/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:53:44,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:53:44,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:53:44,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:53:44,177 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 17:53:44,216 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:53:44,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:53:44,216 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:53:44,217 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:53:44,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:53:44,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:53:44,219 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:53:44,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:53:44,219 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:53:44,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:53:44,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:53:44,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:53:44,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:53:44,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:53:44,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:53:44,221 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:53:44,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:53:44,221 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:53:44,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:53:44,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:53:44,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:53:44,222 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:53:44,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:53:44,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:53:44,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:53:44,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:53:44,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:53:44,223 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:53:44,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:53:44,223 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:53:44,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:53:44,223 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:53:44,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:53:44,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:53:44,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:53:44,528 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:53:44,529 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:53:44,530 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl [2021-07-09 17:53:44,530 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl' [2021-07-09 17:53:44,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:53:44,572 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:53:44,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:53:44,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:53:44,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:53:44,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:53:44" (1/1) ... [2021-07-09 17:53:44,589 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:53:44" (1/1) ... [2021-07-09 17:53:44,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:53:44,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:53:44,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:53:44,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:53:44,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:53:44" (1/1) ... [2021-07-09 17:53:44,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:53:44" (1/1) ... [2021-07-09 17:53:44,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:53:44" (1/1) ... [2021-07-09 17:53:44,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:53:44" (1/1) ... [2021-07-09 17:53:44,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:53:44" (1/1) ... [2021-07-09 17:53:44,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:53:44" (1/1) ... [2021-07-09 17:53:44,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:53:44" (1/1) ... [2021-07-09 17:53:44,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:53:44,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:53:44,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:53:44,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:53:44,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:53:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:53:44,670 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:53:44,670 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:53:44,671 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:53:44,671 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:53:44,671 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:53:44,671 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:53:44,671 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:53:44,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:53:44,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:53:44,672 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:53:44,815 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:53:44,815 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-09 17:53:44,816 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-09 17:53:44,817 INFO L202 PluginConnector]: Adding new model channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:53:44 BoogieIcfgContainer [2021-07-09 17:53:44,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:53:44,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:53:44,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:53:44,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:53:44,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:53:44" (1/2) ... [2021-07-09 17:53:44,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70454c9d and model type channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:53:44, skipping insertion in model container [2021-07-09 17:53:44,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:53:44" (2/2) ... [2021-07-09 17:53:44,824 INFO L111 eAbstractionObserver]: Analyzing ICFG channel-sum.wvr.bpl [2021-07-09 17:53:44,828 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:53:44,828 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:53:44,828 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:53:44,829 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:53:44,852 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 17:53:44,871 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 17:53:44,887 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:53:44,887 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:53:44,887 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:53:44,887 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:53:44,887 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:53:44,888 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:53:44,888 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:53:44,888 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:53:44,896 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 26 places, 22 transitions, 60 flow [2021-07-09 17:53:44,907 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:44,909 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:44,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:53:44,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:44,914 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:44,915 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:44,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:44,919 INFO L82 PathProgramCache]: Analyzing trace with hash 10984786, now seen corresponding path program 1 times [2021-07-09 17:53:44,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:44,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170388492] [2021-07-09 17:53:44,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:45,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:45,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:45,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170388492] [2021-07-09 17:53:45,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170388492] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:53:45,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:53:45,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:53:45,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974130376] [2021-07-09 17:53:45,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:53:45,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:45,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:53:45,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:53:45,149 INFO L87 Difference]: Start difference. First operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) 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) [2021-07-09 17:53:45,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:45,190 INFO L93 Difference]: Finished difference Result 54 states and 108 transitions. [2021-07-09 17:53:45,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:53:45,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) 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 [2021-07-09 17:53:45,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:45,199 INFO L225 Difference]: With dead ends: 54 [2021-07-09 17:53:45,199 INFO L226 Difference]: Without dead ends: 42 [2021-07-09 17:53:45,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:53:45,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-07-09 17:53:45,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-07-09 17:53:45,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 70 transitions. [2021-07-09 17:53:45,244 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 70 transitions. Word has length 11 [2021-07-09 17:53:45,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:45,245 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 70 transitions. [2021-07-09 17:53:45,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) 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) [2021-07-09 17:53:45,245 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 70 transitions. [2021-07-09 17:53:45,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:53:45,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:45,247 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:45,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:53:45,248 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:45,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:45,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1844506957, now seen corresponding path program 1 times [2021-07-09 17:53:45,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:45,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670832017] [2021-07-09 17:53:45,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:45,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:45,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670832017] [2021-07-09 17:53:45,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670832017] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:53:45,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:53:45,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 17:53:45,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047599799] [2021-07-09 17:53:45,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:53:45,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:45,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:53:45,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:53:45,314 INFO L87 Difference]: Start difference. First operand 36 states and 70 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:45,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:45,333 INFO L93 Difference]: Finished difference Result 37 states and 68 transitions. [2021-07-09 17:53:45,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:53:45,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:53:45,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:45,335 INFO L225 Difference]: With dead ends: 37 [2021-07-09 17:53:45,335 INFO L226 Difference]: Without dead ends: 36 [2021-07-09 17:53:45,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:53:45,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-07-09 17:53:45,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-07-09 17:53:45,340 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) [2021-07-09 17:53:45,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-07-09 17:53:45,341 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 13 [2021-07-09 17:53:45,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:45,341 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-07-09 17:53:45,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:45,342 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-07-09 17:53:45,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:53:45,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:45,342 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:45,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:53:45,343 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:45,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:45,343 INFO L82 PathProgramCache]: Analyzing trace with hash 244145385, now seen corresponding path program 1 times [2021-07-09 17:53:45,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:45,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800784935] [2021-07-09 17:53:45,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:45,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:45,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800784935] [2021-07-09 17:53:45,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800784935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:45,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574976829] [2021-07-09 17:53:45,480 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 [2021-07-09 17:53:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:45,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:53:45,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:45,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:53:45,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:45,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:45,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:45,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-07-09 17:53:45,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:45,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574976829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:45,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:45,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 17:53:45,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003580816] [2021-07-09 17:53:45,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:53:45,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:45,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:53:45,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:53:45,771 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:45,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:45,823 INFO L93 Difference]: Finished difference Result 67 states and 134 transitions. [2021-07-09 17:53:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:53:45,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:53:45,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:45,824 INFO L225 Difference]: With dead ends: 67 [2021-07-09 17:53:45,824 INFO L226 Difference]: Without dead ends: 56 [2021-07-09 17:53:45,825 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:53:45,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-07-09 17:53:45,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-07-09 17:53:45,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:45,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 89 transitions. [2021-07-09 17:53:45,831 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 89 transitions. Word has length 16 [2021-07-09 17:53:45,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:45,831 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 89 transitions. [2021-07-09 17:53:45,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:45,831 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 89 transitions. [2021-07-09 17:53:45,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:53:45,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:45,832 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:46,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-09 17:53:46,056 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:46,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:46,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1749319479, now seen corresponding path program 1 times [2021-07-09 17:53:46,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:46,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795870734] [2021-07-09 17:53:46,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:53:46,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:46,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795870734] [2021-07-09 17:53:46,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795870734] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:53:46,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:53:46,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:53:46,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701527620] [2021-07-09 17:53:46,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:53:46,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:46,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:53:46,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:53:46,070 INFO L87 Difference]: Start difference. First operand 46 states and 89 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:46,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:46,076 INFO L93 Difference]: Finished difference Result 52 states and 101 transitions. [2021-07-09 17:53:46,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:53:46,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:53:46,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:46,077 INFO L225 Difference]: With dead ends: 52 [2021-07-09 17:53:46,077 INFO L226 Difference]: Without dead ends: 52 [2021-07-09 17:53:46,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:53:46,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-07-09 17:53:46,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2021-07-09 17:53:46,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:46,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 87 transitions. [2021-07-09 17:53:46,082 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 87 transitions. Word has length 16 [2021-07-09 17:53:46,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:46,082 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 87 transitions. [2021-07-09 17:53:46,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 87 transitions. [2021-07-09 17:53:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:53:46,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:46,083 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:46,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:53:46,084 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:46,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:46,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1115470710, now seen corresponding path program 2 times [2021-07-09 17:53:46,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:46,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576244183] [2021-07-09 17:53:46,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:46,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:46,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576244183] [2021-07-09 17:53:46,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576244183] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:53:46,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:53:46,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:53:46,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125311938] [2021-07-09 17:53:46,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:53:46,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:46,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:53:46,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:53:46,142 INFO L87 Difference]: Start difference. First operand 45 states and 87 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:46,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:46,167 INFO L93 Difference]: Finished difference Result 116 states and 226 transitions. [2021-07-09 17:53:46,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:53:46,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:53:46,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:46,173 INFO L225 Difference]: With dead ends: 116 [2021-07-09 17:53:46,173 INFO L226 Difference]: Without dead ends: 113 [2021-07-09 17:53:46,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:53:46,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-07-09 17:53:46,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2021-07-09 17:53:46,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.104651162790698) internal successors, (181), 86 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:46,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 181 transitions. [2021-07-09 17:53:46,189 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 181 transitions. Word has length 18 [2021-07-09 17:53:46,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:46,189 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 181 transitions. [2021-07-09 17:53:46,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:46,190 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 181 transitions. [2021-07-09 17:53:46,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:53:46,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:46,191 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:46,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:53:46,191 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:46,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:46,191 INFO L82 PathProgramCache]: Analyzing trace with hash -686636110, now seen corresponding path program 3 times [2021-07-09 17:53:46,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:46,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053035453] [2021-07-09 17:53:46,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:46,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:53:46,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:46,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053035453] [2021-07-09 17:53:46,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053035453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:46,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696275396] [2021-07-09 17:53:46,230 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 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 [2021-07-09 17:53:46,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:53:46,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:46,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 17:53:46,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:53:46,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696275396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:46,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:46,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 17:53:46,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735339098] [2021-07-09 17:53:46,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:53:46,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:46,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:53:46,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:53:46,296 INFO L87 Difference]: Start difference. First operand 87 states and 181 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2021-07-09 17:53:46,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:46,306 INFO L93 Difference]: Finished difference Result 118 states and 228 transitions. [2021-07-09 17:53:46,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:53:46,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:53:46,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:46,308 INFO L225 Difference]: With dead ends: 118 [2021-07-09 17:53:46,308 INFO L226 Difference]: Without dead ends: 118 [2021-07-09 17:53:46,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:53:46,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-07-09 17:53:46,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 104. [2021-07-09 17:53:46,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:46,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 213 transitions. [2021-07-09 17:53:46,323 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 213 transitions. Word has length 21 [2021-07-09 17:53:46,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:46,324 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 213 transitions. [2021-07-09 17:53:46,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2021-07-09 17:53:46,324 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 213 transitions. [2021-07-09 17:53:46,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:53:46,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:46,325 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:46,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:46,526 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:46,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:46,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1614866322, now seen corresponding path program 1 times [2021-07-09 17:53:46,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:46,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499000719] [2021-07-09 17:53:46,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:46,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:46,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:46,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499000719] [2021-07-09 17:53:46,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499000719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:46,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884977911] [2021-07-09 17:53:46,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:46,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:53:46,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:46,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:46,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:46,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:46,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-07-09 17:53:46,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:46,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:46,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:46,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:12 [2021-07-09 17:53:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:46,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884977911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:46,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:46,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:53:46,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127589898] [2021-07-09 17:53:46,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:53:46,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:46,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:53:46,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:53:46,947 INFO L87 Difference]: Start difference. First operand 104 states and 213 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) [2021-07-09 17:53:47,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:47,010 INFO L93 Difference]: Finished difference Result 175 states and 364 transitions. [2021-07-09 17:53:47,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:53:47,011 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 21 [2021-07-09 17:53:47,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:47,012 INFO L225 Difference]: With dead ends: 175 [2021-07-09 17:53:47,012 INFO L226 Difference]: Without dead ends: 157 [2021-07-09 17:53:47,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:53:47,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-09 17:53:47,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 119. [2021-07-09 17:53:47,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.0508474576271185) internal successors, (242), 118 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:47,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 242 transitions. [2021-07-09 17:53:47,021 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 242 transitions. Word has length 21 [2021-07-09 17:53:47,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:47,021 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 242 transitions. [2021-07-09 17:53:47,022 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) [2021-07-09 17:53:47,022 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 242 transitions. [2021-07-09 17:53:47,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:53:47,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:47,023 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:47,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:47,246 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:47,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:47,247 INFO L82 PathProgramCache]: Analyzing trace with hash 466490442, now seen corresponding path program 2 times [2021-07-09 17:53:47,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:47,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778677851] [2021-07-09 17:53:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:47,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:47,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778677851] [2021-07-09 17:53:47,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778677851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:47,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831130689] [2021-07-09 17:53:47,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:47,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:47,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:47,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:53:47,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:47,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:47,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:47,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-07-09 17:53:47,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:47,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:47,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:47,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:12 [2021-07-09 17:53:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:47,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831130689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:47,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:47,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:53:47,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696354033] [2021-07-09 17:53:47,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:53:47,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:47,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:53:47,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:53:47,687 INFO L87 Difference]: Start difference. First operand 119 states and 242 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) [2021-07-09 17:53:47,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:47,771 INFO L93 Difference]: Finished difference Result 209 states and 432 transitions. [2021-07-09 17:53:47,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:53:47,772 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 21 [2021-07-09 17:53:47,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:47,773 INFO L225 Difference]: With dead ends: 209 [2021-07-09 17:53:47,773 INFO L226 Difference]: Without dead ends: 190 [2021-07-09 17:53:47,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:53:47,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-07-09 17:53:47,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 123. [2021-07-09 17:53:47,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.040983606557377) internal successors, (249), 122 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 249 transitions. [2021-07-09 17:53:47,791 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 249 transitions. Word has length 21 [2021-07-09 17:53:47,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:47,791 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 249 transitions. [2021-07-09 17:53:47,791 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) [2021-07-09 17:53:47,791 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 249 transitions. [2021-07-09 17:53:47,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:53:47,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:47,796 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:48,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:48,020 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:48,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:48,020 INFO L82 PathProgramCache]: Analyzing trace with hash -870312972, now seen corresponding path program 3 times [2021-07-09 17:53:48,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:48,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890315219] [2021-07-09 17:53:48,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:48,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:48,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890315219] [2021-07-09 17:53:48,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890315219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:48,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110516283] [2021-07-09 17:53:48,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:53:48,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:53:48,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:48,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:53:48,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:48,266 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 17:53:48,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2021-07-09 17:53:48,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:48,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:48,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:48,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-09 17:53:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:48,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110516283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:48,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:48,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:53:48,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722767915] [2021-07-09 17:53:48,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:53:48,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:48,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:53:48,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:53:48,288 INFO L87 Difference]: Start difference. First operand 123 states and 249 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-07-09 17:53:48,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:48,383 INFO L93 Difference]: Finished difference Result 180 states and 370 transitions. [2021-07-09 17:53:48,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:53:48,383 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 21 [2021-07-09 17:53:48,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:48,384 INFO L225 Difference]: With dead ends: 180 [2021-07-09 17:53:48,385 INFO L226 Difference]: Without dead ends: 165 [2021-07-09 17:53:48,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:53:48,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-07-09 17:53:48,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 130. [2021-07-09 17:53:48,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.046511627906977) internal successors, (264), 129 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:48,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 264 transitions. [2021-07-09 17:53:48,389 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 264 transitions. Word has length 21 [2021-07-09 17:53:48,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:48,390 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 264 transitions. [2021-07-09 17:53:48,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-07-09 17:53:48,390 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 264 transitions. [2021-07-09 17:53:48,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:53:48,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:48,391 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:48,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:48,609 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:48,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:48,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1631872213, now seen corresponding path program 4 times [2021-07-09 17:53:48,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:48,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397090195] [2021-07-09 17:53:48,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:48,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:48,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397090195] [2021-07-09 17:53:48,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397090195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:48,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075345122] [2021-07-09 17:53:48,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:48,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:53:48,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:48,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:53:48,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:48,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075345122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:48,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:48,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-09 17:53:48,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126372045] [2021-07-09 17:53:48,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:53:48,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:48,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:53:48,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:53:48,720 INFO L87 Difference]: Start difference. First operand 130 states and 264 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:48,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:48,738 INFO L93 Difference]: Finished difference Result 267 states and 530 transitions. [2021-07-09 17:53:48,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:53:48,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:53:48,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:48,739 INFO L225 Difference]: With dead ends: 267 [2021-07-09 17:53:48,740 INFO L226 Difference]: Without dead ends: 262 [2021-07-09 17:53:48,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:53:48,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-09 17:53:48,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 163. [2021-07-09 17:53:48,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.0925925925925926) internal successors, (339), 162 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:48,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 339 transitions. [2021-07-09 17:53:48,745 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 339 transitions. Word has length 23 [2021-07-09 17:53:48,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:48,745 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 339 transitions. [2021-07-09 17:53:48,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:48,745 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 339 transitions. [2021-07-09 17:53:48,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:53:48,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:48,746 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:48,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:48,969 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:48,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:48,969 INFO L82 PathProgramCache]: Analyzing trace with hash 979925673, now seen corresponding path program 5 times [2021-07-09 17:53:48,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:48,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220307226] [2021-07-09 17:53:48,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:53:49,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:49,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220307226] [2021-07-09 17:53:49,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220307226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:49,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801225317] [2021-07-09 17:53:49,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:49,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:53:49,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:49,193 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:53:49,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:49,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:49,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:49,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:49,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:49,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:49,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:49,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:49,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 17:53:49,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:49,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:49,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:49,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-07-09 17:53:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:49,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801225317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:49,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:49,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-09 17:53:49,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096902891] [2021-07-09 17:53:49,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:53:49,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:49,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:53:49,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:53:49,473 INFO L87 Difference]: Start difference. First operand 163 states and 339 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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) [2021-07-09 17:53:49,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:49,633 INFO L93 Difference]: Finished difference Result 337 states and 691 transitions. [2021-07-09 17:53:49,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:53:49,634 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 26 [2021-07-09 17:53:49,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:49,635 INFO L225 Difference]: With dead ends: 337 [2021-07-09 17:53:49,635 INFO L226 Difference]: Without dead ends: 264 [2021-07-09 17:53:49,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 322.5ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:53:49,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-07-09 17:53:49,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 202. [2021-07-09 17:53:49,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.0696517412935322) internal successors, (416), 201 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:49,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 416 transitions. [2021-07-09 17:53:49,642 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 416 transitions. Word has length 26 [2021-07-09 17:53:49,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:49,642 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 416 transitions. [2021-07-09 17:53:49,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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) [2021-07-09 17:53:49,642 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 416 transitions. [2021-07-09 17:53:49,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:53:49,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:49,643 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:49,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:49,857 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:49,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:49,857 INFO L82 PathProgramCache]: Analyzing trace with hash -494046431, now seen corresponding path program 6 times [2021-07-09 17:53:49,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:49,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491813321] [2021-07-09 17:53:49,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:50,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:50,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491813321] [2021-07-09 17:53:50,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491813321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:50,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929168176] [2021-07-09 17:53:50,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:50,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:53:50,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:50,103 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:53:50,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:50,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:50,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:50,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:50,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:50,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:50,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:50,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 17:53:50,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:50,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:50,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:50,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-07-09 17:53:50,382 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:50,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929168176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:50,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:50,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-09 17:53:50,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790928615] [2021-07-09 17:53:50,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:53:50,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:50,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:53:50,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:53:50,384 INFO L87 Difference]: Start difference. First operand 202 states and 416 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:50,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:50,504 INFO L93 Difference]: Finished difference Result 375 states and 785 transitions. [2021-07-09 17:53:50,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:53:50,505 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:53:50,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:50,507 INFO L225 Difference]: With dead ends: 375 [2021-07-09 17:53:50,507 INFO L226 Difference]: Without dead ends: 339 [2021-07-09 17:53:50,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 302.8ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:53:50,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-07-09 17:53:50,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 214. [2021-07-09 17:53:50,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.056338028169014) internal successors, (438), 213 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:50,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 438 transitions. [2021-07-09 17:53:50,514 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 438 transitions. Word has length 26 [2021-07-09 17:53:50,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:50,514 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 438 transitions. [2021-07-09 17:53:50,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:50,514 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 438 transitions. [2021-07-09 17:53:50,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:53:50,515 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:50,515 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:50,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-09 17:53:50,737 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:50,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:50,737 INFO L82 PathProgramCache]: Analyzing trace with hash 960569099, now seen corresponding path program 7 times [2021-07-09 17:53:50,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:50,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480970816] [2021-07-09 17:53:50,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:50,941 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:50,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:50,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480970816] [2021-07-09 17:53:50,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480970816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:50,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404439875] [2021-07-09 17:53:50,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:50,981 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:53:50,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:51,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:51,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:51,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:51,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:51,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:51,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:51,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:51,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 17:53:51,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:51,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:51,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:51,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-07-09 17:53:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:51,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404439875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:51,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:51,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-09 17:53:51,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686918600] [2021-07-09 17:53:51,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:53:51,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:51,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:53:51,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:53:51,277 INFO L87 Difference]: Start difference. First operand 214 states and 438 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:51,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:51,418 INFO L93 Difference]: Finished difference Result 372 states and 766 transitions. [2021-07-09 17:53:51,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:53:51,419 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:53:51,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:51,422 INFO L225 Difference]: With dead ends: 372 [2021-07-09 17:53:51,422 INFO L226 Difference]: Without dead ends: 352 [2021-07-09 17:53:51,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 290.4ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:53:51,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-07-09 17:53:51,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 217. [2021-07-09 17:53:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.0555555555555554) internal successors, (444), 216 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) [2021-07-09 17:53:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 444 transitions. [2021-07-09 17:53:51,431 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 444 transitions. Word has length 26 [2021-07-09 17:53:51,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:51,431 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 444 transitions. [2021-07-09 17:53:51,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:51,431 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 444 transitions. [2021-07-09 17:53:51,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:53:51,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:51,432 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:51,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:51,645 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:51,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:51,645 INFO L82 PathProgramCache]: Analyzing trace with hash -30244623, now seen corresponding path program 8 times [2021-07-09 17:53:51,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:51,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945079563] [2021-07-09 17:53:51,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:53:51,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:51,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945079563] [2021-07-09 17:53:51,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945079563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:51,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291875948] [2021-07-09 17:53:51,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:51,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:51,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:51,851 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:53:51,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:52,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:52,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:52,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:52,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:52,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:52,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:52,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 