: With dead ends: 35992 [2021-06-05 14:12:03,015 INFO L226 Difference]: Without dead ends: 35992 [2021-06-05 14:12:03,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 451.7ms TimeCoverageRelationStatistics Valid=777, Invalid=1575, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 14:12:03,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35992 states. [2021-06-05 14:12:03,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35992 to 35459. [2021-06-05 14:12:03,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35459 states, 35458 states have (on average 3.3889954312143944) internal successors, (120167), 35458 states have internal predecessors, (120167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:03,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35459 states to 35459 states and 120167 transitions. [2021-06-05 14:12:03,898 INFO L78 Accepts]: Start accepts. Automaton has 35459 states and 120167 transitions. Word has length 22 [2021-06-05 14:12:03,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:03,899 INFO L482 AbstractCegarLoop]: Abstraction has 35459 states and 120167 transitions. [2021-06-05 14:12:03,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:03,899 INFO L276 IsEmpty]: Start isEmpty. Operand 35459 states and 120167 transitions. [2021-06-05 14:12:03,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:03,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:03,909 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:04,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21641,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:04,125 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:04,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:04,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1917455481, now seen corresponding path program 276 times [2021-06-05 14:12:04,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:04,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077255980] [2021-06-05 14:12:04,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:04,186 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:04,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:04,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077255980] [2021-06-05 14:12:04,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077255980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:04,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006724511] [2021-06-05 14:12:04,186 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:04,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:12:04,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:04,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:12:04,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:12:04,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006724511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:04,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:04,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:12:04,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695083504] [2021-06-05 14:12:04,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:12:04,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:04,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:12:04,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:12:04,366 INFO L87 Difference]: Start difference. First operand 35459 states and 120167 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:04,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:04,570 INFO L93 Difference]: Finished difference Result 35845 states and 120782 transitions. [2021-06-05 14:12:04,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:12:04,571 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:12:04,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:04,648 INFO L225 Difference]: With dead ends: 35845 [2021-06-05 14:12:04,648 INFO L226 Difference]: Without dead ends: 35845 [2021-06-05 14:12:04,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:12:04,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35845 states. [2021-06-05 14:12:05,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35845 to 35470. [2021-06-05 14:12:05,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35470 states, 35469 states have (on average 3.389128534776847) internal successors, (120209), 35469 states have internal predecessors, (120209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:05,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35470 states to 35470 states and 120209 transitions. [2021-06-05 14:12:05,568 INFO L78 Accepts]: Start accepts. Automaton has 35470 states and 120209 transitions. Word has length 22 [2021-06-05 14:12:05,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:05,568 INFO L482 AbstractCegarLoop]: Abstraction has 35470 states and 120209 transitions. [2021-06-05 14:12:05,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:05,568 INFO L276 IsEmpty]: Start isEmpty. Operand 35470 states and 120209 transitions. [2021-06-05 14:12:05,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:05,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:05,578 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:05,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21642 [2021-06-05 14:12:05,793 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:05,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:05,793 INFO L82 PathProgramCache]: Analyzing trace with hash -834165348, now seen corresponding path program 277 times [2021-06-05 14:12:05,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:05,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497339410] [2021-06-05 14:12:05,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:05,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:05,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497339410] [2021-06-05 14:12:05,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497339410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:05,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383985539] [2021-06-05 14:12:05,850 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:05,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:12:05,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:12:05,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383985539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:05,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:05,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:12:05,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979643484] [2021-06-05 14:12:05,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:12:05,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:05,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:12:05,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:12:05,910 INFO L87 Difference]: Start difference. First operand 35470 states and 120209 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:06,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:06,193 INFO L93 Difference]: Finished difference Result 36773 states and 124101 transitions. [2021-06-05 14:12:06,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:12:06,193 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:12:06,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:06,272 INFO L225 Difference]: With dead ends: 36773 [2021-06-05 14:12:06,272 INFO L226 Difference]: Without dead ends: 36769 [2021-06-05 14:12:06,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:12:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36769 