17:53:52,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:52,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:52,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:52,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-07-09 17:53:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:52,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291875948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:52,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:52,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-09 17:53:52,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222042130] [2021-07-09 17:53:52,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:53:52,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:52,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:53:52,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:53:52,164 INFO L87 Difference]: Start difference. First operand 217 states and 444 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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) [2021-07-09 17:53:52,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:52,378 INFO L93 Difference]: Finished difference Result 548 states and 1112 transitions. [2021-07-09 17:53:52,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:53:52,379 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 26 [2021-07-09 17:53:52,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:52,382 INFO L225 Difference]: With dead ends: 548 [2021-07-09 17:53:52,382 INFO L226 Difference]: Without dead ends: 426 [2021-07-09 17:53:52,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 314.4ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:53:52,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-07-09 17:53:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 247. [2021-07-09 17:53:52,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.024390243902439) internal successors, (498), 246 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:52,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 498 transitions. [2021-07-09 17:53:52,390 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 498 transitions. Word has length 26 [2021-07-09 17:53:52,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:52,390 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 498 transitions. [2021-07-09 17:53:52,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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) [2021-07-09 17:53:52,391 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 498 transitions. [2021-07-09 17:53:52,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:53:52,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:52,391 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:52,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:52,605 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:52,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:52,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1504216727, now seen corresponding path program 9 times [2021-07-09 17:53:52,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:52,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414988427] [2021-07-09 17:53:52,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:52,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:52,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414988427] [2021-07-09 17:53:52,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414988427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:52,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414427369] [2021-07-09 17:53:52,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:52,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:53:52,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:52,803 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:53:52,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:53,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:53,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:53,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:53,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:53,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:53,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:53,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2021-07-09 17:53:53,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:53,123 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.3 percent of original size [2021-07-09 17:53:53,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:53,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:69, output treesize:10 [2021-07-09 17:53:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:53,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414427369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:53,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:53,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-09 17:53:53,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418368703] [2021-07-09 17:53:53,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:53:53,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:53,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:53:53,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:53:53,138 INFO L87 Difference]: Start difference. First operand 247 states and 498 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:53,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:53,512 INFO L93 Difference]: Finished difference Result 598 states and 1212 transitions. [2021-07-09 17:53:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:53:53,513 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:53:53,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:53,515 INFO L225 Difference]: With dead ends: 598 [2021-07-09 17:53:53,515 INFO L226 Difference]: Without dead ends: 496 [2021-07-09 17:53:53,518 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 374.9ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:53:53,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-07-09 17:53:53,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 235. [2021-07-09 17:53:53,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.051282051282051) internal successors, (480), 234 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:53,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 480 transitions. [2021-07-09 17:53:53,526 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 480 transitions. Word has length 26 [2021-07-09 17:53:53,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:53,526 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 480 transitions. [2021-07-09 17:53:53,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:53,526 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 480 transitions. [2021-07-09 17:53:53,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:53:53,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:53,527 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:53,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 17:53:53,741 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:53,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:53,741 INFO L82 PathProgramCache]: Analyzing trace with hash -49601197, now seen corresponding path program 10 times [2021-07-09 17:53:53,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:53,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089944985] [2021-07-09 17:53:53,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:53,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:53,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089944985] [2021-07-09 17:53:53,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089944985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:53,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719602015] [2021-07-09 17:53:53,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:53,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:53:53,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:53,943 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:53:53,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:54,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:54,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:54,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:54,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:54,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:54,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:54,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 17:53:54,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:54,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:54,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:54,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-07-09 17:53:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:54,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719602015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:54,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:54,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-09 17:53:54,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390544979] [2021-07-09 17:53:54,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:53:54,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:54,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:53:54,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:53:54,211 INFO L87 Difference]: Start difference. First operand 235 states and 480 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:54,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:54,426 INFO L93 Difference]: Finished difference Result 470 states and 964 transitions. [2021-07-09 17:53:54,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:53:54,426 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:53:54,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:54,429 INFO L225 Difference]: With dead ends: 470 [2021-07-09 17:53:54,429 INFO L226 Difference]: Without dead ends: 450 [2021-07-09 17:53:54,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 269.2ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:53:54,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-07-09 17:53:54,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 235. [2021-07-09 17:53:54,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.051282051282051) internal successors, (480), 234 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:54,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 480 transitions. [2021-07-09 17:53:54,445 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 480 transitions. Word has length 26 [2021-07-09 17:53:54,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:54,445 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 480 transitions. [2021-07-09 17:53:54,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:54,445 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 480 transitions. [2021-07-09 17:53:54,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:53:54,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:54,446 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:54,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 17:53:54,661 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:54,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:54,661 INFO L82 PathProgramCache]: Analyzing trace with hash 802414539, now seen corresponding path program 11 times [2021-07-09 17:53:54,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:54,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635619496] [2021-07-09 17:53:54,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:54,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:54,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635619496] [2021-07-09 17:53:54,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635619496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:54,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007156113] [2021-07-09 17:53:54,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:54,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:53:54,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:54,832 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:53:54,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:55,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:55,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:55,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:55,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:55,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:55,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:55,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:55,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 17:53:55,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:55,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:55,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:55,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-07-09 17:53:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:55,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007156113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:55,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:55,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-09 17:53:55,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074272363] [2021-07-09 17:53:55,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:53:55,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:55,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:53:55,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:53:55,117 INFO L87 Difference]: Start difference. First operand 235 states and 480 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:55,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:55,285 INFO L93 Difference]: Finished difference Result 414 states and 855 transitions. [2021-07-09 17:53:55,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:53:55,286 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:53:55,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:55,287 INFO L225 Difference]: With dead ends: 414 [2021-07-09 17:53:55,287 INFO L226 Difference]: Without dead ends: 393 [2021-07-09 17:53:55,288 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 296.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:53:55,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-07-09 17:53:55,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 245. [2021-07-09 17:53:55,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.05327868852459) internal successors, (501), 244 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:55,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 501 transitions. [2021-07-09 17:53:55,295 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 501 transitions. Word has length 26 [2021-07-09 17:53:55,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:55,295 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 501 transitions. [2021-07-09 17:53:55,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:55,295 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 501 transitions. [2021-07-09 17:53:55,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:53:55,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:55,296 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:55,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 17:53:55,496 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:55,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:55,497 INFO L82 PathProgramCache]: Analyzing trace with hash 509590407, now seen corresponding path program 12 times [2021-07-09 17:53:55,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:55,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762557391] [2021-07-09 17:53:55,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:53:55,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:55,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762557391] [2021-07-09 17:53:55,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762557391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:55,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188097115] [2021-07-09 17:53:55,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:55,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:53:55,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:55,699 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:53:55,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:55,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:55,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:55,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:55,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:55,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 17:53:55,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:55,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:55,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:55,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-07-09 17:53:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:55,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188097115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:55,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:55,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-07-09 17:53:55,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895907722] [2021-07-09 17:53:55,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:53:55,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:55,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:53:55,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:53:55,918 INFO L87 Difference]: Start difference. First operand 245 states and 501 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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) [2021-07-09 17:53:56,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:56,196 INFO L93 Difference]: Finished difference Result 610 states and 1221 transitions. [2021-07-09 17:53:56,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:53:56,197 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:53:56,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:56,199 INFO L225 Difference]: With dead ends: 610 [2021-07-09 17:53:56,199 INFO L226 Difference]: Without dead ends: 465 [2021-07-09 17:53:56,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 356.3ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:53:56,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-07-09 17:53:56,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 293. [2021-07-09 17:53:56,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.0136986301369864) internal successors, (588), 292 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:56,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 588 transitions. [2021-07-09 17:53:56,208 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 588 transitions. Word has length 26 [2021-07-09 17:53:56,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:56,208 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 588 transitions. [2021-07-09 17:53:56,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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) [2021-07-09 17:53:56,208 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 588 transitions. [2021-07-09 17:53:56,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:53:56,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:56,209 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:56,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:56,429 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:56,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:56,429 INFO L82 PathProgramCache]: Analyzing trace with hash -964381697, now seen corresponding path program 13 times [2021-07-09 17:53:56,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:56,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083095566] [2021-07-09 17:53:56,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:56,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:56,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083095566] [2021-07-09 17:53:56,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083095566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:56,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977711786] [2021-07-09 17:53:56,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:56,654 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:53:56,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:56,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:56,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:56,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:56,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:56,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:56,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:56,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 17:53:56,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:56,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:56,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:56,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-07-09 17:53:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:56,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977711786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:56,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:56,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-09 17:53:56,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134639325] [2021-07-09 17:53:56,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:53:56,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:56,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:53:56,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:53:56,896 INFO L87 Difference]: Start difference. First operand 293 states and 588 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:57,131 INFO L93 Difference]: Finished difference Result 634 states and 1305 transitions. [2021-07-09 17:53:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:53:57,131 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:53:57,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:57,134 INFO L225 Difference]: With dead ends: 634 [2021-07-09 17:53:57,134 INFO L226 Difference]: Without dead ends: 581 [2021-07-09 17:53:57,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:53:57,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-07-09 17:53:57,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 290. [2021-07-09 17:53:57,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.013840830449827) internal successors, (582), 289 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:57,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 582 transitions. [2021-07-09 17:53:57,142 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 582 transitions. Word has length 26 [2021-07-09 17:53:57,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:57,142 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 582 transitions. [2021-07-09 17:53:57,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:57,143 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 582 transitions. [2021-07-09 17:53:57,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:53:57,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:57,143 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:57,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:57,367 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:57,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:57,367 INFO L82 PathProgramCache]: Analyzing trace with hash 490233833, now seen corresponding path program 14 times [2021-07-09 17:53:57,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:57,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093317926] [2021-07-09 17:53:57,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:57,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:57,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093317926] [2021-07-09 17:53:57,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093317926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:57,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504472356] [2021-07-09 17:53:57,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:57,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:57,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:57,560 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:53:57,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:57,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:57,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:57,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:57,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:57,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 17:53:57,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:57,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:57,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:57,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-07-09 17:53:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:57,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504472356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:57,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:57,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-09 17:53:57,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345485919] [2021-07-09 17:53:57,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:53:57,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:57,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:53:57,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:53:57,823 INFO L87 Difference]: Start difference. First operand 290 states and 582 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:58,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:58,009 INFO L93 Difference]: Finished difference Result 541 states and 1096 transitions. [2021-07-09 17:53:58,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:53:58,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:53:58,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:58,012 INFO L225 Difference]: With dead ends: 541 [2021-07-09 17:53:58,012 INFO L226 Difference]: Without dead ends: 521 [2021-07-09 17:53:58,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 299.4ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:53:58,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-09 17:53:58,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 290. [2021-07-09 17:53:58,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.013840830449827) internal successors, (582), 289 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 582 transitions. [2021-07-09 17:53:58,019 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 582 transitions. Word has length 26 [2021-07-09 17:53:58,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:58,020 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 582 transitions. [2021-07-09 17:53:58,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:58,020 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 582 transitions. [2021-07-09 17:53:58,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:53:58,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:58,021 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:58,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:58,234 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:58,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:58,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1342249569, now seen corresponding path program 15 times [2021-07-09 17:53:58,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:58,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664516208] [2021-07-09 17:53:58,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:58,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:58,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664516208] [2021-07-09 17:53:58,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664516208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:58,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664389589] [2021-07-09 17:53:58,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:58,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:53:58,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:58,428 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:53:58,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:58,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:58,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:58,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:58,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:58,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:58,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 17:53:58,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:58,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:58,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:58,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-07-09 17:53:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:58,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664389589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:58,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:58,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-09 17:53:58,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146580923] [2021-07-09 17:53:58,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:53:58,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:58,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:53:58,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:53:58,693 INFO L87 Difference]: Start difference. First operand 290 states and 582 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:59,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:59,019 INFO L93 Difference]: Finished difference Result 524 states and 1067 transitions. [2021-07-09 17:53:59,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:53:59,019 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:53:59,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:59,021 INFO L225 Difference]: With dead ends: 524 [2021-07-09 17:53:59,022 INFO L226 Difference]: Without dead ends: 503 [2021-07-09 17:53:59,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 311.0ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:53:59,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-07-09 17:53:59,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 272. [2021-07-09 17:53:59,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.992619926199262) internal successors, (540), 271 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:59,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 540 transitions. [2021-07-09 17:53:59,031 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 540 transitions. Word has length 26 [2021-07-09 17:53:59,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:59,031 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 540 transitions. [2021-07-09 17:53:59,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:59,031 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 540 transitions. [2021-07-09 17:53:59,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:53:59,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:59,032 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:59,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 17:53:59,256 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:59,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:59,257 INFO L82 PathProgramCache]: Analyzing trace with hash -931564597, now seen corresponding path program 16 times [2021-07-09 17:53:59,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:59,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25073459] [2021-07-09 17:53:59,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:59,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:59,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25073459] [2021-07-09 17:53:59,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25073459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:59,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842250166] [2021-07-09 17:53:59,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:59,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:53:59,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:59,458 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:53:59,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:59,612 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 17:53:59,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 17:53:59,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:59,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:59,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:59,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-09 17:53:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:59,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842250166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:59,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:59,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-09 17:53:59,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620773470] [2021-07-09 17:53:59,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:53:59,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:59,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:53:59,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:53:59,630 INFO L87 Difference]: Start difference. First operand 272 states and 540 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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) [2021-07-09 17:53:59,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:59,781 INFO L93 Difference]: Finished difference Result 369 states and 744 transitions. [2021-07-09 17:53:59,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:53:59,781 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:53:59,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:59,782 INFO L225 Difference]: With dead ends: 369 [2021-07-09 17:53:59,782 INFO L226 Difference]: Without dead ends: 354 [2021-07-09 17:53:59,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 238.6ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:53:59,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-07-09 17:53:59,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 279. [2021-07-09 17:53:59,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.9964028776978417) internal successors, (555), 278 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:59,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 555 transitions. [2021-07-09 17:53:59,789 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 555 transitions. Word has length 26 [2021-07-09 17:53:59,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:59,790 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 555 transitions. [2021-07-09 17:53:59,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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) [2021-07-09 17:53:59,790 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 555 transitions. [2021-07-09 17:53:59,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:53:59,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:59,791 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:00,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 17:54:00,014 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:00,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:00,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1396364564, now seen corresponding path program 17 times [2021-07-09 17:54:00,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:00,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872419941] [2021-07-09 17:54:00,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:00,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:00,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872419941] [2021-07-09 17:54:00,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872419941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:00,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893117870] [2021-07-09 17:54:00,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:00,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:54:00,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:00,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:54:00,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:00,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893117870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:00,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:00,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 17:54:00,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306749004] [2021-07-09 17:54:00,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:54:00,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:00,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:54:00,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:54:00,125 INFO L87 Difference]: Start difference. First operand 279 states and 555 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:00,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:00,147 INFO L93 Difference]: Finished difference Result 479 states and 948 transitions. [2021-07-09 17:54:00,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:54:00,147 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:54:00,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:00,149 INFO L225 Difference]: With dead ends: 479 [2021-07-09 17:54:00,149 INFO L226 Difference]: Without dead ends: 472 [2021-07-09 17:54:00,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:54:00,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-07-09 17:54:00,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 320. [2021-07-09 17:54:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.0250783699059562) internal successors, (646), 319 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:00,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 646 transitions. [2021-07-09 17:54:00,156 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 646 transitions. Word has length 28 [2021-07-09 17:54:00,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:00,156 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 646 transitions. [2021-07-09 17:54:00,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:00,156 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 646 transitions. [2021-07-09 17:54:00,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:00,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:00,157 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:00,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 17:54:00,380 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:00,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:00,380 INFO L82 PathProgramCache]: Analyzing trace with hash -160566182, now seen corresponding path program 18 times [2021-07-09 17:54:00,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:00,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371573058] [2021-07-09 17:54:00,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:54:00,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:00,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371573058] [2021-07-09 17:54:00,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371573058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:00,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199250639] [2021-07-09 17:54:00,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:00,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:54:00,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:00,671 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:00,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:01,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:01,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:01,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:01,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:01,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:01,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:01,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:01,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:01,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:01,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:01,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:01,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:01,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:01,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:01,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:01,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:01,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:01,058 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:01,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199250639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:01,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:01,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-07-09 17:54:01,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223062530] [2021-07-09 17:54:01,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:54:01,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:01,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:54:01,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:01,060 INFO L87 Difference]: Start difference. First operand 320 states and 646 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:01,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:01,281 INFO L93 Difference]: Finished difference Result 708 states and 1436 transitions. [2021-07-09 17:54:01,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:54:01,282 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:01,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:01,284 INFO L225 Difference]: With dead ends: 708 [2021-07-09 17:54:01,284 INFO L226 Difference]: Without dead ends: 588 [2021-07-09 17:54:01,285 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 493.7ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:01,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-07-09 17:54:01,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 392. [2021-07-09 17:54:01,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.010230179028133) internal successors, (786), 391 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 786 transitions. [2021-07-09 17:54:01,294 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 786 transitions. Word has length 31 [2021-07-09 17:54:01,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:01,294 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 786 transitions. [2021-07-09 17:54:01,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:01,294 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 786 transitions. [2021-07-09 17:54:01,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:01,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:01,295 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:01,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 17:54:01,496 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:01,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:01,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1308942062, now seen corresponding path program 19 times [2021-07-09 17:54:01,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:01,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65360490] [2021-07-09 17:54:01,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:01,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:01,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65360490] [2021-07-09 17:54:01,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65360490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:01,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941778736] [2021-07-09 17:54:01,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:01,763 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:01,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:02,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:02,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:02,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:02,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:02,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:02,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:02,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:02,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:02,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:02,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:02,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:02,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:02,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:02,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:02,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:02,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:02,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:02,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:02,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:02,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941778736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:02,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:02,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-09 17:54:02,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358912581] [2021-07-09 17:54:02,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:54:02,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:02,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:54:02,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:02,127 INFO L87 Difference]: Start difference. First operand 392 states and 786 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:02,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:02,357 INFO L93 Difference]: Finished difference Result 810 states and 1669 transitions. [2021-07-09 17:54:02,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:54:02,358 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:02,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:02,361 INFO L225 Difference]: With dead ends: 810 [2021-07-09 17:54:02,361 INFO L226 Difference]: Without dead ends: 757 [2021-07-09 17:54:02,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 459.2ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:54:02,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-07-09 17:54:02,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 413. [2021-07-09 17:54:02,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0072815533980584) internal successors, (827), 412 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:02,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 827 transitions. [2021-07-09 17:54:02,370 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 827 transitions. Word has length 31 [2021-07-09 17:54:02,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:02,371 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 827 transitions. [2021-07-09 17:54:02,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:02,371 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 827 transitions. [2021-07-09 17:54:02,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:02,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:02,372 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:02,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 17:54:02,585 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:02,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:02,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1649221820, now seen corresponding path program 20 times [2021-07-09 17:54:02,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:02,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313815565] [2021-07-09 17:54:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:02,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:02,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313815565] [2021-07-09 17:54:02,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313815565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:02,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739276542] [2021-07-09 17:54:02,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:02,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:02,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:02,877 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:02,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:03,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:03,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:03,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:03,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:03,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:03,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:03,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:03,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:03,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:03,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:03,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:03,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:03,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:03,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:03,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:03,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:03,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:03,269 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:03,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739276542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:03,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:03,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-09 17:54:03,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214078407] [2021-07-09 17:54:03,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:54:03,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:03,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:54:03,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:03,272 INFO L87 Difference]: Start difference. First operand 413 states and 827 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:03,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:03,535 INFO L93 Difference]: Finished difference Result 880 states and 1806 transitions. [2021-07-09 17:54:03,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:54:03,536 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:03,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:03,538 INFO L225 Difference]: With dead ends: 880 [2021-07-09 17:54:03,538 INFO L226 Difference]: Without dead ends: 824 [2021-07-09 17:54:03,539 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 519.3ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:54:03,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-07-09 17:54:03,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 425. [2021-07-09 17:54:03,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.009433962264151) internal successors, (852), 424 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 852 transitions. [2021-07-09 17:54:03,548 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 852 transitions. Word has length 31 [2021-07-09 17:54:03,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:03,548 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 852 transitions. [2021-07-09 17:54:03,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:03,549 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 852 transitions. [2021-07-09 17:54:03,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:03,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:03,550 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:03,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:03,765 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:03,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:03,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1866596212, now seen corresponding path program 21 times [2021-07-09 17:54:03,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:03,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056122846] [2021-07-09 17:54:03,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:04,010 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:04,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:04,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056122846] [2021-07-09 17:54:04,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056122846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:04,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110540031] [2021-07-09 17:54:04,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:04,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:54:04,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:04,035 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:04,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:04,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:04,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:04,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:04,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:04,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:04,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:04,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:04,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:04,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:04,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:04,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:04,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:04,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:04,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:04,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:04,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:04,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:04,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110540031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:04,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:04,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-09 17:54:04,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306934837] [2021-07-09 17:54:04,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:54:04,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:04,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:54:04,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:04,458 INFO L87 Difference]: Start difference. First operand 425 states and 852 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:04,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:04,740 INFO L93 Difference]: Finished difference Result 809 states and 1648 transitions. [2021-07-09 17:54:04,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:54:04,741 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:04,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:04,743 INFO L225 Difference]: With dead ends: 809 [2021-07-09 17:54:04,743 INFO L226 Difference]: Without dead ends: 769 [2021-07-09 17:54:04,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 517.0ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:54:04,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-07-09 17:54:04,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 428. [2021-07-09 17:54:04,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.011709601873536) internal successors, (859), 427 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:04,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 859 transitions. [2021-07-09 17:54:04,753 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 859 transitions. Word has length 31 [2021-07-09 17:54:04,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:04,753 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 859 transitions. [2021-07-09 17:54:04,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:04,753 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 859 transitions. [2021-07-09 17:54:04,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:04,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:04,754 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:04,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 17:54:04,965 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:04,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:04,965 INFO L82 PathProgramCache]: Analyzing trace with hash 865807024, now seen corresponding path program 22 times [2021-07-09 17:54:04,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:04,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824752473] [2021-07-09 17:54:04,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:54:05,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:05,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824752473] [2021-07-09 17:54:05,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824752473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:05,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113735754] [2021-07-09 17:54:05,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:05,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:54:05,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:05,185 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:05,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:05,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:05,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:05,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:05,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:05,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:05,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:05,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:05,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:05,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:05,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:05,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:05,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:05,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:05,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:05,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:05,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:05,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:05,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:05,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113735754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:05,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:05,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 21 [2021-07-09 17:54:05,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230221640] [2021-07-09 17:54:05,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:54:05,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:05,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:54:05,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:54:05,501 INFO L87 Difference]: Start difference. First operand 428 states and 859 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:05,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:05,765 INFO L93 Difference]: Finished difference Result 853 states and 1716 transitions. [2021-07-09 17:54:05,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:54:05,765 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:05,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:05,767 INFO L225 Difference]: With dead ends: 853 [2021-07-09 17:54:05,767 INFO L226 Difference]: Without dead ends: 708 [2021-07-09 17:54:05,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 453.6ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:05,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-07-09 17:54:05,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 464. [2021-07-09 17:54:05,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 1.9978401727861772) internal successors, (925), 463 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:05,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 925 transitions. [2021-07-09 17:54:05,776 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 925 transitions. Word has length 31 [2021-07-09 17:54:05,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:05,776 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 925 transitions. [2021-07-09 17:54:05,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:05,777 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 925 transitions. [2021-07-09 17:54:05,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:05,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:05,778 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:05,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:06,000 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:06,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:06,000 INFO L82 PathProgramCache]: Analyzing trace with hash -282568856, now seen corresponding path program 23 times [2021-07-09 17:54:06,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:06,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81402629] [2021-07-09 17:54:06,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:06,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:06,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81402629] [2021-07-09 17:54:06,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81402629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:06,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638659345] [2021-07-09 17:54:06,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:06,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:54:06,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:06,242 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:06,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:06,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:06,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:06,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:06,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:06,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:06,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:06,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:06,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:06,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:06,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:06,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:06,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:06,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:06,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:06,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:06,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:06,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:06,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:06,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:06,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:06,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638659345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:06,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:06,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-07-09 17:54:06,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492563469] [2021-07-09 17:54:06,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:54:06,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:06,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:54:06,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:06,622 INFO L87 Difference]: Start difference. First operand 464 states and 925 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:06,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:06,824 INFO L93 Difference]: Finished difference Result 925 states and 1897 transitions. [2021-07-09 17:54:06,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:54:06,824 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:06,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:06,827 INFO L225 Difference]: With dead ends: 925 [2021-07-09 17:54:06,827 INFO L226 Difference]: Without dead ends: 872 [2021-07-09 17:54:06,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 415.3ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:06,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-07-09 17:54:06,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 461. [2021-07-09 17:54:06,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.9978260869565216) internal successors, (919), 460 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:06,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 919 transitions. [2021-07-09 17:54:06,839 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 919 transitions. Word has length 31 [2021-07-09 17:54:06,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:06,839 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 919 transitions. [2021-07-09 17:54:06,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:06,840 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 919 transitions. [2021-07-09 17:54:06,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:06,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:06,841 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:07,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 17:54:07,054 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:07,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:07,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1619372270, now seen corresponding path program 24 times [2021-07-09 17:54:07,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:07,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935796488] [2021-07-09 17:54:07,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:07,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:07,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935796488] [2021-07-09 17:54:07,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935796488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:07,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919139347] [2021-07-09 17:54:07,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:07,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:54:07,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:07,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:07,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:07,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:07,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:07,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:07,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:07,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:07,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:07,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:07,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:07,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:07,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:07,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:07,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:07,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:07,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:07,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:07,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:07,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:07,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919139347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:07,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:07,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-07-09 17:54:07,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114553371] [2021-07-09 17:54:07,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:54:07,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:07,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:54:07,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:07,680 INFO L87 Difference]: Start difference. First operand 461 states and 919 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:07,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:07,938 INFO L93 Difference]: Finished difference Result 962 states and 1970 transitions. [2021-07-09 17:54:07,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:54:07,939 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:07,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:07,941 INFO L225 Difference]: With dead ends: 962 [2021-07-09 17:54:07,941 INFO L226 Difference]: Without dead ends: 906 [2021-07-09 17:54:07,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 458.0ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:07,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-07-09 17:54:07,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 458. [2021-07-09 17:54:07,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.9978118161925602) internal successors, (913), 457 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:07,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 913 transitions. [2021-07-09 17:54:07,952 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 913 transitions. Word has length 31 [2021-07-09 17:54:07,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:07,952 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 913 transitions. [2021-07-09 17:54:07,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:07,953 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 913 transitions. [2021-07-09 17:54:07,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:07,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:07,954 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:08,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:08,173 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:08,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:08,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1401997878, now seen corresponding path program 25 times [2021-07-09 17:54:08,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:08,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146152944] [2021-07-09 17:54:08,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:08,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:08,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146152944] [2021-07-09 17:54:08,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146152944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:08,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135889578] [2021-07-09 17:54:08,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:08,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:08,406 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:08,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:08,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:08,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:08,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:08,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:08,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:08,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:08,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:08,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:08,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:08,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:08,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:08,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:08,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:08,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:08,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:08,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:08,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:08,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135889578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:08,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:08,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-09 17:54:08,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789235184] [2021-07-09 17:54:08,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:54:08,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:08,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:54:08,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:08,784 INFO L87 Difference]: Start difference. First operand 458 states and 913 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:09,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:09,069 INFO L93 Difference]: Finished difference Result 936 states and 1914 transitions. [2021-07-09 17:54:09,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:54:09,069 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:09,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:09,071 INFO L225 Difference]: With dead ends: 936 [2021-07-09 17:54:09,071 INFO L226 Difference]: Without dead ends: 877 [2021-07-09 17:54:09,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 457.8ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:54:09,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-07-09 17:54:09,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 434. [2021-07-09 17:54:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.0115473441108547) internal successors, (871), 433 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:09,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 871 transitions. [2021-07-09 17:54:09,079 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 871 transitions. Word has length 31 [2021-07-09 17:54:09,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:09,080 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 871 transitions. [2021-07-09 17:54:09,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:09,080 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 871 transitions. [2021-07-09 17:54:09,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:09,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:09,081 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:09,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 17:54:09,293 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:09,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:09,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1874857228, now seen corresponding path program 26 times [2021-07-09 17:54:09,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:09,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891614189] [2021-07-09 17:54:09,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:09,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:09,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891614189] [2021-07-09 17:54:09,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891614189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:09,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578496115] [2021-07-09 17:54:09,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:09,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:09,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:09,538 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:09,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:09,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:09,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:09,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:09,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:09,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:09,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:09,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:09,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:09,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:09,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:09,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:09,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:09,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:09,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:09,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:09,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:09,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:09,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:09,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:09,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578496115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:09,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:09,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-09 17:54:09,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067837797] [2021-07-09 17:54:09,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:54:09,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:09,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:54:09,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:09,898 INFO L87 Difference]: Start difference. First operand 434 states and 871 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:10,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:10,155 INFO L93 Difference]: Finished difference Result 947 states and 1941 transitions. [2021-07-09 17:54:10,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:54:10,156 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:10,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:10,159 INFO L225 Difference]: With dead ends: 947 [2021-07-09 17:54:10,159 INFO L226 Difference]: Without dead ends: 905 [2021-07-09 17:54:10,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 433.1ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:54:10,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-07-09 17:54:10,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 431. [2021-07-09 17:54:10,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.0186046511627906) internal successors, (868), 430 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) [2021-07-09 17:54:10,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 868 transitions. [2021-07-09 17:54:10,169 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 868 transitions. Word has length 31 [2021-07-09 17:54:10,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:10,169 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 868 transitions. [2021-07-09 17:54:10,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:10,169 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 868 transitions. [2021-07-09 17:54:10,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:10,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:10,170 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:10,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:10,383 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:10,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:10,383 INFO L82 PathProgramCache]: Analyzing trace with hash 615761780, now seen corresponding path program 27 times [2021-07-09 17:54:10,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:10,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374953304] [2021-07-09 17:54:10,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:10,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:10,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374953304] [2021-07-09 17:54:10,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374953304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:10,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502149554] [2021-07-09 17:54:10,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:54:10,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:54:10,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:10,620 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:10,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:11,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:11,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:11,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:11,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:11,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:11,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:11,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:11,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:11,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:11,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:11,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:11,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:11,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 32 [2021-07-09 17:54:11,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:11,052 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-07-09 17:54:11,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:11,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:12 [2021-07-09 17:54:11,063 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:11,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502149554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:11,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:11,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-09 17:54:11,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50002006] [2021-07-09 17:54:11,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:54:11,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:11,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:54:11,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:11,064 INFO L87 Difference]: Start difference. First operand 431 states and 868 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:11,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:11,389 INFO L93 Difference]: Finished difference Result 780 states and 1574 transitions. [2021-07-09 17:54:11,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:54:11,390 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:11,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:11,392 INFO L225 Difference]: With dead ends: 780 [2021-07-09 17:54:11,392 INFO L226 Difference]: Without dead ends: 757 [2021-07-09 17:54:11,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 529.4ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:54:11,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-07-09 17:54:11,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 470. [2021-07-09 17:54:11,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.0042643923240937) internal successors, (940), 469 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:11,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 940 transitions. [2021-07-09 17:54:11,400 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 940 transitions. Word has length 31 [2021-07-09 17:54:11,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:11,400 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 940 transitions. [2021-07-09 17:54:11,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:11,400 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 940 transitions. [2021-07-09 17:54:11,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:11,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:11,401 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:11,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 17:54:11,623 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:11,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:11,624 INFO L82 PathProgramCache]: Analyzing trace with hash 833136172, now seen corresponding path program 28 times [2021-07-09 17:54:11,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:11,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338326039] [2021-07-09 17:54:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:11,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:11,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338326039] [2021-07-09 17:54:11,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338326039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:11,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801238468] [2021-07-09 17:54:11,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:11,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:54:11,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:11,872 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:11,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:12,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:12,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:12,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:12,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:12,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:12,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:12,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:12,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:12,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:12,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:12,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:12,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:12,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:12,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:12,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:12,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:12,216 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:12,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801238468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:12,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:12,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-09 17:54:12,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100335369] [2021-07-09 17:54:12,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:54:12,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:12,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:54:12,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:12,235 INFO L87 Difference]: Start difference. First operand 470 states and 940 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:12,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:12,561 INFO L93 Difference]: Finished difference Result 833 states and 1680 transitions. [2021-07-09 17:54:12,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:54:12,561 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:12,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:12,564 INFO L225 Difference]: With dead ends: 833 [2021-07-09 17:54:12,564 INFO L226 Difference]: Without dead ends: 812 [2021-07-09 17:54:12,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 462.9ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:54:12,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-07-09 17:54:12,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 470. [2021-07-09 17:54:12,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.0042643923240937) internal successors, (940), 469 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:12,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 940 transitions. [2021-07-09 17:54:12,573 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 940 transitions. Word has length 31 [2021-07-09 17:54:12,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:12,574 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 940 transitions. [2021-07-09 17:54:12,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:12,574 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 940 transitions. [2021-07-09 17:54:12,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:12,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:12,575 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:12,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:12,797 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:12,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:12,797 INFO L82 PathProgramCache]: Analyzing trace with hash -167653016, now seen corresponding path program 29 times [2021-07-09 17:54:12,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:12,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584338138] [2021-07-09 17:54:12,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:13,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:13,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584338138] [2021-07-09 17:54:13,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584338138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:13,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743486013] [2021-07-09 17:54:13,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:13,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:54:13,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:13,026 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:13,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:13,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:13,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:13,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:13,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:13,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:13,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:13,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:13,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:13,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:13,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:13,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:13,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:13,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:13,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:13,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:13,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 32 [2021-07-09 17:54:13,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:13,432 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-07-09 17:54:13,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:13,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:12 [2021-07-09 17:54:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:13,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743486013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:13,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:13,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-07-09 17:54:13,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29419194] [2021-07-09 17:54:13,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:54:13,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:13,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:54:13,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:13,446 INFO L87 Difference]: Start difference. First operand 470 states and 940 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:13,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:13,865 INFO L93 Difference]: Finished difference Result 1001 states and 2003 transitions. [2021-07-09 17:54:13,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:54:13,865 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:13,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:13,868 INFO L225 Difference]: With dead ends: 1001 [2021-07-09 17:54:13,868 INFO L226 Difference]: Without dead ends: 828 [2021-07-09 17:54:13,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 611.2ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:54:13,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-07-09 17:54:13,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 512. [2021-07-09 17:54:13,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.9921722113502935) internal successors, (1018), 511 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) [2021-07-09 17:54:13,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1018 transitions. [2021-07-09 17:54:13,876 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1018 transitions. Word has length 31 [2021-07-09 17:54:13,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:13,876 INFO L482 AbstractCegarLoop]: Abstraction has 512 states and 1018 transitions. [2021-07-09 17:54:13,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:13,876 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1018 transitions. [2021-07-09 17:54:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:13,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:13,877 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:14,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 17:54:14,097 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:14,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:14,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1642134986, now seen corresponding path program 30 times [2021-07-09 17:54:14,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:14,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799255395] [2021-07-09 17:54:14,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:14,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:14,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799255395] [2021-07-09 17:54:14,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799255395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:14,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907954471] [2021-07-09 17:54:14,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:14,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:54:14,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:14,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:14,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:14,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:14,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:14,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:14,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:14,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:14,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:14,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:14,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:14,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:14,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:14,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:14,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:14,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:14,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:14,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:14,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:14,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:14,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:14,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:14,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907954471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:14,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:14,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-07-09 17:54:14,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941964048] [2021-07-09 17:54:14,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:54:14,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:14,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:54:14,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:14,648 INFO L87 Difference]: Start difference. First operand 512 states and 1018 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:14,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:14,896 INFO L93 Difference]: Finished difference Result 1117 states and 2272 transitions. [2021-07-09 17:54:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:54:14,896 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:14,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:14,899 INFO L225 Difference]: With dead ends: 1117 [2021-07-09 17:54:14,901 INFO L226 Difference]: Without dead ends: 1061 [2021-07-09 17:54:14,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 403.3ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:14,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-07-09 17:54:14,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 539. [2021-07-09 17:54:14,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.986988847583643) internal successors, (1069), 538 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1069 transitions. [2021-07-09 17:54:14,912 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1069 transitions. Word has length 31 [2021-07-09 17:54:14,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:14,912 INFO L482 AbstractCegarLoop]: Abstraction has 539 states and 1069 transitions. [2021-07-09 17:54:14,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:14,912 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1069 transitions. [2021-07-09 17:54:14,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:14,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:14,913 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:15,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 17:54:15,129 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:15,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:15,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1859509378, now seen corresponding path program 31 times [2021-07-09 17:54:15,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:15,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017198589] [2021-07-09 17:54:15,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:15,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:15,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017198589] [2021-07-09 17:54:15,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017198589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:15,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945030094] [2021-07-09 17:54:15,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:15,373 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:15,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:15,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:15,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:15,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:15,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:15,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:15,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:15,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:15,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:15,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:15,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:15,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:15,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:15,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:15,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:15,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:15,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:15,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:15,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:15,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945030094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:15,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:15,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-09 17:54:15,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721390810] [2021-07-09 17:54:15,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:54:15,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:15,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:54:15,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:15,738 INFO L87 Difference]: Start difference. First operand 539 states and 1069 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:15,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:15,995 INFO L93 Difference]: Finished difference Result 1088 states and 2213 transitions. [2021-07-09 17:54:15,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:54:15,995 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:15,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:15,998 INFO L225 Difference]: With dead ends: 1088 [2021-07-09 17:54:15,998 INFO L226 Difference]: Without dead ends: 1029 [2021-07-09 17:54:15,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 459.2ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:54:15,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-07-09 17:54:16,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 536. [2021-07-09 17:54:16,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.9869158878504674) internal successors, (1063), 535 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:16,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1063 transitions. [2021-07-09 17:54:16,007 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1063 transitions. Word has length 31 [2021-07-09 17:54:16,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:16,007 INFO L482 AbstractCegarLoop]: Abstraction has 536 states and 1063 transitions. [2021-07-09 17:54:16,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:16,007 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1063 transitions. [2021-07-09 17:54:16,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:16,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:16,009 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:16,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 17:54:16,231 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:16,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:16,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1386650028, now seen corresponding path program 32 times [2021-07-09 17:54:16,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:16,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734626827] [2021-07-09 17:54:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:16,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:16,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734626827] [2021-07-09 17:54:16,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734626827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:16,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711264351] [2021-07-09 17:54:16,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:16,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:16,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:16,462 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:16,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:16,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:16,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:16,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:16,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:16,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:16,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:16,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:16,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:16,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:16,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:16,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:16,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:16,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:16,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:16,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:16,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:16,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:16,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711264351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:16,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:16,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-09 17:54:16,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069330076] [2021-07-09 17:54:16,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:54:16,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:16,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:54:16,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:16,855 INFO L87 Difference]: Start difference. First operand 536 states and 1063 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:17,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:17,098 INFO L93 Difference]: Finished difference Result 1059 states and 2151 transitions. [2021-07-09 17:54:17,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:54:17,099 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:17,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:17,101 INFO L225 Difference]: With dead ends: 1059 [2021-07-09 17:54:17,101 INFO L226 Difference]: Without dead ends: 1017 [2021-07-09 17:54:17,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 442.5ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:54:17,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-07-09 17:54:17,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 533. [2021-07-09 17:54:17,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 1.986842105263158) internal successors, (1057), 532 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:17,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1057 transitions. [2021-07-09 17:54:17,109 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1057 transitions. Word has length 31 [2021-07-09 17:54:17,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:17,110 INFO L482 AbstractCegarLoop]: Abstraction has 533 states and 1057 transitions. [2021-07-09 17:54:17,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:17,110 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1057 transitions. [2021-07-09 17:54:17,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:17,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:17,111 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:17,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 17:54:17,313 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:17,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1919082992, now seen corresponding path program 33 times [2021-07-09 17:54:17,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:17,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762655957] [2021-07-09 17:54:17,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:17,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:17,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762655957] [2021-07-09 17:54:17,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762655957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:17,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527756481] [2021-07-09 17:54:17,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:17,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:54:17,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:17,526 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:17,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:17,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:17,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:17,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:17,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:17,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:17,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:17,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:17,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:17,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:17,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:17,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:17,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:17,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:17,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:17,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:17,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:17,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:17,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527756481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:17,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:17,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-07-09 17:54:17,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316001195] [2021-07-09 17:54:17,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:54:17,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:17,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:54:17,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:17,890 INFO L87 Difference]: Start difference. First operand 533 states and 1057 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:18,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:18,024 INFO L93 Difference]: Finished difference Result 1026 states and 2079 transitions. [2021-07-09 17:54:18,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:54:18,024 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:18,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:18,027 INFO L225 Difference]: With dead ends: 1026 [2021-07-09 17:54:18,027 INFO L226 Difference]: Without dead ends: 938 [2021-07-09 17:54:18,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 401.5ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:18,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-07-09 17:54:18,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 575. [2021-07-09 17:54:18,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.9825783972125435) internal successors, (1138), 