states. [2021-06-05 14:12:07,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36769 to 36539. [2021-06-05 14:12:07,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36539 states, 36538 states have (on average 3.388362800372215) internal successors, (123804), 36538 states have internal predecessors, (123804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:07,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36539 states to 36539 states and 123804 transitions. [2021-06-05 14:12:07,183 INFO L78 Accepts]: Start accepts. Automaton has 36539 states and 123804 transitions. Word has length 22 [2021-06-05 14:12:07,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:07,183 INFO L482 AbstractCegarLoop]: Abstraction has 36539 states and 123804 transitions. [2021-06-05 14:12:07,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:07,183 INFO L276 IsEmpty]: Start isEmpty. Operand 36539 states and 123804 transitions. [2021-06-05 14:12:07,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:07,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:07,193 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:07,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21643,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:07,413 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:07,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:07,413 INFO L82 PathProgramCache]: Analyzing trace with hash -177363171, now seen corresponding path program 278 times [2021-06-05 14:12:07,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:07,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592917073] [2021-06-05 14:12:07,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:07,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:07,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:07,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592917073] [2021-06-05 14:12:07,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592917073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:07,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472555814] [2021-06-05 14:12:07,473 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:07,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:12:07,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:07,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:12:07,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:07,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472555814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:07,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:07,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:12:07,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857788578] [2021-06-05 14:12:07,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:12:07,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:07,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:12:07,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:12:07,530 INFO L87 Difference]: Start difference. First operand 36539 states and 123804 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:07,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:07,820 INFO L93 Difference]: Finished difference Result 36910 states and 124367 transitions. [2021-06-05 14:12:07,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:12:07,821 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:12:07,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:07,896 INFO L225 Difference]: With dead ends: 36910 [2021-06-05 14:12:07,896 INFO L226 Difference]: Without dead ends: 36909 [2021-06-05 14:12:07,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:12:07,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36909 states. [2021-06-05 14:12:08,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36909 to 36539. [2021-06-05 14:12:08,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36539 states, 36538 states have (on average 3.3881164814713447) internal successors, (123795), 36538 states have internal predecessors, (123795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:08,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36539 states to 36539 states and 123795 transitions. [2021-06-05 14:12:08,881 INFO L78 Accepts]: Start accepts. Automaton has 36539 states and 123795 transitions. Word has length 22 [2021-06-05 14:12:08,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:08,881 INFO L482 AbstractCegarLoop]: Abstraction has 36539 states and 123795 transitions. [2021-06-05 14:12:08,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:08,881 INFO L276 IsEmpty]: Start isEmpty. Operand 36539 states and 123795 transitions. [2021-06-05 14:12:08,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:08,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:08,891 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:09,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21644 [2021-06-05 14:12:09,101 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:09,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:09,101 INFO L82 PathProgramCache]: Analyzing trace with hash 745055562, now seen corresponding path program 279 times [2021-06-05 14:12:09,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:09,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286872910] [2021-06-05 14:12:09,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:09,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:09,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:09,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286872910] [2021-06-05 14:12:09,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286872910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:09,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564028598] [2021-06-05 14:12:09,157 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:09,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:12:09,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:09,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:12:09,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:09,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564028598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:09,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:09,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:12:09,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495124926] [2021-06-05 14:12:09,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:12:09,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:09,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:12:09,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:12:09,221 INFO L87 Difference]: Start difference. First operand 36539 states and 123795 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:09,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:09,447 INFO L93 Difference]: Finished difference Result 37170 states and 125257 transitions. [2021-06-05 14:12:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:12:09,447 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:12:09,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:09,530 INFO L225 Difference]: With dead ends: 37170 [2021-06-05 14:12:09,530 INFO L226 Difference]: Without dead ends: 37170 [2021-06-05 14:12:09,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:12:09,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37170 states. [2021-06-05 14:12:10,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37170 to 36554. [2021-06-05 14:12:10,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36554 states, 36553 states have (on average 3.3879024977430032) internal successors, (123838), 36553 states have internal predecessors, (123838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:10,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36554 states to 36554 states and 123838 transitions. [2021-06-05 14:12:10,469 INFO L78 Accepts]: Start accepts. Automaton has 36554 states and 123838 transitions. Word has length 22 [2021-06-05 14:12:10,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:10,470 INFO L482 AbstractCegarLoop]: Abstraction has 36554 states and 123838 transitions. [2021-06-05 14:12:10,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:10,470 INFO L276 IsEmpty]: Start isEmpty. Operand 36554 states and 123838 transitions. [2021-06-05 14:12:10,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:10,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:10,480 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:10,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21645 [2021-06-05 14:12:10,689 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:10,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:10,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1533250137, now seen corresponding path program 280 times [2021-06-05 14:12:10,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:10,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65840819] [2021-06-05 14:12:10,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:10,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:10,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65840819] [2021-06-05 14:12:10,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65840819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:10,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250139533] [2021-06-05 14:12:10,755 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:10,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:12:10,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:10,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:12:10,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:10,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250139533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:10,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:10,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:12:10,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103748233] [2021-06-05 14:12:10,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:12:10,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:10,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:12:10,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:12:10,837 INFO L87 Difference]: Start difference. First operand 36554 states and 123838 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:11,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:11,136 INFO L93 Difference]: Finished difference Result 36930 states and 124408 transitions. [2021-06-05 14:12:11,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:12:11,137 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:12:11,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:11,211 INFO L225 Difference]: With dead ends: 36930 [2021-06-05 14:12:11,211 INFO L226 Difference]: Without dead ends: 36928 [2021-06-05 14:12:11,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:12:11,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36928 states. [2021-06-05 14:12:12,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36928 to 36554. [2021-06-05 14:12:12,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36554 states, 36553 states have (on average 3.387847782671737) internal successors, (123836), 36553 states have internal predecessors, (123836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:12,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36554 states to 36554 states and 123836 transitions. [2021-06-05 14:12:12,153 INFO L78 Accepts]: Start accepts. Automaton has 36554 states and 123836 transitions. Word has length 22 [2021-06-05 14:12:12,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:12,153 INFO L482 AbstractCegarLoop]: Abstraction has 36554 states and 123836 transitions. [2021-06-05 14:12:12,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:12,153 INFO L276 IsEmpty]: Start isEmpty. Operand 36554 states and 123836 transitions. [2021-06-05 14:12:12,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:12,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:12,163 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:12,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21646,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:12,380 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:12,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:12,380 INFO L82 PathProgramCache]: Analyzing trace with hash -983991772, now seen corresponding path program 281 times [2021-06-05 14:12:12,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:12,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984384798] [2021-06-05 14:12:12,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:12,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:12,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984384798] [2021-06-05 14:12:12,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984384798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:12,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082812828] [2021-06-05 14:12:12,434 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:12,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:12:12,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:12,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:12:12,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:12,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082812828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:12,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:12,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:12:12,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236533361] [2021-06-05 14:12:12,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:12:12,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:12,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:12:12,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:12:12,511 INFO L87 Difference]: Start difference. First operand 36554 states and 123836 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:12,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:12,765 INFO L93 Difference]: Finished difference Result 37526 states and 126283 transitions. [2021-06-05 14:12:12,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:12:12,766 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:12:12,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:12,848 INFO L225 Difference]: With dead ends: 37526 [2021-06-05 14:12:12,848 INFO L226 Difference]: Without dead ends: 37526 [2021-06-05 14:12:12,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=212, Invalid=340, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:12:12,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37526 states. [2021-06-05 14:12:13,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37526 to 36659. [2021-06-05 14:12:13,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36659 states, 36658 states have (on average 3.386627748376889) internal successors, (124147), 36658 states have internal predecessors, (124147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:13,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36659 states to 36659 states