574 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:18,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1138 transitions. [2021-07-09 17:54:18,037 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1138 transitions. Word has length 31 [2021-07-09 17:54:18,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:18,037 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1138 transitions. [2021-07-09 17:54:18,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:18,037 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1138 transitions. [2021-07-09 17:54:18,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:18,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:18,039 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:18,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 17:54:18,261 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:18,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:18,261 INFO L82 PathProgramCache]: Analyzing trace with hash -566096302, now seen corresponding path program 34 times [2021-07-09 17:54:18,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:18,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870611778] [2021-07-09 17:54:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:18,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:18,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870611778] [2021-07-09 17:54:18,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870611778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:18,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912545919] [2021-07-09 17:54:18,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:18,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:54:18,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:18,475 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:18,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:18,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:18,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:18,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:18,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:18,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:18,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:18,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:18,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:18,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:18,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:18,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:18,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:18,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:18,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:18,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:18,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:18,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:18,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:18,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:18,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912545919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:18,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:18,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-07-09 17:54:18,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22912324] [2021-07-09 17:54:18,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:54:18,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:18,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:54:18,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:18,886 INFO L87 Difference]: Start difference. First operand 575 states and 1138 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:19,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:19,109 INFO L93 Difference]: Finished difference Result 1110 states and 2251 transitions. [2021-07-09 17:54:19,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:54:19,109 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:19,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:19,113 INFO L225 Difference]: With dead ends: 1110 [2021-07-09 17:54:19,113 INFO L226 Difference]: Without dead ends: 1057 [2021-07-09 17:54:19,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 443.8ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:19,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-07-09 17:54:19,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 563. [2021-07-09 17:54:19,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.9822064056939501) internal successors, (1114), 562 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:19,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1114 transitions. [2021-07-09 17:54:19,123 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1114 transitions. Word has length 31 [2021-07-09 17:54:19,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:19,123 INFO L482 AbstractCegarLoop]: Abstraction has 563 states and 1114 transitions. [2021-07-09 17:54:19,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:19,123 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1114 transitions. [2021-07-09 17:54:19,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:19,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:19,124 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:19,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 17:54:19,329 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:19,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:19,329 INFO L82 PathProgramCache]: Analyzing trace with hash -348721910, now seen corresponding path program 35 times [2021-07-09 17:54:19,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:19,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988781543] [2021-07-09 17:54:19,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:19,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:19,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988781543] [2021-07-09 17:54:19,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988781543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:19,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256395014] [2021-07-09 17:54:19,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:19,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:54:19,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:19,580 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 17:54:19,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:19,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:19,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:19,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:19,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:19,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:19,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:19,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:19,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:19,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:19,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:19,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:19,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:19,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:19,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:19,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:19,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:19,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 26 [2021-07-09 17:54:19,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:19,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:19,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:19,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:9 [2021-07-09 17:54:19,979 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:19,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256395014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:19,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:19,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-07-09 17:54:19,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256812302] [2021-07-09 17:54:19,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:54:19,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:19,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:54:19,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:54:19,980 INFO L87 Difference]: Start difference. First operand 563 states and 1114 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:20,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:20,923 INFO L93 Difference]: Finished difference Result 1236 states and 2487 transitions. [2021-07-09 17:54:20,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:54:20,924 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:20,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:20,926 INFO L225 Difference]: With dead ends: 1236 [2021-07-09 17:54:20,926 INFO L226 Difference]: Without dead ends: 1116 [2021-07-09 17:54:20,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1008.6ms TimeCoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:54:20,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-07-09 17:54:20,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 578. [2021-07-09 17:54:20,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 1.977469670710572) internal successors, (1141), 577 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1141 transitions. [2021-07-09 17:54:20,937 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1141 transitions. Word has length 31 [2021-07-09 17:54:20,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:20,937 INFO L482 AbstractCegarLoop]: Abstraction has 578 states and 1141 transitions. [2021-07-09 17:54:20,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:20,937 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1141 transitions. [2021-07-09 17:54:20,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:20,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:20,939 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:21,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-09 17:54:21,161 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:21,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:21,161 INFO L82 PathProgramCache]: Analyzing trace with hash -821581260, now seen corresponding path program 36 times [2021-07-09 17:54:21,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:21,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688264947] [2021-07-09 17:54:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:21,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:21,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688264947] [2021-07-09 17:54:21,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688264947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:21,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921785103] [2021-07-09 17:54:21,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:21,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:54:21,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:21,438 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:54:21,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:21,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:21,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:21,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:21,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:21,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:21,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:21,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:21,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:21,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:21,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:21,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:21,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:21,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:21,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:21,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:21,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:21,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:21,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:21,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:21,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921785103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:21,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:21,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-09 17:54:21,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840193882] [2021-07-09 17:54:21,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:54:21,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:21,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:54:21,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:21,815 INFO L87 Difference]: Start difference. First operand 578 states and 1141 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:22,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:22,061 INFO L93 Difference]: Finished difference Result 1207 states and 2430 transitions. [2021-07-09 17:54:22,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:54:22,061 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:22,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:22,063 INFO L225 Difference]: With dead ends: 1207 [2021-07-09 17:54:22,063 INFO L226 Difference]: Without dead ends: 1075 [2021-07-09 17:54:22,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 482.5ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:54:22,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-07-09 17:54:22,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 614. [2021-07-09 17:54:22,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 1.9804241435562806) internal successors, (1214), 613 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1214 transitions. [2021-07-09 17:54:22,074 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1214 transitions. Word has length 31 [2021-07-09 17:54:22,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:22,074 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1214 transitions. [2021-07-09 17:54:22,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:22,074 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1214 transitions. [2021-07-09 17:54:22,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:22,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:22,075 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:22,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:22,297 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:22,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:22,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1916779244, now seen corresponding path program 37 times [2021-07-09 17:54:22,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:22,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224856606] [2021-07-09 17:54:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:22,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:22,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224856606] [2021-07-09 17:54:22,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224856606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:22,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000254943] [2021-07-09 17:54:22,538 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 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 [2021-07-09 17:54:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:22,566 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:22,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:22,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:22,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:22,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:22,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:22,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:22,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:22,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:22,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:22,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:22,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:22,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:22,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:22,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:22,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:22,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:22,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:22,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:22,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:22,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:23,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000254943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:23,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:23,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-09 17:54:23,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683202] [2021-07-09 17:54:23,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:54:23,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:23,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:54:23,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:23,010 INFO L87 Difference]: Start difference. First operand 614 states and 1214 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:23,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:23,243 INFO L93 Difference]: Finished difference Result 1033 states and 2073 transitions. [2021-07-09 17:54:23,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:54:23,243 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:23,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:23,245 INFO L225 Difference]: With dead ends: 1033 [2021-07-09 17:54:23,245 INFO L226 Difference]: Without dead ends: 1010 [2021-07-09 17:54:23,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 527.9ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:23,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-07-09 17:54:23,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 624. [2021-07-09 17:54:23,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 1.9823434991974318) internal successors, (1235), 623 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:23,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1235 transitions. [2021-07-09 17:54:23,255 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1235 transitions. Word has length 31 [2021-07-09 17:54:23,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:23,255 INFO L482 AbstractCegarLoop]: Abstraction has 624 states and 1235 transitions. [2021-07-09 17:54:23,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:23,255 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1235 transitions. [2021-07-09 17:54:23,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:23,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:23,256 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:23,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:23,469 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:23,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:23,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1512927684, now seen corresponding path program 38 times [2021-07-09 17:54:23,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:23,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252252550] [2021-07-09 17:54:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:23,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:23,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252252550] [2021-07-09 17:54:23,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252252550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:23,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128073829] [2021-07-09 17:54:23,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:23,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:23,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:23,717 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:23,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:24,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:24,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:24,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:24,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:24,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:24,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:24,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:24,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:24,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:24,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:24,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:24,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:24,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:24,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:24,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128073829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:24,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:24,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-07-09 17:54:24,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767441949] [2021-07-09 17:54:24,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:54:24,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:24,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:54:24,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:24,033 INFO L87 Difference]: Start difference. First operand 624 states and 1235 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:24,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:24,307 INFO L93 Difference]: Finished difference Result 1316 states and 2627 transitions. [2021-07-09 17:54:24,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:54:24,307 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:24,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:24,309 INFO L225 Difference]: With dead ends: 1316 [2021-07-09 17:54:24,309 INFO L226 Difference]: Without dead ends: 1163 [2021-07-09 17:54:24,309 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 484.5ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:54:24,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-07-09 17:54:24,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 717. [2021-07-09 17:54:24,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 1.9594972067039107) internal successors, (1403), 716 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:24,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1403 transitions. [2021-07-09 17:54:24,319 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1403 transitions. Word has length 31 [2021-07-09 17:54:24,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:24,319 INFO L482 AbstractCegarLoop]: Abstraction has 717 states and 1403 transitions. [2021-07-09 17:54:24,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:24,319 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1403 transitions. [2021-07-09 17:54:24,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:24,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:24,321 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:24,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:24,535 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:24,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:24,535 INFO L82 PathProgramCache]: Analyzing trace with hash 514234710, now seen corresponding path program 39 times [2021-07-09 17:54:24,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:24,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771493946] [2021-07-09 17:54:24,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:24,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:24,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771493946] [2021-07-09 17:54:24,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771493946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:24,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178166025] [2021-07-09 17:54:24,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:24,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:54:24,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:24,748 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:24,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:25,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:25,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:25,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:25,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:25,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:25,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:25,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:25,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:25,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:25,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:25,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:25,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:25,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:25,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:25,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178166025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:25,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:25,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-07-09 17:54:25,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521926549] [2021-07-09 17:54:25,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:54:25,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:25,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:54:25,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:25,071 INFO L87 Difference]: Start difference. First operand 717 states and 1403 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:25,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:25,372 INFO L93 Difference]: Finished difference Result 1252 states and 2517 transitions. [2021-07-09 17:54:25,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:54:25,373 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:25,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:25,375 INFO L225 Difference]: With dead ends: 1252 [2021-07-09 17:54:25,375 INFO L226 Difference]: Without dead ends: 1197 [2021-07-09 17:54:25,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 418.8ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:54:25,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-07-09 17:54:25,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 762. [2021-07-09 17:54:25,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 1.9540078843626807) internal successors, (1487), 761 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:25,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1487 transitions. [2021-07-09 17:54:25,384 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1487 transitions. Word has length 31 [2021-07-09 17:54:25,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:25,385 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 1487 transitions. [2021-07-09 17:54:25,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:25,385 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1487 transitions. [2021-07-09 17:54:25,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:25,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:25,386 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:25,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-09 17:54:25,605 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:25,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:25,605 INFO L82 PathProgramCache]: Analyzing trace with hash -486554478, now seen corresponding path program 40 times [2021-07-09 17:54:25,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:25,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99846070] [2021-07-09 17:54:25,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:25,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:25,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99846070] [2021-07-09 17:54:25,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99846070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:25,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123898574] [2021-07-09 17:54:25,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:25,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:54:25,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:25,823 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:25,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:26,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:26,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:26,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:26,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:26,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:26,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:26,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:26,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:26,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:26,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:26,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:26,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:26,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:26,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:26,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:26,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:26,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:26,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:26,119 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:26,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123898574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:26,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:26,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-07-09 17:54:26,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926109211] [2021-07-09 17:54:26,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:54:26,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:26,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:54:26,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:26,120 INFO L87 Difference]: Start difference. First operand 762 states and 1487 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:26,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:26,488 INFO L93 Difference]: Finished difference Result 1353 states and 2677 transitions. [2021-07-09 17:54:26,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:54:26,488 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:26,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:26,490 INFO L225 Difference]: With dead ends: 1353 [2021-07-09 17:54:26,490 INFO L226 Difference]: Without dead ends: 1168 [2021-07-09 17:54:26,490 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 473.2ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:54:26,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-07-09 17:54:26,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 678. [2021-07-09 17:54:26,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 1.9748892171344166) internal successors, (1337), 677 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:26,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1337 transitions. [2021-07-09 17:54:26,502 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1337 transitions. Word has length 31 [2021-07-09 17:54:26,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:26,502 INFO L482 AbstractCegarLoop]: Abstraction has 678 states and 1337 transitions. [2021-07-09 17:54:26,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:26,503 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1337 transitions. [2021-07-09 17:54:26,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:26,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:26,504 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:26,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:26,726 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:26,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:26,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1540607916, now seen corresponding path program 41 times [2021-07-09 17:54:26,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:26,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98827228] [2021-07-09 17:54:26,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:26,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:26,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98827228] [2021-07-09 17:54:26,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98827228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:26,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294870434] [2021-07-09 17:54:26,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:26,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:54:26,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:26,973 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:26,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:27,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:27,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:27,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:27,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:27,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:27,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:27,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:27,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:27,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:27,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:27,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:27,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:27,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:27,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:27,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:27,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:27,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294870434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:27,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:27,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-07-09 17:54:27,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712378699] [2021-07-09 17:54:27,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:54:27,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:27,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:54:27,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:27,332 INFO L87 Difference]: Start difference. First operand 678 states and 1337 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:27,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:27,564 INFO L93 Difference]: Finished difference Result 1283 states and 2599 transitions. [2021-07-09 17:54:27,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:54:27,564 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:27,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:27,566 INFO L225 Difference]: With dead ends: 1283 [2021-07-09 17:54:27,566 INFO L226 Difference]: Without dead ends: 1224 [2021-07-09 17:54:27,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 443.0ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:27,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-07-09 17:54:27,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 681. [2021-07-09 17:54:27,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.975) internal successors, (1343), 680 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:27,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1343 transitions. [2021-07-09 17:54:27,574 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1343 transitions. Word has length 31 [2021-07-09 17:54:27,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:27,574 INFO L482 AbstractCegarLoop]: Abstraction has 681 states and 1343 transitions. [2021-07-09 17:54:27,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:27,574 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1343 transitions. [2021-07-09 17:54:27,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:27,576 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:27,576 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:27,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:27,789 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:27,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:27,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1067748566, now seen corresponding path program 42 times [2021-07-09 17:54:27,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:27,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247750465] [2021-07-09 17:54:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:28,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:28,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247750465] [2021-07-09 17:54:28,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247750465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:28,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837744709] [2021-07-09 17:54:28,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:28,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:54:28,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:28,051 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:28,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:28,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:28,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:28,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:28,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:28,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:28,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:28,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:28,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:28,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:28,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:28,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:28,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:28,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:28,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:28,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:28,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:28,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:28,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837744709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:28,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:28,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-07-09 17:54:28,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919163280] [2021-07-09 17:54:28,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:54:28,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:28,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:54:28,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:28,381 INFO L87 Difference]: Start difference. First operand 681 states and 1343 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:28,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:28,636 INFO L93 Difference]: Finished difference Result 1174 states and 2374 transitions. [2021-07-09 17:54:28,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:54:28,636 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:28,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:28,639 INFO L225 Difference]: With dead ends: 1174 [2021-07-09 17:54:28,639 INFO L226 Difference]: Without dead ends: 1132 [2021-07-09 17:54:28,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 438.4ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:28,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-07-09 17:54:28,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 684. [2021-07-09 17:54:28,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 1.9751098096632504) internal successors, (1349), 683 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:28,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1349 transitions. [2021-07-09 17:54:28,650 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1349 transitions. Word has length 31 [2021-07-09 17:54:28,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:28,650 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1349 transitions. [2021-07-09 17:54:28,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:28,650 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1349 transitions. [2021-07-09 17:54:28,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:28,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:28,651 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:28,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 17:54:28,869 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:28,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:28,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1600181530, now seen corresponding path program 43 times [2021-07-09 17:54:28,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:28,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130489436] [2021-07-09 17:54:28,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:29,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:29,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130489436] [2021-07-09 17:54:29,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130489436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:29,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209551263] [2021-07-09 17:54:29,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:54:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:29,119 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:29,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:29,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:29,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:29,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:29,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:29,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:29,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:29,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:29,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:29,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:29,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:29,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:29,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:29,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:29,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:29,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:29,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:29,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:29,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:29,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209551263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:29,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:29,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-07-09 17:54:29,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15154026] [2021-07-09 17:54:29,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:54:29,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:29,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:54:29,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:29,415 INFO L87 Difference]: Start difference. First operand 684 states and 1349 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:29,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:29,712 INFO L93 Difference]: Finished difference Result 1381 states and 2772 transitions. [2021-07-09 17:54:29,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:54:29,712 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:29,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:29,715 INFO L225 Difference]: With dead ends: 1381 [2021-07-09 17:54:29,715 INFO L226 Difference]: Without dead ends: 1277 [2021-07-09 17:54:29,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:29,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-07-09 17:54:29,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 759. [2021-07-09 17:54:29,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 1.9736147757255937) internal successors, (1496), 758 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1496 transitions. [2021-07-09 17:54:29,728 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1496 transitions. Word has length 31 [2021-07-09 17:54:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:29,728 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 1496 transitions. [2021-07-09 17:54:29,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1496 transitions. [2021-07-09 17:54:29,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:29,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:29,729 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:29,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 17:54:29,952 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:29,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:29,952 INFO L82 PathProgramCache]: Analyzing trace with hash -667623372, now seen corresponding path program 44 times [2021-07-09 17:54:29,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:29,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139936568] [2021-07-09 17:54:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:30,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:30,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139936568] [2021-07-09 17:54:30,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139936568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:30,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247259168] [2021-07-09 17:54:30,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:30,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:30,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:30,214 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:30,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:30,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:30,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:30,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:30,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:30,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:30,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:30,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:30,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:30,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:30,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:30,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:30,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:30,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:30,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:30,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:30,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247259168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:30,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:30,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-07-09 17:54:30,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196252254] [2021-07-09 17:54:30,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:54:30,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:30,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:54:30,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:30,625 INFO L87 Difference]: Start difference. First operand 759 states and 1496 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:30,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:30,873 INFO L93 Difference]: Finished difference Result 1359 states and 2747 transitions. [2021-07-09 17:54:30,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:54:30,874 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:30,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:30,876 INFO L225 Difference]: With dead ends: 1359 [2021-07-09 17:54:30,876 INFO L226 Difference]: Without dead ends: 1304 [2021-07-09 17:54:30,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 485.7ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:30,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-07-09 17:54:30,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 774. [2021-07-09 17:54:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 1.9741267787839587) internal successors, (1526), 773 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:30,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1526 transitions. [2021-07-09 17:54:30,889 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1526 transitions. Word has length 31 [2021-07-09 17:54:30,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:30,889 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1526 transitions. [2021-07-09 17:54:30,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:30,890 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1526 transitions. [2021-07-09 17:54:30,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:30,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:30,891 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:31,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 17:54:31,113 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:31,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:31,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1140482722, now seen corresponding path program 45 times [2021-07-09 17:54:31,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:31,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139359240] [2021-07-09 17:54:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:31,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:31,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139359240] [2021-07-09 17:54:31,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139359240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:31,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571772218] [2021-07-09 17:54:31,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:31,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:54:31,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:31,370 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:31,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:31,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:31,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:31,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:31,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:31,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:31,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:31,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:31,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:31,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:31,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:31,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:31,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:31,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:31,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:31,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571772218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:31,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:31,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-07-09 17:54:31,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085248256] [2021-07-09 17:54:31,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:54:31,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:31,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:54:31,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:31,764 INFO L87 Difference]: Start difference. First operand 774 states and 1526 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:32,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:32,053 INFO L93 Difference]: Finished difference Result 1116 states and 2233 transitions. [2021-07-09 17:54:32,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:54:32,054 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:32,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:32,056 INFO L225 Difference]: With dead ends: 1116 [2021-07-09 17:54:32,056 INFO L226 Difference]: Without dead ends: 1094 [2021-07-09 17:54:32,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 478.3ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:32,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-07-09 17:54:32,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 774. [2021-07-09 17:54:32,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 1.9741267787839587) internal successors, (1526), 773 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:32,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1526 transitions. [2021-07-09 17:54:32,074 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1526 transitions. Word has length 31 [2021-07-09 17:54:32,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:32,074 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1526 transitions. [2021-07-09 17:54:32,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:32,075 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1526 transitions. [2021-07-09 17:54:32,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:32,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:32,076 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:32,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:32,293 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:32,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:32,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1597877782, now seen corresponding path program 46 times [2021-07-09 17:54:32,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:32,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278966816] [2021-07-09 17:54:32,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:32,477 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:32,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:32,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278966816] [2021-07-09 17:54:32,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278966816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:32,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424815916] [2021-07-09 17:54:32,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:32,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:54:32,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:32,501 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:32,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:32,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:32,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:32,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:32,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:32,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:32,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:32,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:32,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:32,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:32,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:32,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:32,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:32,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:32,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:32,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424815916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:32,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:32,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-07-09 17:54:32,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122482571] [2021-07-09 17:54:32,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:54:32,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:32,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:54:32,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:32,855 INFO L87 Difference]: Start difference. First operand 774 states and 1526 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:33,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:33,247 INFO L93 Difference]: Finished difference Result 1127 states and 2256 transitions. [2021-07-09 17:54:33,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:54:33,247 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:33,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:33,250 INFO L225 Difference]: With dead ends: 1127 [2021-07-09 17:54:33,250 INFO L226 Difference]: Without dead ends: 1104 [2021-07-09 17:54:33,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 395.2ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:33,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-07-09 17:54:33,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 774. [2021-07-09 17:54:33,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 1.9741267787839587) internal successors, (1526), 773 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1526 transitions. [2021-07-09 17:54:33,260 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1526 transitions. Word has length 31 [2021-07-09 17:54:33,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:33,261 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1526 transitions. [2021-07-09 17:54:33,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:33,261 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1526 transitions. [2021-07-09 17:54:33,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:33,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:33,262 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:33,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:33,484 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:33,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:33,485 INFO L82 PathProgramCache]: Analyzing trace with hash 102354416, now seen corresponding path program 47 times [2021-07-09 17:54:33,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:33,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676082850] [2021-07-09 17:54:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:33,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:33,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676082850] [2021-07-09 17:54:33,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676082850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:33,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512066863] [2021-07-09 17:54:33,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:33,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:54:33,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:33,766 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:33,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:34,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:34,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:34,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:34,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:34,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:34,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:34,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:34,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:34,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:34,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:34,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:34,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:34,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:34,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512066863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:34,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:34,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-07-09 17:54:34,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841649593] [2021-07-09 17:54:34,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:54:34,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:34,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:54:34,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:54:34,093 INFO L87 Difference]: Start difference. First operand 774 states and 1526 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:34,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:34,338 INFO L93 Difference]: Finished difference Result 1217 states and 2444 transitions. [2021-07-09 17:54:34,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:54:34,338 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:34,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:34,341 INFO L225 Difference]: With dead ends: 1217 [2021-07-09 17:54:34,341 INFO L226 Difference]: Without dead ends: 1113 [2021-07-09 17:54:34,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 445.9ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:54:34,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-07-09 17:54:34,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 801. [2021-07-09 17:54:34,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 1.98125) internal successors, (1585), 800 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:34,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1585 transitions. [2021-07-09 17:54:34,352 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1585 transitions. Word has length 31 [2021-07-09 17:54:34,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:34,353 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 1585 transitions. [2021-07-09 17:54:34,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:34,353 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1585 transitions. [2021-07-09 17:54:34,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:34,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:34,354 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:34,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-09 17:54:34,576 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:34,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:34,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1046021464, now seen corresponding path program 48 times [2021-07-09 17:54:34,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:34,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193985191] [2021-07-09 17:54:34,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:34,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:34,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193985191] [2021-07-09 17:54:34,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193985191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:34,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45965092] [2021-07-09 17:54:34,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:34,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:54:34,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:34,829 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:34,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:35,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:35,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:35,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:35,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:35,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:35,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:35,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:35,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:35,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:35,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:35,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:35,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:35,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:35,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45965092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:35,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:35,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-07-09 17:54:35,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234902007] [2021-07-09 17:54:35,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:54:35,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:35,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:54:35,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:54:35,164 INFO L87 Difference]: Start difference. First operand 801 states and 1585 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:35,402 INFO L93 Difference]: Finished difference Result 1401 states and 2833 transitions. [2021-07-09 17:54:35,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:54:35,403 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:35,405 INFO L225 Difference]: With dead ends: 1401 [2021-07-09 17:54:35,405 INFO L226 Difference]: Without dead ends: 1344 [2021-07-09 17:54:35,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 434.1ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:54:35,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-07-09 17:54:35,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 795. [2021-07-09 17:54:35,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 1.978589420654912) internal successors, (1571), 794 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:35,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1571 transitions. [2021-07-09 17:54:35,418 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1571 transitions. Word has length 31 [2021-07-09 17:54:35,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:35,418 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 1571 transitions. [2021-07-09 17:54:35,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:35,418 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1571 transitions. [2021-07-09 17:54:35,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:35,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:35,424 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:35,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:35,648 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:35,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:35,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2129516810, now seen corresponding path program 49 times [2021-07-09 17:54:35,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:35,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2356967] [2021-07-09 17:54:35,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:35,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:35,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2356967] [2021-07-09 17:54:35,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2356967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:35,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651906904] [2021-07-09 17:54:35,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:35,917 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:35,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:36,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:36,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:36,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:36,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:36,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:36,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:36,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:36,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:36,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:36,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:36,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:36,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:36,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:36,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:36,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:36,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651906904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:36,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:36,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-07-09 17:54:36,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000966957] [2021-07-09 17:54:36,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:54:36,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:36,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:54:36,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:36,214 INFO L87 Difference]: Start difference. First operand 795 states and 1571 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:36,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:36,472 INFO L93 Difference]: Finished difference Result 1359 states and 2744 transitions. [2021-07-09 17:54:36,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:54:36,472 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:36,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:36,473 INFO L225 Difference]: With dead ends: 1359 [2021-07-09 17:54:36,474 INFO L226 Difference]: Without dead ends: 1304 [2021-07-09 17:54:36,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 415.1ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:36,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-07-09 17:54:36,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 783. [2021-07-09 17:54:36,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 1.9782608695652173) internal successors, (1547), 782 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:36,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1547 transitions. [2021-07-09 17:54:36,482 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1547 transitions. Word has length 31 [2021-07-09 17:54:36,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:36,484 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 1547 transitions. [2021-07-09 17:54:36,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:36,484 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1547 transitions. [2021-07-09 17:54:36,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:36,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:36,485 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:36,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-09 17:54:36,694 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:36,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:36,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1656657460, now seen corresponding path program 50 times [2021-07-09 17:54:36,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:36,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501000956] [2021-07-09 17:54:36,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:36,905 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:36,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:36,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501000956] [2021-07-09 17:54:36,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501000956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:36,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750942230] [2021-07-09 17:54:36,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:36,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:36,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:36,939 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:36,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:37,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:37,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:37,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:37,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:37,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:37,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:37,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:37,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:37,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:37,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:37,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:37,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:37,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:37,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750942230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:37,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:37,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-07-09 17:54:37,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703586695] [2021-07-09 17:54:37,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:54:37,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:37,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:54:37,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:37,243 INFO L87 Difference]: Start difference. First operand 783 states and 1547 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:37,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:37,494 INFO L93 Difference]: Finished difference Result 1153 states and 2311 transitions. [2021-07-09 17:54:37,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:54:37,495 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:37,497 INFO L225 Difference]: With dead ends: 1153 [2021-07-09 17:54:37,497 INFO L226 Difference]: Without dead ends: 1131 [2021-07-09 17:54:37,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 388.0ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:37,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-07-09 17:54:37,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 783. [2021-07-09 17:54:37,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 1.9782608695652173) internal successors, (1547), 782 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:37,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1547 transitions. [2021-07-09 17:54:37,509 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1547 transitions. Word has length 31 [2021-07-09 17:54:37,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:37,509 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 1547 transitions. [2021-07-09 17:54:37,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:37,509 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1547 transitions. [2021-07-09 17:54:37,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:37,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:37,510 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:37,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 17:54:37,733 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:37,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:37,733 INFO L82 PathProgramCache]: Analyzing trace with hash 100050668, now seen corresponding path program 51 times [2021-07-09 17:54:37,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:37,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479170652] [2021-07-09 17:54:37,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:37,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:37,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479170652] [2021-07-09 17:54:37,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479170652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:37,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019923738] [2021-07-09 17:54:37,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:37,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:54:37,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:37,969 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:37,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:38,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:38,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:38,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:38,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:38,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:38,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:38,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:38,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:38,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:38,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:38,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:38,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:38,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019923738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:38,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:38,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-07-09 17:54:38,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183912039] [2021-07-09 17:54:38,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:54:38,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:38,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:54:38,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:38,307 INFO L87 Difference]: Start difference. First operand 783 states and 1547 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:38,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:38,551 INFO L93 Difference]: Finished difference Result 1136 states and 2278 transitions. [2021-07-09 17:54:38,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:54:38,551 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:54:38,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:38,552 INFO L225 Difference]: With dead ends: 1136 [2021-07-09 17:54:38,553 INFO L226 Difference]: Without dead ends: 1113 [2021-07-09 17:54:38,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 396.2ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:38,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-07-09 17:54:38,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 777. [2021-07-09 17:54:38,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 1.9755154639175259) internal successors, (1533), 776 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:38,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1533 transitions. [2021-07-09 17:54:38,561 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1533 transitions. Word has length 31 [2021-07-09 17:54:38,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:38,561 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 1533 transitions. [2021-07-09 17:54:38,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1533 transitions. [2021-07-09 17:54:38,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:38,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:38,562 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:38,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 17:54:38,762 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:38,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:38,763 INFO L82 PathProgramCache]: Analyzing trace with hash 948748694, now seen corresponding path program 52 times [2021-07-09 17:54:38,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:38,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550196452] [2021-07-09 17:54:38,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:38,995 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:38,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:38,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550196452] [2021-07-09 17:54:38,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550196452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:38,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507041033] [2021-07-09 17:54:38,996 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 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 [2021-07-09 17:54:39,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:54:39,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:39,027 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:39,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:39,294 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-09 17:54:39,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:39,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:39,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:39,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:39,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:12 [2021-07-09 17:54:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:39,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507041033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:39,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:39,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-07-09 17:54:39,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407262648] [2021-07-09 17:54:39,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:54:39,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:39,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:54:39,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:54:39,325 INFO L87 Difference]: Start difference. First operand 777 states and 1533 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 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) [2021-07-09 17:54:39,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:39,545 INFO L93 Difference]: Finished difference Result 1012 states and 2014 transitions. [2021-07-09 17:54:39,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:54:39,545 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 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 31 [2021-07-09 17:54:39,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:39,546 INFO L225 Difference]: With dead ends: 1012 [2021-07-09 17:54:39,547 INFO L226 Difference]: Without dead ends: 997 [2021-07-09 17:54:39,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 415.0ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:54:39,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-07-09 17:54:39,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 784. [2021-07-09 17:54:39,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.9770114942528736) internal successors, (1548), 783 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:39,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1548 transitions. [2021-07-09 17:54:39,554 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1548 transitions. Word has length 31 [2021-07-09 17:54:39,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:39,555 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 1548 transitions. [2021-07-09 17:54:39,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 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) [2021-07-09 17:54:39,555 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1548 transitions. [2021-07-09 17:54:39,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:39,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:39,556 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:39,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-09 17:54:39,779 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:39,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:39,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1698443767, now seen corresponding path program 53 times [2021-07-09 17:54:39,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:39,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881982432] [2021-07-09 17:54:39,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:39,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:39,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881982432] [2021-07-09 17:54:39,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881982432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:39,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206808663] [2021-07-09 17:54:39,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:39,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:54:39,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:39,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:54:39,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:39,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206808663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:39,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:39,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:54:39,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037338723] [2021-07-09 17:54:39,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:54:39,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:39,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:54:39,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:54:39,895 INFO L87 Difference]: Start difference. First operand 784 states and 1548 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:39,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:39,922 INFO L93 Difference]: Finished difference Result 1073 states and 2126 transitions. [2021-07-09 17:54:39,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:54:39,922 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:39,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:39,923 INFO L225 Difference]: With dead ends: 1073 [2021-07-09 17:54:39,923 INFO L226 Difference]: Without dead ends: 1064 [2021-07-09 17:54:39,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:54:39,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-07-09 17:54:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 845. [2021-07-09 17:54:39,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 1.9940758293838863) internal successors, (1683), 844 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:39,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1683 transitions. [2021-07-09 17:54:39,934 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1683 transitions. Word has length 33 [2021-07-09 17:54:39,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:39,934 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 1683 transitions. [2021-07-09 17:54:39,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:39,934 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1683 transitions. [2021-07-09 17:54:39,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 17:54:39,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:39,935 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:40,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:40,141 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:40,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:40,141 INFO L82 PathProgramCache]: Analyzing trace with hash 602846472, now seen corresponding path program 54 times [2021-07-09 17:54:40,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:40,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712552810] [2021-07-09 17:54:40,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:54:40,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:40,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712552810] [2021-07-09 17:54:40,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712552810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:40,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104192139] [2021-07-09 17:54:40,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:40,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:54:40,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:40,401 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:40,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:40,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:40,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:40,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:40,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:40,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:40,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:40,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:40,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:40,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:40,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:40,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:40,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:40,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:40,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:40,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:40,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104192139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:40,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:40,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-07-09 17:54:40,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652352902] [2021-07-09 17:54:40,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:54:40,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:40,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:54:40,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:40,714 INFO L87 Difference]: Start difference. First operand 845 states and 1683 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:41,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:41,081 INFO L93 Difference]: Finished difference Result 1429 states and 2876 transitions. [2021-07-09 17:54:41,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:54:41,081 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 17:54:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:41,083 INFO L225 Difference]: With dead ends: 1429 [2021-07-09 17:54:41,084 INFO L226 Difference]: Without dead ends: 1414 [2021-07-09 17:54:41,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 512.8ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:54:41,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-07-09 17:54:41,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 869. [2021-07-09 17:54:41,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.9907834101382489) internal successors, (1728), 868 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1728 transitions. [2021-07-09 17:54:41,095 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1728 transitions. Word has length 34 [2021-07-09 17:54:41,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:41,095 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 1728 transitions. [2021-07-09 17:54:41,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:41,095 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1728 transitions. [2021-07-09 17:54:41,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 17:54:41,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:41,096 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:41,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-09 17:54:41,301 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:41,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:41,301 INFO L82 PathProgramCache]: Analyzing trace with hash 867153280, now seen corresponding path program 55 times [2021-07-09 17:54:41,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:41,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142350746] [2021-07-09 17:54:41,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:41,528 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:41,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:41,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142350746] [2021-07-09 17:54:41,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142350746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:41,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989444024] [2021-07-09 17:54:41,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:41,554 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:41,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:41,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:41,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:41,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:41,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:41,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:41,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:41,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:41,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:41,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:41,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:41,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:41,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:41,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:41,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:41,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989444024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:41,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:41,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-07-09 17:54:41,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150196658] [2021-07-09 17:54:41,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:54:41,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:41,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:54:41,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:41,869 INFO L87 Difference]: Start difference. First operand 869 states and 1728 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:42,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:42,272 INFO L93 Difference]: Finished difference Result 1640 states and 3316 transitions. [2021-07-09 17:54:42,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:54:42,272 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 17:54:42,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:42,274 INFO L225 Difference]: With dead ends: 1640 [2021-07-09 17:54:42,274 INFO L226 Difference]: Without dead ends: 1595 [2021-07-09 17:54:42,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 538.2ms TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:54:42,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-07-09 17:54:42,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 926. [2021-07-09 17:54:42,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.9848648648648648) internal successors, (1836), 925 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:42,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1836 transitions. [2021-07-09 17:54:42,285 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1836 transitions. Word has length 34 [2021-07-09 17:54:42,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:42,285 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 1836 transitions. [2021-07-09 17:54:42,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:42,285 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1836 transitions. [2021-07-09 17:54:42,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 17:54:42,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:42,287 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:42,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:42,501 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:42,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:42,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1679153002, now seen corresponding path program 56 times [2021-07-09 17:54:42,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:42,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039791891] [2021-07-09 17:54:42,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:42,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:42,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039791891] [2021-07-09 17:54:42,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039791891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:42,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603021258] [2021-07-09 17:54:42,697 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 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 [2021-07-09 17:54:42,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:42,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:42,723 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:42,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:43,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:43,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:43,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:43,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:43,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:43,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:43,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:43,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:43,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:43,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:43,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:43,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:43,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:43,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-09 17:54:43,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:43,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:43,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:43,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-09 17:54:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:43,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603021258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:43,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:43,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-07-09 17:54:43,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477739141] [2021-07-09 17:54:43,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:54:43,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:43,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:54:43,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:43,042 INFO L87 Difference]: Start difference. First operand 926 states and 1836 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:43,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:43,413 INFO L93 Difference]: Finished difference Result 1557 states and 3145 transitions. [2021-07-09 17:54:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:54:43,414 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 17:54:43,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:43,415 INFO L225 Difference]: With dead ends: 1557 [2021-07-09 17:54:43,415 INFO L226 Difference]: Without dead ends: 1512 [2021-07-09 17:54:43,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 498.1ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:54:43,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2021-07-09 17:54:43,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 896. [2021-07-09 17:54:43,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 1.987709497206704) internal successors, (1779), 895 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:43,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1779 transitions. [2021-07-09 17:54:43,426 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1779 transitions. Word has length 34 [2021-07-09 17:54:43,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:43,426 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 1779 transitions. [2021-07-09 17:54:43,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:43,427 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1779 transitions. [2021-07-09 17:54:43,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:54:43,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:43,428 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:43,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-09 17:54:43,628 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:43,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:43,629 INFO L82 PathProgramCache]: Analyzing trace with hash 431279499, now seen corresponding path program 57 times [2021-07-09 17:54:43,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:43,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132473959] [2021-07-09 17:54:43,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:43,894 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:54:43,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:43,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132473959] [2021-07-09 17:54:43,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132473959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:43,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647196477] [2021-07-09 17:54:43,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:43,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:54:43,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:43,922 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:54:43,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:44,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:44,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:44,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:44,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:44,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:44,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:44,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:44,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:44,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:44,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:44,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:44,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:44,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:44,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:44,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:44,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:44,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:44,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:44,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:44,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:44,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:44,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:44,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:44,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:44,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:54:44,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:44,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:44,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:44,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:54:44,424 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:44,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647196477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:44,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:44,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-07-09 17:54:44,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925253805] [2021-07-09 17:54:44,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:54:44,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:44,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:54:44,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:54:44,425 INFO L87 Difference]: Start difference. First operand 896 states and 1779 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:44,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:44,846 INFO L93 Difference]: Finished difference Result 1846 states and 3731 transitions. [2021-07-09 17:54:44,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:54:44,846 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:54:44,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:44,848 INFO L225 Difference]: With dead ends: 1846 [2021-07-09 17:54:44,848 INFO L226 Difference]: Without dead ends: 1801 [2021-07-09 17:54:44,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 665.0ms TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:54:44,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2021-07-09 17:54:44,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 926. [2021-07-09 17:54:44,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.9891891891891893) internal successors, (1840), 925 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:44,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1840 transitions. [2021-07-09 17:54:44,858 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1840 transitions. Word has length 36 [2021-07-09 17:54:44,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:44,859 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 1840 transitions. [2021-07-09 17:54:44,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:44,859 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1840 transitions. [2021-07-09 17:54:44,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:54:44,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:44,860 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:45,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:45,061 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:45,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:45,061 INFO L82 PathProgramCache]: Analyzing trace with hash 971114529, now seen corresponding path program 58 times [2021-07-09 17:54:45,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:45,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8815443] [2021-07-09 17:54:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:54:45,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:45,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8815443] [2021-07-09 17:54:45,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8815443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:45,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439944395] [2021-07-09 17:54:45,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:45,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:54:45,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:45,372 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:54:45,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:45,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:45,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:45,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:45,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:45,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:45,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:45,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:45,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:45,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:45,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:45,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:45,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:45,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:45,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:45,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:45,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:45,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:45,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:45,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:45,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:45,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:45,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:54:45,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:45,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:45,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:45,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:54:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:45,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439944395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:45,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:45,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-07-09 17:54:45,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468505057] [2021-07-09 17:54:45,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:54:45,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:45,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:54:45,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:54:45,919 INFO L87 Difference]: Start difference. First operand 926 states and 1840 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:46,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:46,479 INFO L93 Difference]: Finished difference Result 2095 states and 4241 transitions. [2021-07-09 17:54:46,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:54:46,480 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:54:46,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:46,481 INFO L225 Difference]: With dead ends: 2095 [2021-07-09 17:54:46,482 INFO L226 Difference]: Without dead ends: 2049 [2021-07-09 17:54:46,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 747.8ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:54:46,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-07-09 17:54:46,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1030. [2021-07-09 17:54:46,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 2.0136054421768708) internal successors, (2072), 1029 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:46,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 2072 transitions. [2021-07-09 17:54:46,494 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 2072 transitions. Word has length 36 [2021-07-09 17:54:46,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:46,494 INFO L482 AbstractCegarLoop]: Abstraction has 1030 states and 2072 transitions. [2021-07-09 17:54:46,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 2072 transitions. [2021-07-09 17:54:46,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:54:46,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:46,496 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:46,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-09 17:54:46,696 