and 124147 transitions. [2021-06-05 14:12:13,849 INFO L78 Accepts]: Start accepts. Automaton has 36659 states and 124147 transitions. Word has length 22 [2021-06-05 14:12:13,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:13,849 INFO L482 AbstractCegarLoop]: Abstraction has 36659 states and 124147 transitions. [2021-06-05 14:12:13,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:13,849 INFO L276 IsEmpty]: Start isEmpty. Operand 36659 states and 124147 transitions. [2021-06-05 14:12:13,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:13,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:13,858 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:14,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21647,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:14,075 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:14,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:14,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1272312163, now seen corresponding path program 282 times [2021-06-05 14:12:14,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:14,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704846402] [2021-06-05 14:12:14,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:14,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:14,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704846402] [2021-06-05 14:12:14,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704846402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:14,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300197972] [2021-06-05 14:12:14,170 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:14,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:12:14,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:14,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:12:14,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:14,257 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:14,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300197972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:14,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:14,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:12:14,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123482161] [2021-06-05 14:12:14,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:12:14,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:14,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:12:14,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:12:14,258 INFO L87 Difference]: Start difference. First operand 36659 states and 124147 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 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 14:12:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:12:14,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21648,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:14,634 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 14:12:14,636 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 14:12:14,637 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 14:12:14,637 INFO L202 PluginConnector]: Adding new model unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 02:12:14 BasicIcfg [2021-06-05 14:12:14,637 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 14:12:14,638 INFO L168 Benchmark]: Toolchain (without parser) took 900455.31 ms. Allocated memory was 404.8 MB in the beginning and 15.9 GB in the end (delta: 15.5 GB). Free memory was 384.3 MB in the beginning and 11.8 GB in the end (delta: -11.4 GB). Peak memory consumption was 4.1 GB. Max. memory is 16.0 GB. [2021-06-05 14:12:14,638 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 404.8 MB. Free memory is still 385.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:12:14,638 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.21 ms. Allocated memory is still 404.8 MB. Free memory was 384.1 MB in the beginning and 382.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:12:14,638 INFO L168 Benchmark]: Boogie Preprocessor took 10.01 ms. Allocated memory is still 404.8 MB. Free memory was 382.7 MB in the beginning and 381.7 MB in the end (delta: 996.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:12:14,638 INFO L168 Benchmark]: RCFGBuilder took 326.12 ms. Allocated memory is still 404.8 MB. Free memory was 381.7 MB in the beginning and 364.6 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-06-05 14:12:14,638 INFO L168 Benchmark]: TraceAbstraction took 900092.89 ms. Allocated memory was 404.8 MB in the beginning and 15.9 GB in the end (delta: 15.5 GB). Free memory was 364.1 MB in the beginning and 11.8 GB in the end (delta: -11.4 GB). Peak memory consumption was 4.1 GB. Max. memory is 16.0 GB. [2021-06-05 14:12:14,638 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 404.8 MB. Free memory is still 385.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.21 ms. Allocated memory is still 404.8 MB. Free memory was 384.1 MB in the beginning and 382.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.01 ms. Allocated memory is still 404.8 MB. Free memory was 382.7 MB in the beginning and 381.7 MB in the end (delta: 996.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 326.12 ms. Allocated memory is still 404.8 MB. Free memory was 381.7 MB in the beginning and 364.6 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 900092.89 ms. Allocated memory was 404.8 MB in the beginning and 15.9 GB in the end (delta: 15.5 GB). Free memory was 364.1 MB in the beginning and 11.8 GB in the end (delta: -11.4 GB). Peak memory consumption was 4.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 54]: 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 (36659states) and FLOYD_HOARE automaton (currently 24 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (10671 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 54]: 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 (36659states) and FLOYD_HOARE automaton (currently 24 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (10671 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (36659states) and FLOYD_HOARE automaton (currently 24 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (10671 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 900033.7ms, OverallIterations: 286, TraceHistogramMax: 11, EmptinessCheckTime: 1483.6ms, AutomataDifference: 78837.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6160 SDtfs, 23876 SDslu, 38034 SDs, 0 SdLazy, 42118 SolverSat, 6983 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16681.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12043 GetRequests, 5473 SyntacticMatches, 133 SemanticMatches, 6437 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39522 ImplicationChecksByTransitivity, 40703.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=51187occurred in iteration=151, InterpolantAutomatonStates: 5914, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 110281.1ms AutomataMinimizationTime, 285 MinimizatonAttempts, 262437 StatesRemovedByMinimization, 278 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 860.6ms SsaConstructionTime, 3763.2ms SatisfiabilityAnalysisTime, 639142.2ms InterpolantComputationTime, 11635 NumberOfCodeBlocks, 11634 NumberOfCodeBlocksAsserted, 1299 NumberOfCheckSat, 11066 ConstructedInterpolants, 0 QuantifiedInterpolants, 48752 SizeOfPredicates, 179 NumberOfNonLiveVariables, 23633 ConjunctsInSsa, 4095 ConjunctsInUnsatCore, 569 InterpolantComputations, 3 PerfectInterpolantSequences, 10511/30624 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