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:46,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:46,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1302699637, now seen corresponding path program 59 times [2021-07-09 17:54:46,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:46,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271762770] [2021-07-09 17:54:46,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:54:46,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:46,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271762770] [2021-07-09 17:54:46,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271762770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:46,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424766458] [2021-07-09 17:54:46,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:47,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:54:47,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:47,005 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-09 17:54:47,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:47,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:47,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:47,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:47,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:47,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:47,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:47,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:47,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:47,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:47,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:47,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:47,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:47,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:47,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:47,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:47,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:47,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:47,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:47,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:47,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:47,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:47,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:47,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:54:47,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:47,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:47,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:47,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:54:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:47,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424766458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:47,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:47,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-07-09 17:54:47,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746323931] [2021-07-09 17:54:47,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:54:47,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:47,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:54:47,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:54:47,571 INFO L87 Difference]: Start difference. First operand 1030 states and 2072 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:48,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:48,055 INFO L93 Difference]: Finished difference Result 1598 states and 3240 transitions. [2021-07-09 17:54:48,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:54:48,055 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:54:48,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:48,057 INFO L225 Difference]: With dead ends: 1598 [2021-07-09 17:54:48,057 INFO L226 Difference]: Without dead ends: 1576 [2021-07-09 17:54:48,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 729.1ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:54:48,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-07-09 17:54:48,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1036. [2021-07-09 17:54:48,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 2.0144927536231885) internal successors, (2085), 1035 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:48,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 2085 transitions. [2021-07-09 17:54:48,068 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 2085 transitions. Word has length 36 [2021-07-09 17:54:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:48,068 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 2085 transitions. [2021-07-09 17:54:48,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 2085 transitions. [2021-07-09 17:54:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:54:48,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:48,069 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:48,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:48,270 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:48,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:48,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1027051523, now seen corresponding path program 60 times [2021-07-09 17:54:48,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:48,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410899071] [2021-07-09 17:54:48,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:48,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:48,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410899071] [2021-07-09 17:54:48,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410899071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:48,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904995320] [2021-07-09 17:54:48,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:48,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:54:48,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:48,625 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:54:48,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:49,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:49,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:49,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:49,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:49,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:49,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:49,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:49,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:49,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:49,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:49,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:49,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:49,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:49,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:49,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:49,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:49,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:49,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:49,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:49,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:49,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:49,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:49,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:49,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:49,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:54:49,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:49,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:49,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:49,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:54:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:49,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904995320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:49,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:49,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-07-09 17:54:49,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400664219] [2021-07-09 17:54:49,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 17:54:49,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:49,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 17:54:49,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:54:49,152 INFO L87 Difference]: Start difference. First operand 1036 states and 2085 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:49,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:49,677 INFO L93 Difference]: Finished difference Result 2409 states and 4930 transitions. [2021-07-09 17:54:49,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:54:49,677 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:54:49,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:49,680 INFO L225 Difference]: With dead ends: 2409 [2021-07-09 17:54:49,680 INFO L226 Difference]: Without dead ends: 2332 [2021-07-09 17:54:49,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 775.3ms TimeCoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:54:49,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-07-09 17:54:49,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1084. [2021-07-09 17:54:49,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 2.0083102493074794) internal successors, (2175), 1083 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:49,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 2175 transitions. [2021-07-09 17:54:49,693 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 2175 transitions. Word has length 36 [2021-07-09 17:54:49,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:49,693 INFO L482 AbstractCegarLoop]: Abstraction has 1084 states and 2175 transitions. [2021-07-09 17:54:49,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:49,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 2175 transitions. [2021-07-09 17:54:49,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:54:49,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:49,695 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:49,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 17:54:49,895 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:49,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:49,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1566886553, now seen corresponding path program 61 times [2021-07-09 17:54:49,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:49,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218540729] [2021-07-09 17:54:49,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:50,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:50,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218540729] [2021-07-09 17:54:50,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218540729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:50,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519763352] [2021-07-09 17:54:50,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:50,276 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:54:50,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:50,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:50,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:50,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:50,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:50,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:50,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:50,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:50,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:50,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:50,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:50,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:50,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:50,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:50,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:50,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:50,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:50,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:50,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:50,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:50,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:50,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:54:50,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:50,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:50,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:50,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:54:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:50,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519763352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:50,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:50,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-07-09 17:54:50,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982402709] [2021-07-09 17:54:50,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 17:54:50,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:50,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 17:54:50,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:54:50,801 INFO L87 Difference]: Start difference. First operand 1084 states and 2175 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:51,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:51,269 INFO L93 Difference]: Finished difference Result 2544 states and 5180 transitions. [2021-07-09 17:54:51,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:54:51,270 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:54:51,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:51,272 INFO L225 Difference]: With dead ends: 2544 [2021-07-09 17:54:51,272 INFO L226 Difference]: Without dead ends: 2466 [2021-07-09 17:54:51,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 821.1ms TimeCoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:54:51,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-07-09 17:54:51,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 1207. [2021-07-09 17:54:51,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 1.9975124378109452) internal successors, (2409), 1206 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:51,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2409 transitions. [2021-07-09 17:54:51,291 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2409 transitions. Word has length 36 [2021-07-09 17:54:51,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:51,291 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 2409 transitions. [2021-07-09 17:54:51,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:51,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2409 transitions. [2021-07-09 17:54:51,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:54:51,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:51,293 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:51,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:51,509 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:51,509 INFO L82 PathProgramCache]: Analyzing trace with hash -706927613, now seen corresponding path program 62 times [2021-07-09 17:54:51,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:51,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768199704] [2021-07-09 17:54:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:51,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:51,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768199704] [2021-07-09 17:54:51,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768199704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:51,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002799294] [2021-07-09 17:54:51,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:51,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:51,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:51,803 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:54:51,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:52,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:52,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:52,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:52,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:52,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:52,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:52,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:52,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:52,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:52,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:52,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:52,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:52,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:52,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:52,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:52,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:52,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:52,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:52,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:52,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:52,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:54:52,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:52,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:52,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:52,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:54:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:52,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002799294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:52,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:52,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-07-09 17:54:52,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616437294] [2021-07-09 17:54:52,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 17:54:52,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:52,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 17:54:52,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:54:52,406 INFO L87 Difference]: Start difference. First operand 1207 states and 2409 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:52,826 INFO L93 Difference]: Finished difference Result 2101 states and 4239 transitions. [2021-07-09 17:54:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:54:52,826 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:54:52,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:52,829 INFO L225 Difference]: With dead ends: 2101 [2021-07-09 17:54:52,829 INFO L226 Difference]: Without dead ends: 2073 [2021-07-09 17:54:52,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 741.7ms TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:54:52,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2021-07-09 17:54:52,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 1207. [2021-07-09 17:54:52,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 1.9975124378109452) internal successors, (2409), 1206 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:52,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2409 transitions. [2021-07-09 17:54:52,842 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2409 transitions. Word has length 36 [2021-07-09 17:54:52,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:52,842 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 2409 transitions. [2021-07-09 17:54:52,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:52,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2409 transitions. [2021-07-09 17:54:52,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:54:52,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:52,843 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:53,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 17:54:53,044 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:53,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:53,044 INFO L82 PathProgramCache]: Analyzing trace with hash 623181831, now seen corresponding path program 63 times [2021-07-09 17:54:53,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:53,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792607981] [2021-07-09 17:54:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:54:53,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:53,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792607981] [2021-07-09 17:54:53,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792607981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:53,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601740074] [2021-07-09 17:54:53,296 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 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 [2021-07-09 17:54:53,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:54:53,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:53,323 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:54:53,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:53,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:53,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:53,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:53,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:53,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:53,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:53,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:53,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:53,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:53,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:53,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:53,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:53,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:53,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:53,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:53,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:53,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:53,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:53,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:53,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:53,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:53,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:54:53,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:53,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:53,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:53,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:54:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:53,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601740074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:53,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:53,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 28 [2021-07-09 17:54:53,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211444850] [2021-07-09 17:54:53,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:54:53,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:53,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:54:53,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:54:53,802 INFO L87 Difference]: Start difference. First operand 1207 states and 2409 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:54,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:54,255 INFO L93 Difference]: Finished difference Result 2018 states and 4044 transitions. [2021-07-09 17:54:54,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:54:54,256 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:54:54,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:54,258 INFO L225 Difference]: With dead ends: 2018 [2021-07-09 17:54:54,258 INFO L226 Difference]: Without dead ends: 1879 [2021-07-09 17:54:54,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 718.0ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:54:54,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2021-07-09 17:54:54,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1350. [2021-07-09 17:54:54,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.9940696812453669) internal successors, (2690), 1349 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:54,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2690 transitions. [2021-07-09 17:54:54,276 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2690 transitions. Word has length 36 [2021-07-09 17:54:54,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:54,276 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 2690 transitions. [2021-07-09 17:54:54,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:54,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2690 transitions. [2021-07-09 17:54:54,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:54:54,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:54,279 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:54,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 17:54:54,493 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:54,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:54,493 INFO L82 PathProgramCache]: Analyzing trace with hash 603825257, now seen corresponding path program 64 times [2021-07-09 17:54:54,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:54,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407644808] [2021-07-09 17:54:54,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:54,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:54,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407644808] [2021-07-09 17:54:54,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407644808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:54,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809886950] [2021-07-09 17:54:54,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:54,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:54:54,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:54,786 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:54:54,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:55,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:55,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:55,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:55,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:55,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:55,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:55,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:55,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:55,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:55,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:55,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:55,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:55,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:55,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:55,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:55,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:55,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:55,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:55,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:55,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:55,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:55,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:54:55,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:55,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:55,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:55,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:54:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:55,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809886950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:55,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:55,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-07-09 17:54:55,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310649344] [2021-07-09 17:54:55,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:54:55,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:55,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:54:55,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:54:55,301 INFO L87 Difference]: Start difference. First operand 1350 states and 2690 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:55,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:55,689 INFO L93 Difference]: Finished difference Result 2339 states and 4747 transitions. [2021-07-09 17:54:55,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:54:55,690 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:54:55,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:55,692 INFO L225 Difference]: With dead ends: 2339 [2021-07-09 17:54:55,692 INFO L226 Difference]: Without dead ends: 2297 [2021-07-09 17:54:55,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 719.5ms TimeCoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:54:55,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-07-09 17:54:55,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1365. [2021-07-09 17:54:55,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1364 states have (on average 1.9963343108504399) internal successors, (2723), 1364 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:55,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2723 transitions. [2021-07-09 17:54:55,708 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2723 transitions. Word has length 36 [2021-07-09 17:54:55,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:55,708 INFO L482 AbstractCegarLoop]: Abstraction has 1365 states and 2723 transitions. [2021-07-09 17:54:55,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:55,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2723 transitions. [2021-07-09 17:54:55,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:54:55,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:55,709 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:55,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 17:54:55,911 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:55,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:55,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1455840993, now seen corresponding path program 65 times [2021-07-09 17:54:55,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:55,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244489103] [2021-07-09 17:54:55,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:55,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:56,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:56,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244489103] [2021-07-09 17:54:56,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244489103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:56,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412206460] [2021-07-09 17:54:56,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:56,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:54:56,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:56,255 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:54:56,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:56,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:56,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:56,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:56,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:56,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:56,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:56,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:56,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:56,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:56,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:56,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:56,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:56,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:56,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:56,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:56,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:56,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:56,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:56,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:56,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:56,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:56,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:56,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:56,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:56,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:56,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-07-09 17:54:56,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:56,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:56,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:56,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-07-09 17:54:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:56,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412206460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:56,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:56,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 17:54:56,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694256580] [2021-07-09 17:54:56,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 17:54:56,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:56,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 17:54:56,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:54:56,864 INFO L87 Difference]: Start difference. First operand 1365 states and 2723 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:57,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:57,408 INFO L93 Difference]: Finished difference Result 2510 states and 5065 transitions. [2021-07-09 17:54:57,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:54:57,408 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:54:57,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:57,411 INFO L225 Difference]: With dead ends: 2510 [2021-07-09 17:54:57,411 INFO L226 Difference]: Without dead ends: 2465 [2021-07-09 17:54:57,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 875.9ms TimeCoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:54:57,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-07-09 17:54:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1365. [2021-07-09 17:54:57,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1364 states have (on average 1.9963343108504399) internal successors, (2723), 1364 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:57,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2723 transitions. [2021-07-09 17:54:57,433 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2723 transitions. Word has length 36 [2021-07-09 17:54:57,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:57,433 INFO L482 AbstractCegarLoop]: Abstraction has 1365 states and 2723 transitions. [2021-07-09 17:54:57,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:57,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2723 transitions. [2021-07-09 17:54:57,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:54:57,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:57,435 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:57,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:57,649 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:57,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:57,649 INFO L82 PathProgramCache]: Analyzing trace with hash -817973173, now seen corresponding path program 66 times [2021-07-09 17:54:57,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:57,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113993290] [2021-07-09 17:54:57,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:57,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:57,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113993290] [2021-07-09 17:54:57,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113993290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:57,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229002173] [2021-07-09 17:54:57,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:57,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:54:57,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:57,953 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:54:57,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:59,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:59,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:59,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:59,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:59,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:59,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:59,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:59,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:59,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:59,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:59,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:59,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:59,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:59,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:59,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:59,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:59,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:59,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:59,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:59,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:59,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:59,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 37 [2021-07-09 17:54:59,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:59,482 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.3 percent of original size [2021-07-09 17:54:59,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:59,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:104, output treesize:10 [2021-07-09 17:54:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:59,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229002173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:59,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:59,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-07-09 17:54:59,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851592883] [2021-07-09 17:54:59,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 17:54:59,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:59,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 17:54:59,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:54:59,534 INFO L87 Difference]: Start difference. First operand 1365 states and 2723 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:02,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:02,399 INFO L93 Difference]: Finished difference Result 2490 states and 5033 transitions. [2021-07-09 17:55:02,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:55:02,400 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:02,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:02,403 INFO L225 Difference]: With dead ends: 2490 [2021-07-09 17:55:02,403 INFO L226 Difference]: Without dead ends: 2398 [2021-07-09 17:55:02,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 2323.9ms TimeCoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:55:02,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2021-07-09 17:55:02,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 1439. [2021-07-09 17:55:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 2.0180806675938805) internal successors, (2902), 1438 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:02,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 2902 transitions. [2021-07-09 17:55:02,418 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 2902 transitions. Word has length 36 [2021-07-09 17:55:02,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:02,418 INFO L482 AbstractCegarLoop]: Abstraction has 1439 states and 2902 transitions. [2021-07-09 17:55:02,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:02,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 2902 transitions. [2021-07-09 17:55:02,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:02,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:02,420 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:02,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:02,621 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:02,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:02,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1925362883, now seen corresponding path program 67 times [2021-07-09 17:55:02,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:02,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38596411] [2021-07-09 17:55:02,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:02,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:02,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:02,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38596411] [2021-07-09 17:55:02,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38596411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:02,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350402585] [2021-07-09 17:55:02,936 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 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 [2021-07-09 17:55:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:02,961 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:02,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:03,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:03,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:03,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:03,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:03,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:03,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:03,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:03,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:03,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:03,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:03,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:03,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:03,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:03,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:03,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:03,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:03,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:03,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:03,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:03,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:03,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:03,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:03,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:03,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:03,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:03,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:03,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:03,498 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:03,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350402585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:03,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:03,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-07-09 17:55:03,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691345629] [2021-07-09 17:55:03,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 17:55:03,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:03,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 17:55:03,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:55:03,539 INFO L87 Difference]: Start difference. First operand 1439 states and 2902 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:04,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:04,084 INFO L93 Difference]: Finished difference Result 2160 states and 4385 transitions. [2021-07-09 17:55:04,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:55:04,084 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:04,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:04,086 INFO L225 Difference]: With dead ends: 2160 [2021-07-09 17:55:04,086 INFO L226 Difference]: Without dead ends: 2137 [2021-07-09 17:55:04,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 748.7ms TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:55:04,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-07-09 17:55:04,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1445. [2021-07-09 17:55:04,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 2.018698060941828) internal successors, (2915), 1444 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:04,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 2915 transitions. [2021-07-09 17:55:04,101 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 2915 transitions. Word has length 36 [2021-07-09 17:55:04,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:04,101 INFO L482 AbstractCegarLoop]: Abstraction has 1445 states and 2915 transitions. [2021-07-09 17:55:04,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:04,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 2915 transitions. [2021-07-09 17:55:04,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:04,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:04,102 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:04,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:04,303 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:04,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:04,304 INFO L82 PathProgramCache]: Analyzing trace with hash -325263507, now seen corresponding path program 68 times [2021-07-09 17:55:04,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:04,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748826838] [2021-07-09 17:55:04,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:04,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:55:04,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:04,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748826838] [2021-07-09 17:55:04,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748826838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:04,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633135735] [2021-07-09 17:55:04,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:04,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:55:04,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:04,569 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:04,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:05,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:05,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:05,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:05,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:05,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:05,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:05,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:05,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:05,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:05,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:05,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:05,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:05,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:05,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:05,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:05,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:05,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:05,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:05,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:05,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:05,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:05,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:05,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:05,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:05,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:05,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:05,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633135735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:05,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:05,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-07-09 17:55:05,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085511807] [2021-07-09 17:55:05,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:55:05,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:05,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:55:05,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:55:05,044 INFO L87 Difference]: Start difference. First operand 1445 states and 2915 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:05,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:05,352 INFO L93 Difference]: Finished difference Result 2272 states and 4614 transitions. [2021-07-09 17:55:05,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:55:05,353 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:05,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:05,355 INFO L225 Difference]: With dead ends: 2272 [2021-07-09 17:55:05,355 INFO L226 Difference]: Without dead ends: 2213 [2021-07-09 17:55:05,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 559.9ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:55:05,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2021-07-09 17:55:05,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 1517. [2021-07-09 17:55:05,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 2.0118733509234827) internal successors, (3050), 1516 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:05,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 3050 transitions. [2021-07-09 17:55:05,372 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 3050 transitions. Word has length 36 [2021-07-09 17:55:05,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:05,372 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 3050 transitions. [2021-07-09 17:55:05,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:05,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 3050 transitions. [2021-07-09 17:55:05,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:05,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:05,374 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:05,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-09 17:55:05,575 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:05,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:05,575 INFO L82 PathProgramCache]: Analyzing trace with hash 214571523, now seen corresponding path program 69 times [2021-07-09 17:55:05,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:05,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247170598] [2021-07-09 17:55:05,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:05,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:05,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247170598] [2021-07-09 17:55:05,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247170598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:05,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92471101] [2021-07-09 17:55:05,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:06,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:55:06,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:06,025 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:06,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:06,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:06,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:06,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:06,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:06,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:06,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:06,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:06,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:06,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:06,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:06,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:06,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:06,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:06,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:06,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:06,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:06,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:06,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:06,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:06,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:06,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:06,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:06,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:06,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:06,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:06,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:06,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:06,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:06,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92471101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:06,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:06,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-09 17:55:06,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451103692] [2021-07-09 17:55:06,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:55:06,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:06,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:55:06,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:55:06,524 INFO L87 Difference]: Start difference. First operand 1517 states and 3050 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:06,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:06,961 INFO L93 Difference]: Finished difference Result 2702 states and 5500 transitions. [2021-07-09 17:55:06,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:55:06,961 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:06,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:06,964 INFO L225 Difference]: With dead ends: 2702 [2021-07-09 17:55:06,964 INFO L226 Difference]: Without dead ends: 2605 [2021-07-09 17:55:06,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 653.5ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:55:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-07-09 17:55:06,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1571. [2021-07-09 17:55:06,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.0114649681528665) internal successors, (3158), 1570 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:06,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 3158 transitions. [2021-07-09 17:55:06,981 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 3158 transitions. Word has length 36 [2021-07-09 17:55:06,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:06,981 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 3158 transitions. [2021-07-09 17:55:06,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:06,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 3158 transitions. [2021-07-09 17:55:06,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:06,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:06,984 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:07,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:07,186 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:07,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:07,186 INFO L82 PathProgramCache]: Analyzing trace with hash -2059242643, now seen corresponding path program 70 times [2021-07-09 17:55:07,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:07,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273864477] [2021-07-09 17:55:07,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:07,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:07,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273864477] [2021-07-09 17:55:07,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273864477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:07,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540771629] [2021-07-09 17:55:07,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:07,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:55:07,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:07,451 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:07,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:07,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:07,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:07,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:07,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:07,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:07,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:07,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:07,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:07,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:07,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:07,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:07,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:07,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:07,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:07,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:07,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:07,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:07,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:07,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:07,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:07,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:07,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:07,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:07,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:07,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:07,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:07,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:07,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540771629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:07,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:07,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-09 17:55:07,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230302835] [2021-07-09 17:55:07,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:55:07,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:07,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:55:07,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:55:07,939 INFO L87 Difference]: Start difference. First operand 1571 states and 3158 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:08,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:08,231 INFO L93 Difference]: Finished difference Result 2210 states and 4470 transitions. [2021-07-09 17:55:08,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:55:08,231 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:08,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:08,234 INFO L225 Difference]: With dead ends: 2210 [2021-07-09 17:55:08,234 INFO L226 Difference]: Without dead ends: 2188 [2021-07-09 17:55:08,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 573.7ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:55:08,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-07-09 17:55:08,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1571. [2021-07-09 17:55:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.0114649681528665) internal successors, (3158), 1570 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:08,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 3158 transitions. [2021-07-09 17:55:08,249 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 3158 transitions. Word has length 36 [2021-07-09 17:55:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:08,250 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 3158 transitions. [2021-07-09 17:55:08,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:08,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 3158 transitions. [2021-07-09 17:55:08,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:08,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:08,251 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:08,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:08,465 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:08,465 INFO L82 PathProgramCache]: Analyzing trace with hash -729133199, now seen corresponding path program 71 times [2021-07-09 17:55:08,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:08,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528419774] [2021-07-09 17:55:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:55:08,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:08,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528419774] [2021-07-09 17:55:08,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528419774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:08,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910021435] [2021-07-09 17:55:08,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:08,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:55:08,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:08,721 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-09 17:55:08,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:09,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:09,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:09,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:09,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:09,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:09,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:09,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:09,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:09,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:09,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:09,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:09,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:09,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:09,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:09,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:09,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:09,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:09,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:09,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:09,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:09,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:09,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:09,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:09,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:09,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:09,207 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:09,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910021435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:09,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:09,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-07-09 17:55:09,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062247547] [2021-07-09 17:55:09,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:55:09,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:09,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:55:09,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:55:09,208 INFO L87 Difference]: Start difference. First operand 1571 states and 3158 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:09,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:09,634 INFO L93 Difference]: Finished difference Result 2485 states and 5026 transitions. [2021-07-09 17:55:09,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:55:09,635 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:09,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:09,637 INFO L225 Difference]: With dead ends: 2485 [2021-07-09 17:55:09,637 INFO L226 Difference]: Without dead ends: 2254 [2021-07-09 17:55:09,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 653.0ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:09,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-07-09 17:55:09,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1582. [2021-07-09 17:55:09,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 2.001897533206831) internal successors, (3165), 1581 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:09,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 3165 transitions. [2021-07-09 17:55:09,653 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 3165 transitions. Word has length 36 [2021-07-09 17:55:09,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:09,653 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 3165 transitions. [2021-07-09 17:55:09,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:09,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 3165 transitions. [2021-07-09 17:55:09,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:09,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:09,655 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:09,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:09,864 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:09,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:09,864 INFO L82 PathProgramCache]: Analyzing trace with hash 103525963, now seen corresponding path program 72 times [2021-07-09 17:55:09,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:09,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736024674] [2021-07-09 17:55:09,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:10,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:10,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736024674] [2021-07-09 17:55:10,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736024674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:10,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709442106] [2021-07-09 17:55:10,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:10,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:55:10,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:10,141 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:10,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:10,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:10,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:10,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:10,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:10,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:10,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:10,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:10,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:10,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:10,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:10,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:10,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:10,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:10,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:10,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:10,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:10,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:10,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:10,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:10,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:10,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:10,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:10,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:10,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:10,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:10,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709442106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:10,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:10,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:55:10,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003041895] [2021-07-09 17:55:10,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:55:10,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:10,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:55:10,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:10,666 INFO L87 Difference]: Start difference. First operand 1582 states and 3165 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:10,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:10,945 INFO L93 Difference]: Finished difference Result 2739 states and 5530 transitions. [2021-07-09 17:55:10,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:55:10,945 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:10,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:10,948 INFO L225 Difference]: With dead ends: 2739 [2021-07-09 17:55:10,948 INFO L226 Difference]: Without dead ends: 2676 [2021-07-09 17:55:10,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 631.6ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:10,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-07-09 17:55:10,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 1621. [2021-07-09 17:55:10,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.0) internal successors, (3240), 1620 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:10,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 3240 transitions. [2021-07-09 17:55:10,964 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 3240 transitions. Word has length 36 [2021-07-09 17:55:10,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:10,964 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 3240 transitions. [2021-07-09 17:55:10,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:10,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 3240 transitions. [2021-07-09 17:55:10,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:10,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:10,966 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:11,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-09 17:55:11,167 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:11,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:11,167 INFO L82 PathProgramCache]: Analyzing trace with hash 2124679093, now seen corresponding path program 73 times [2021-07-09 17:55:11,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:11,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856138792] [2021-07-09 17:55:11,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:11,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:11,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856138792] [2021-07-09 17:55:11,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856138792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:11,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568971868] [2021-07-09 17:55:11,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:11,436 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:11,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:11,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:11,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:11,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:11,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:11,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:11,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:11,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:11,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:11,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:11,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:11,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:11,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:11,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:11,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:11,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:11,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:11,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:11,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:11,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:11,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:11,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:11,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:11,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:11,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:11,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:11,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568971868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:11,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:11,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:55:11,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948700728] [2021-07-09 17:55:11,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:55:11,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:11,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:55:11,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:11,988 INFO L87 Difference]: Start difference. First operand 1621 states and 3240 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:12,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:12,289 INFO L93 Difference]: Finished difference Result 2343 states and 4717 transitions. [2021-07-09 17:55:12,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:55:12,290 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:12,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:12,293 INFO L225 Difference]: With dead ends: 2343 [2021-07-09 17:55:12,293 INFO L226 Difference]: Without dead ends: 2321 [2021-07-09 17:55:12,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 646.5ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:12,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2021-07-09 17:55:12,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 1627. [2021-07-09 17:55:12,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 2.0) internal successors, (3252), 1626 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:12,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 3252 transitions. [2021-07-09 17:55:12,309 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 3252 transitions. Word has length 36 [2021-07-09 17:55:12,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:12,309 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 3252 transitions. [2021-07-09 17:55:12,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:12,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 3252 transitions. [2021-07-09 17:55:12,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:12,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:12,311 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:12,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:12,511 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:12,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:12,512 INFO L82 PathProgramCache]: Analyzing trace with hash 573047853, now seen corresponding path program 74 times [2021-07-09 17:55:12,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:12,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759255917] [2021-07-09 17:55:12,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:12,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:12,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759255917] [2021-07-09 17:55:12,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759255917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:12,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695293245] [2021-07-09 17:55:12,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:12,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:55:12,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:12,819 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 17:55:12,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:13,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:13,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:13,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:13,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:13,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:13,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:13,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:13,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:13,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:13,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:13,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:13,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:13,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:13,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:13,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:13,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:13,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:13,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:13,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:13,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:13,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 37 [2021-07-09 17:55:13,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:13,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:13,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:13,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-07-09 17:55:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:13,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695293245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:13,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:13,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:55:13,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367646575] [2021-07-09 17:55:13,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:55:13,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:13,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:55:13,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:13,345 INFO L87 Difference]: Start difference. First operand 1627 states and 3252 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:13,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:13,738 INFO L93 Difference]: Finished difference Result 2287 states and 4610 transitions. [2021-07-09 17:55:13,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:55:13,739 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:13,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:13,742 INFO L225 Difference]: With dead ends: 2287 [2021-07-09 17:55:13,742 INFO L226 Difference]: Without dead ends: 2264 [2021-07-09 17:55:13,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 651.5ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:13,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-07-09 17:55:13,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1627. [2021-07-09 17:55:13,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 2.0) internal successors, (3252), 1626 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:13,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 3252 transitions. [2021-07-09 17:55:13,761 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 3252 transitions. Word has length 36 [2021-07-09 17:55:13,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:13,761 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 3252 transitions. [2021-07-09 17:55:13,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:13,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 3252 transitions. [2021-07-09 17:55:13,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:13,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:13,764 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:13,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-09 17:55:13,969 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:13,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:13,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1638712185, now seen corresponding path program 75 times [2021-07-09 17:55:13,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:13,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85465449] [2021-07-09 17:55:13,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:55:14,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:14,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85465449] [2021-07-09 17:55:14,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85465449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:14,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614877761] [2021-07-09 17:55:14,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:14,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:55:14,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:14,235 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:14,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:14,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:14,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:14,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:14,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:14,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:14,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:14,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:14,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:14,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:14,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:14,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:14,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:14,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:14,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:14,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:14,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:14,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:14,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:14,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:14,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:14,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:14,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:14,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:14,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:14,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:14,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614877761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:14,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:14,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-07-09 17:55:14,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393682917] [2021-07-09 17:55:14,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:55:14,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:14,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:55:14,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:55:14,743 INFO L87 Difference]: Start difference. First operand 1627 states and 3252 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:15,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:15,035 INFO L93 Difference]: Finished difference Result 2567 states and 5154 transitions. [2021-07-09 17:55:15,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:55:15,036 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:15,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:15,038 INFO L225 Difference]: With dead ends: 2567 [2021-07-09 17:55:15,038 INFO L226 Difference]: Without dead ends: 2346 [2021-07-09 17:55:15,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 675.8ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:15,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-07-09 17:55:15,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1699. [2021-07-09 17:55:15,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1698 states have (on average 1.9976442873969376) internal successors, (3392), 1698 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 3392 transitions. [2021-07-09 17:55:15,054 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 3392 transitions. Word has length 36 [2021-07-09 17:55:15,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:15,055 INFO L482 AbstractCegarLoop]: Abstraction has 1699 states and 3392 transitions. [2021-07-09 17:55:15,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:15,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 3392 transitions. [2021-07-09 17:55:15,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:15,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:15,056 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:15,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:15,257 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:15,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:15,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1182283007, now seen corresponding path program 76 times [2021-07-09 17:55:15,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:15,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546978705] [2021-07-09 17:55:15,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:15,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:15,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546978705] [2021-07-09 17:55:15,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546978705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:15,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674455765] [2021-07-09 17:55:15,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:15,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:55:15,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:15,559 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:15,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:16,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:16,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:16,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:16,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:16,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:16,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:16,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:16,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:16,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:16,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:16,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:16,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:16,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:16,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:16,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:16,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:16,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:16,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:16,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:16,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:16,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:16,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:16,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:16,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:16,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:16,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674455765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:16,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:16,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-09 17:55:16,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080008352] [2021-07-09 17:55:16,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:55:16,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:16,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:55:16,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:55:16,055 INFO L87 Difference]: Start difference. First operand 1699 states and 3392 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:16,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:16,350 INFO L93 Difference]: Finished difference Result 3110 states and 6274 transitions. [2021-07-09 17:55:16,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:55:16,350 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:16,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:16,353 INFO L225 Difference]: With dead ends: 3110 [2021-07-09 17:55:16,353 INFO L226 Difference]: Without dead ends: 3051 [2021-07-09 17:55:16,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 631.6ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:55:16,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-07-09 17:55:16,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 1690. [2021-07-09 17:55:16,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.9964476021314388) internal successors, (3372), 1689 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:16,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 3372 transitions. [2021-07-09 17:55:16,372 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 3372 transitions. Word has length 36 [2021-07-09 17:55:16,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:16,372 INFO L482 AbstractCegarLoop]: Abstraction has 1690 states and 3372 transitions. [2021-07-09 17:55:16,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:16,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 3372 transitions. [2021-07-09 17:55:16,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:16,373 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:16,373 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:16,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:16,574 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:16,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:16,575 INFO L82 PathProgramCache]: Analyzing trace with hash -806053023, now seen corresponding path program 77 times [2021-07-09 17:55:16,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:16,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995856673] [2021-07-09 17:55:16,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:16,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:16,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:16,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995856673] [2021-07-09 17:55:16,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995856673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:16,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792685443] [2021-07-09 17:55:16,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:16,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:55:16,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:16,941 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:16,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:17,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:17,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:17,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:17,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:17,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:17,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:17,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:17,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:17,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:17,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:17,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:17,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:17,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:17,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:17,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:17,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:17,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:17,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:17,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:17,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:17,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:17,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:17,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:17,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:17,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:17,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:17,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:17,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:17,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:17,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792685443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:17,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:17,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:55:17,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441520047] [2021-07-09 17:55:17,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:55:17,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:17,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:55:17,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:17,508 INFO L87 Difference]: Start difference. First operand 1690 states and 3372 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:17,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:17,941 INFO L93 Difference]: Finished difference Result 2909 states and 5872 transitions. [2021-07-09 17:55:17,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:55:17,941 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:17,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:17,944 INFO L225 Difference]: With dead ends: 2909 [2021-07-09 17:55:17,944 INFO L226 Difference]: Without dead ends: 2846 [2021-07-09 17:55:17,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 689.9ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:17,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-07-09 17:55:17,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1717. [2021-07-09 17:55:17,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 1.9965034965034965) internal successors, (3426), 1716 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:17,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 3426 transitions. [2021-07-09 17:55:17,962 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 3426 transitions. Word has length 36 [2021-07-09 17:55:17,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:17,963 INFO L482 AbstractCegarLoop]: Abstraction has 1717 states and 3426 transitions. [2021-07-09 17:55:17,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:17,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 3426 transitions. [2021-07-09 17:55:17,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:17,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:17,965 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:18,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:18,165 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:18,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:18,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1215100107, now seen corresponding path program 78 times [2021-07-09 17:55:18,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:18,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320974328] [2021-07-09 17:55:18,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:18,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:18,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320974328] [2021-07-09 17:55:18,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320974328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:18,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450768510] [2021-07-09 17:55:18,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:18,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:55:18,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:18,439 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:18,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:18,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:18,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:18,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:18,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:18,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:18,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:18,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:18,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:18,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:18,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:18,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:18,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:18,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:18,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:18,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:18,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:18,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:18,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:18,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:18,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:18,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:18,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:18,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:18,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:18,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:18,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450768510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:18,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:18,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:55:18,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221170662] [2021-07-09 17:55:18,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:55:18,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:18,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:55:18,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:18,943 INFO L87 Difference]: Start difference. First operand 1717 states and 3426 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:19,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:19,321 INFO L93 Difference]: Finished difference Result 2369 states and 4761 transitions. [2021-07-09 17:55:19,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:55:19,321 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:19,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:19,324 INFO L225 Difference]: With dead ends: 2369 [2021-07-09 17:55:19,324 INFO L226 Difference]: Without dead ends: 2347 [2021-07-09 17:55:19,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 599.6ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:19,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-07-09 17:55:19,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 1726. [2021-07-09 17:55:19,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 1.9965217391304348) internal successors, (3444), 1725 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 3444 transitions. [2021-07-09 17:55:19,349 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 3444 transitions. Word has length 36 [2021-07-09 17:55:19,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:19,349 INFO L482 AbstractCegarLoop]: Abstraction has 1726 states and 3444 transitions. [2021-07-09 17:55:19,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:19,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 3444 transitions. [2021-07-09 17:55:19,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:19,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:19,351 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:19,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:19,552 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:19,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:19,552 INFO L82 PathProgramCache]: Analyzing trace with hash -336531133, now seen corresponding path program 79 times [2021-07-09 17:55:19,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:19,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579644152] [2021-07-09 17:55:19,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:19,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:19,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579644152] [2021-07-09 17:55:19,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579644152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:19,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204048260] [2021-07-09 17:55:19,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:19,872 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:19,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:20,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:20,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:20,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:20,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:20,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:20,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:20,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:20,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:20,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:20,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:20,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:20,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:20,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:20,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:20,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:20,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:20,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:20,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:20,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:20,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:20,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:20,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:20,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:20,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:20,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:20,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:20,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204048260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:20,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:20,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:55:20,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521037845] [2021-07-09 17:55:20,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:55:20,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:20,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:55:20,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:20,444 INFO L87 Difference]: Start difference. First operand 1726 states and 3444 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:20,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:20,849 INFO L93 Difference]: Finished difference Result 2328 states and 4682 transitions. [2021-07-09 17:55:20,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:55:20,850 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:20,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:20,852 INFO L225 Difference]: With dead ends: 2328 [2021-07-09 17:55:20,852 INFO L226 Difference]: Without dead ends: 2305 [2021-07-09 17:55:20,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 676.6ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-07-09 17:55:20,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1726. [2021-07-09 17:55:20,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 1.9965217391304348) internal successors, (3444), 1725 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 3444 transitions. [2021-07-09 17:55:20,876 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 3444 transitions. Word has length 36 [2021-07-09 17:55:20,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:20,876 INFO L482 AbstractCegarLoop]: Abstraction has 1726 states and 3444 transitions. [2021-07-09 17:55:20,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:20,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 3444 transitions. [2021-07-09 17:55:20,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:20,879 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:20,879 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:21,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:21,094 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:21,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:21,094 INFO L82 PathProgramCache]: Analyzing trace with hash 666409005, now seen corresponding path program 80 times [2021-07-09 17:55:21,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:21,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535985790] [2021-07-09 17:55:21,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:21,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:21,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535985790] [2021-07-09 17:55:21,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535985790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:21,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211285499] [2021-07-09 17:55:21,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:55:21,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:55:21,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:21,440 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 17:55:21,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:21,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:21,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:21,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:21,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:21,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:21,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:21,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:21,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:21,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:21,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:21,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:21,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:21,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:21,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:21,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:21,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:21,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:21,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:21,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:21,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:21,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 37 [2021-07-09 17:55:21,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:22,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:22,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:22,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-07-09 17:55:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:22,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211285499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:22,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:22,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:55:22,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198026473] [2021-07-09 17:55:22,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:55:22,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:22,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:55:22,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:22,011 INFO L87 Difference]: Start difference. First operand 1726 states and 3444 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:22,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:22,352 INFO L93 Difference]: Finished difference Result 2252 states and 4526 transitions. [2021-07-09 17:55:22,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:55:22,353 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:22,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:22,355 INFO L225 Difference]: With dead ends: 2252 [2021-07-09 17:55:22,355 INFO L226 Difference]: Without dead ends: 2228 [2021-07-09 17:55:22,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 717.9ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:22,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-07-09 17:55:22,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 1729. [2021-07-09 17:55:22,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 1.9965277777777777) internal successors, (3450), 1728 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:22,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 3450 transitions. [2021-07-09 17:55:22,375 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 3450 transitions. Word has length 36 [2021-07-09 17:55:22,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:22,375 INFO L482 AbstractCegarLoop]: Abstraction has 1729 states and 3450 transitions. [2021-07-09 17:55:22,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:22,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 3450 transitions. [2021-07-09 17:55:22,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:22,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:22,377 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:22,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:22,578 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:22,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:22,578 INFO L82 PathProgramCache]: Analyzing trace with hash -30986797, now seen corresponding path program 81 times [2021-07-09 17:55:22,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:22,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721572187] [2021-07-09 17:55:22,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:55:22,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:22,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721572187] [2021-07-09 17:55:22,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721572187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:22,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431842527] [2021-07-09 17:55:22,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:22,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:55:22,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:22,857 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:22,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:23,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:23,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:23,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:23,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:23,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:23,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:23,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:23,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:23,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:23,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:23,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:23,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:23,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:23,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:23,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:23,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:23,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:23,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:23,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:23,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:23,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:23,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:23,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:23,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:23,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:23,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:23,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:23,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431842527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:23,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:23,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-07-09 17:55:23,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075995412] [2021-07-09 17:55:23,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:55:23,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:23,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:55:23,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:23,381 INFO L87 Difference]: Start difference. First operand 1729 states and 3450 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:23,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:23,963 INFO L93 Difference]: Finished difference Result 3640 states and 7355 transitions. [2021-07-09 17:55:23,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:55:23,963 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:23,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:23,967 INFO L225 Difference]: With dead ends: 3640 [2021-07-09 17:55:23,967 INFO L226 Difference]: Without dead ends: 3597 [2021-07-09 17:55:23,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 716.0ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:55:23,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3597 states. [2021-07-09 17:55:23,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3597 to 1800. [2021-07-09 17:55:23,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 1.991106170094497) internal successors, (3582), 1799 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:23,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 3582 transitions. [2021-07-09 17:55:23,989 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 3582 transitions. Word has length 36 [2021-07-09 17:55:23,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:23,989 INFO L482 AbstractCegarLoop]: Abstraction has 1800 states and 3582 transitions. [2021-07-09 17:55:23,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:23,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 3582 transitions. [2021-07-09 17:55:23,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:23,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:23,991 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:24,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:24,192 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:24,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:24,192 INFO L82 PathProgramCache]: Analyzing trace with hash 564785227, now seen corresponding path program 82 times [2021-07-09 17:55:24,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:24,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667798938] [2021-07-09 17:55:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:24,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:24,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667798938] [2021-07-09 17:55:24,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667798938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:24,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821328760] [2021-07-09 17:55:24,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:24,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:55:24,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:24,496 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:24,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:24,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:24,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:24,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:24,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:24,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:24,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:24,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:24,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:24,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:24,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:24,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:24,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:24,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:24,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:24,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:24,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:24,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:24,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:24,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:24,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:24,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:24,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:25,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:25,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:25,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:25,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:25,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821328760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:25,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:25,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-07-09 17:55:25,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918641308] [2021-07-09 17:55:25,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 17:55:25,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:25,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 17:55:25,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:55:25,042 INFO L87 Difference]: Start difference. First operand 1800 states and 3582 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:25,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:25,561 INFO L93 Difference]: Finished difference Result 3718 states and 7520 transitions. [2021-07-09 17:55:25,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:55:25,561 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:25,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:25,565 INFO L225 Difference]: With dead ends: 3718 [2021-07-09 17:55:25,565 INFO L226 Difference]: Without dead ends: 3670 [2021-07-09 17:55:25,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 795.0ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:55:25,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2021-07-09 17:55:25,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 1884. [2021-07-09 17:55:25,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 1.9867233138608604) internal successors, (3741), 1883 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:25,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 3741 transitions. [2021-07-09 17:55:25,605 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 3741 transitions. Word has length 36 [2021-07-09 17:55:25,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:25,606 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 3741 transitions. [2021-07-09 17:55:25,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:25,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 3741 transitions. [2021-07-09 17:55:25,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:25,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:25,609 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:25,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-09 17:55:25,825 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:25,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:25,825 INFO L82 PathProgramCache]: Analyzing trace with hash 453739667, now seen corresponding path program 83 times [2021-07-09 17:55:25,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:25,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867363659] [2021-07-09 17:55:25,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:26,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:26,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867363659] [2021-07-09 17:55:26,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867363659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:26,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028666478] [2021-07-09 17:55:26,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:26,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:55:26,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:26,139 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-09 17:55:26,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:26,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:26,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:26,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:26,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:26,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:26,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:26,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:26,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:26,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:26,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:26,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:26,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:26,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:26,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:26,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:26,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:26,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:26,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:26,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:26,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:26,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:26,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:26,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:26,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:26,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:26,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028666478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:26,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:26,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-07-09 17:55:26,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961296340] [2021-07-09 17:55:26,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 17:55:26,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:26,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 17:55:26,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:55:26,700 INFO L87 Difference]: Start difference. First operand 1884 states and 3741 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:27,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:27,318 INFO L93 Difference]: Finished difference Result 3721 states and 7510 transitions. [2021-07-09 17:55:27,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:55:27,319 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:27,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:27,323 INFO L225 Difference]: With dead ends: 3721 [2021-07-09 17:55:27,323 INFO L226 Difference]: Without dead ends: 3678 [2021-07-09 17:55:27,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 815.5ms TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:55:27,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2021-07-09 17:55:27,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 1956. [2021-07-09 17:55:27,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1955 states have (on average 1.984143222506394) internal successors, (3879), 1955 states have internal predecessors, (3879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:27,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 3879 transitions. [2021-07-09 17:55:27,345 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 3879 transitions. Word has length 36 [2021-07-09 17:55:27,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:27,345 INFO L482 AbstractCegarLoop]: Abstraction has 1956 states and 3879 transitions. [2021-07-09 17:55:27,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:27,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 3879 transitions. [2021-07-09 17:55:27,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:27,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:27,348 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:27,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:27,548 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:27,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:27,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1097891573, now seen corresponding path program 84 times [2021-07-09 17:55:27,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:27,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837912739] [2021-07-09 17:55:27,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:27,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:27,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837912739] [2021-07-09 17:55:27,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837912739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:27,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44760588] [2021-07-09 17:55:27,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:27,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:55:27,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:27,873 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:27,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:28,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:28,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:28,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:28,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:28,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:28,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:28,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:28,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:28,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:28,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:28,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:28,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:28,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:28,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:28,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:28,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:28,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:28,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:28,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:28,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:28,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:28,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:28,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:28,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:28,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:28,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44760588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:28,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:28,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-07-09 17:55:28,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288584906] [2021-07-09 17:55:28,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 17:55:28,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:28,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 17:55:28,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:55:28,422 INFO L87 Difference]: Start difference. First operand 1956 states and 3879 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:29,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:29,118 INFO L93 Difference]: Finished difference Result 3689 states and 7457 transitions. [2021-07-09 17:55:29,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:55:29,118 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:29,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:29,123 INFO L225 Difference]: With dead ends: 3689 [2021-07-09 17:55:29,123 INFO L226 Difference]: Without dead ends: 3644 [2021-07-09 17:55:29,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 835.8ms TimeCoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:55:29,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3644 states. [2021-07-09 17:55:29,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3644 to 1973. [2021-07-09 17:55:29,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 1.9852941176470589) internal successors, (3915), 1972 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:29,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 3915 transitions. [2021-07-09 17:55:29,147 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 3915 transitions. Word has length 36 [2021-07-09 17:55:29,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:29,147 INFO L482 AbstractCegarLoop]: Abstraction has 1973 states and 3915 transitions. [2021-07-09 17:55:29,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:29,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 3915 transitions. [2021-07-09 17:55:29,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:29,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:29,149 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:29,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-09 17:55:29,357 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:29,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:29,357 INFO L82 PathProgramCache]: Analyzing trace with hash -787529803, now seen corresponding path program 85 times [2021-07-09 17:55:29,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:29,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833522272] [2021-07-09 17:55:29,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:29,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:29,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833522272] [2021-07-09 17:55:29,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833522272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:29,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271090923] [2021-07-09 17:55:29,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:29,659 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:29,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:30,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:30,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:30,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:30,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:30,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:30,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:30,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:30,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:30,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:30,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:30,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:30,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:30,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:30,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:30,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:30,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:30,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:30,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:30,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:30,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:30,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:30,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:30,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:30,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:30,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:30,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271090923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:30,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:30,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-09 17:55:30,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206511106] [2021-07-09 17:55:30,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:55:30,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:30,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:55:30,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:55:30,178 INFO L87 Difference]: Start difference. First operand 1973 states and 3915 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:30,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:30,702 INFO L93 Difference]: Finished difference Result 3068 states and 6162 transitions. [2021-07-09 17:55:30,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:55:30,702 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:30,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:30,713 INFO L225 Difference]: With dead ends: 3068 [2021-07-09 17:55:30,713 INFO L226 Difference]: Without dead ends: 3006 [2021-07-09 17:55:30,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 637.7ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:30,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3006 states. [2021-07-09 17:55:30,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 1967. [2021-07-09 17:55:30,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 1.9852492370295016) internal successors, (3903), 1966 states have internal predecessors, (3903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:30,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 3903 transitions. [2021-07-09 17:55:30,732 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 3903 transitions. Word has length 36 [2021-07-09 17:55:30,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:30,733 INFO L482 AbstractCegarLoop]: Abstraction has 1967 states and 3903 transitions. [2021-07-09 17:55:30,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:30,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 3903 transitions. [2021-07-09 17:55:30,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:30,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:30,735 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:30,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:30,935 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:30,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:30,935 INFO L82 PathProgramCache]: Analyzing trace with hash -898575363, now seen corresponding path program 86 times [2021-07-09 17:55:30,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:30,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268172336] [2021-07-09 17:55:30,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:31,211 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:31,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:31,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268172336] [2021-07-09 17:55:31,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268172336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:31,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625130891] [2021-07-09 17:55:31,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:55:31,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:55:31,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:31,236 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:31,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:31,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:31,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:31,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:31,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:31,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:31,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:31,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:31,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:31,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:31,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:31,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:31,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:31,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:31,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:31,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:31,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:31,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:31,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:31,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:31,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:31,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:31,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:31,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:31,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:31,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:31,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625130891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:31,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:31,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:55:31,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134643526] [2021-07-09 17:55:31,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:55:31,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:31,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:55:31,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:31,770 INFO L87 Difference]: Start difference. First operand 1967 states and 3903 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:32,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:32,207 INFO L93 Difference]: Finished difference Result 3053 states and 6129 transitions. [2021-07-09 17:55:32,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:55:32,208 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:32,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:32,211 INFO L225 Difference]: With dead ends: 3053 [2021-07-09 17:55:32,211 INFO L226 Difference]: Without dead ends: 2991 [2021-07-09 17:55:32,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 659.1ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:55:32,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-07-09 17:55:32,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 1964. [2021-07-09 17:55:32,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 1.9852266938359653) internal successors, (3897), 1963 states have internal predecessors, (3897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:32,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 3897 transitions. [2021-07-09 17:55:32,230 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 3897 transitions. Word has length 36 [2021-07-09 17:55:32,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:32,231 INFO L482 AbstractCegarLoop]: Abstraction has 1964 states and 3897 transitions. [2021-07-09 17:55:32,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:32,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 3897 transitions. [2021-07-09 17:55:32,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:32,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:32,233 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:32,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:32,433 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:32,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:32,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1844760693, now seen corresponding path program 87 times [2021-07-09 17:55:32,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:32,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856580415] [2021-07-09 17:55:32,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:32,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:32,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856580415] [2021-07-09 17:55:32,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856580415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:32,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799717750] [2021-07-09 17:55:32,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:32,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:55:32,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:32,712 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:32,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:33,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:33,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:33,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:33,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:33,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:33,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:33,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:33,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:33,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:33,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:33,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:33,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:33,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:33,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:33,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:33,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:33,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:33,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:33,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:33,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:33,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:33,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:33,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:33,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:33,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:33,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:33,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799717750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:33,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:33,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:55:33,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342340803] [2021-07-09 17:55:33,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:55:33,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:33,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:55:33,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:33,237 INFO L87 Difference]: Start difference. First operand 1964 states and 3897 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:33,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:33,705 INFO L93 Difference]: Finished difference Result 3170 states and 6381 transitions. [2021-07-09 17:55:33,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:55:33,705 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:33,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:33,708 INFO L225 Difference]: With dead ends: 3170 [2021-07-09 17:55:33,708 INFO L226 Difference]: Without dead ends: 3105 [2021-07-09 17:55:33,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 645.4ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:55:33,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3105 states. [2021-07-09 17:55:33,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3105 to 1988. [2021-07-09 17:55:33,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 1.9838953195772522) internal successors, (3942), 1987 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:33,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 3942 transitions. [2021-07-09 17:55:33,727 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 3942 transitions. Word has length 36 [2021-07-09 17:55:33,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:33,727 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 3942 transitions. [2021-07-09 17:55:33,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:33,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 3942 transitions. [2021-07-09 17:55:33,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:33,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:33,729 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:33,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:33,929 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:33,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:33,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1808154349, now seen corresponding path program 88 times [2021-07-09 17:55:33,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:33,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570534440] [2021-07-09 17:55:33,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:33,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:34,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:34,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570534440] [2021-07-09 17:55:34,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570534440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:34,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522501139] [2021-07-09 17:55:34,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:34,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:55:34,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:34,279 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:34,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:34,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:34,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:34,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:34,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:34,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:34,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:34,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:34,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:34,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:34,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:34,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:34,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:34,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:34,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:34,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:34,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:34,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:34,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:34,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:34,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:34,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:34,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:34,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:34,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:34,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:34,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:34,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522501139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:34,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:34,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:55:34,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420299152] [2021-07-09 17:55:34,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:55:34,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:34,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:55:34,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:34,865 INFO L87 Difference]: Start difference. First operand 1988 states and 3942 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:35,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:35,425 INFO L93 Difference]: Finished difference Result 3044 states and 6092 transitions. [2021-07-09 17:55:35,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:55:35,425 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:35,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:35,429 INFO L225 Difference]: With dead ends: 3044 [2021-07-09 17:55:35,429 INFO L226 Difference]: Without dead ends: 3002 [2021-07-09 17:55:35,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 755.1ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:55:35,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-07-09 17:55:35,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 1982. [2021-07-09 17:55:35,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 1.983846542150429) internal successors, (3930), 1981 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:35,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 3930 transitions. [2021-07-09 17:55:35,448 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 3930 transitions. Word has length 36 [2021-07-09 17:55:35,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:35,449 INFO L482 AbstractCegarLoop]: Abstraction has 1982 states and 3930 transitions. [2021-07-09 17:55:35,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:35,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 3930 transitions. [2021-07-09 17:55:35,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:35,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:35,450 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:35,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:35,651 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:35,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:35,651 INFO L82 PathProgramCache]: Analyzing trace with hash 935181707, now seen corresponding path program 89 times [2021-07-09 17:55:35,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:35,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657251877] [2021-07-09 17:55:35,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:35,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:35,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657251877] [2021-07-09 17:55:35,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657251877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:35,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183184243] [2021-07-09 17:55:35,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:35,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:55:35,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:35,943 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:35,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:36,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:36,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:36,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:36,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:36,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:36,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:36,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:36,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:36,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:36,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:36,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:36,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:36,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:36,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:36,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:36,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:36,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:36,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:36,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:36,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:36,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:36,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:36,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:36,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:36,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:36,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183184243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:36,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:36,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:55:36,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396675011] [2021-07-09 17:55:36,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:55:36,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:36,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:55:36,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:36,468 INFO L87 Difference]: Start difference. First operand 1982 states and 3930 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:37,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:37,051 INFO L93 Difference]: Finished difference Result 2927 states and 5852 transitions. [2021-07-09 17:55:37,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:55:37,052 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:37,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:37,055 INFO L225 Difference]: With dead ends: 2927 [2021-07-09 17:55:37,055 INFO L226 Difference]: Without dead ends: 2904 [2021-07-09 17:55:37,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 658.2ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:55:37,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2021-07-09 17:55:37,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 1985. [2021-07-09 17:55:37,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1984 states have (on average 1.9838709677419355) internal successors, (3936), 1984 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 3936 transitions. [2021-07-09 17:55:37,077 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 3936 transitions. Word has length 36 [2021-07-09 17:55:37,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:37,077 INFO L482 AbstractCegarLoop]: Abstraction has 1985 states and 3936 transitions. [2021-07-09 17:55:37,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:37,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 3936 transitions. [2021-07-09 17:55:37,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:37,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:37,079 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:37,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-07-09 17:55:37,280 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:37,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:37,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1938121845, now seen corresponding path program 90 times [2021-07-09 17:55:37,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:37,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60342390] [2021-07-09 17:55:37,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:37,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:37,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60342390] [2021-07-09 17:55:37,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60342390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:37,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419815919] [2021-07-09 17:55:37,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:37,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:55:37,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:37,590 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:37,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:38,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:38,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:38,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:38,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:38,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:38,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:38,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:38,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:38,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:38,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:38,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:38,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:38,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:38,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:38,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:38,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:38,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:38,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:38,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:38,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:38,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:38,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:38,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:38,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:38,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:38,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:38,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:38,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:38,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:38,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419815919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:38,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:38,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:55:38,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629677017] [2021-07-09 17:55:38,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:55:38,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:38,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:55:38,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:38,173 INFO L87 Difference]: Start difference. First operand 1985 states and 3936 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:38,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:38,704 INFO L93 Difference]: Finished difference Result 2935 states and 5869 transitions. [2021-07-09 17:55:38,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:55:38,705 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:38,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:38,708 INFO L225 Difference]: With dead ends: 2935 [2021-07-09 17:55:38,708 INFO L226 Difference]: Without dead ends: 2911 [2021-07-09 17:55:38,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 701.1ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:55:38,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2021-07-09 17:55:38,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 1982. [2021-07-09 17:55:38,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 1.983846542150429) internal successors, (3930), 1981 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 3930 transitions. [2021-07-09 17:55:38,727 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 3930 transitions. Word has length 36 [2021-07-09 17:55:38,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:38,727 INFO L482 AbstractCegarLoop]: Abstraction has 1982 states and 3930 transitions. [2021-07-09 17:55:38,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:38,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 3930 transitions. [2021-07-09 17:55:38,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:38,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:38,729 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:38,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:38,930 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:38,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:38,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1884098707, now seen corresponding path program 91 times [2021-07-09 17:55:38,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:38,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525586769] [2021-07-09 17:55:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:55:39,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:39,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525586769] [2021-07-09 17:55:39,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525586769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:39,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864018224] [2021-07-09 17:55:39,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:39,174 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:39,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:39,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:39,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:39,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:39,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:39,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:39,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:39,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:39,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:39,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:39,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:39,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:39,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:39,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:39,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:39,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:39,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:39,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:39,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:39,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:39,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:39,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:39,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:39,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:39,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:39,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:39,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864018224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:39,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:39,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-07-09 17:55:39,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544320826] [2021-07-09 17:55:39,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:55:39,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:39,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:55:39,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:55:39,640 INFO L87 Difference]: Start difference. First operand 1982 states and 3930 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:40,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:40,168 INFO L93 Difference]: Finished difference Result 3201 states and 6417 transitions. [2021-07-09 17:55:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:55:40,168 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:40,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:40,172 INFO L225 Difference]: With dead ends: 3201 [2021-07-09 17:55:40,172 INFO L226 Difference]: Without dead ends: 3012 [2021-07-09 17:55:40,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 666.2ms TimeCoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:55:40,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2021-07-09 17:55:40,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 2015. [2021-07-09 17:55:40,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 1.9821251241310824) internal successors, (3992), 2014 states have internal predecessors, (3992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:40,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 3992 transitions. [2021-07-09 17:55:40,192 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 3992 transitions. Word has length 36 [2021-07-09 17:55:40,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:40,193 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 3992 transitions. [2021-07-09 17:55:40,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:40,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 3992 transitions. [2021-07-09 17:55:40,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:40,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:40,194 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:40,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-09 17:55:40,404 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:40,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:40,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1940533323, now seen corresponding path program 92 times [2021-07-09 17:55:40,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:40,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261226537] [2021-07-09 17:55:40,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:40,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:40,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261226537] [2021-07-09 17:55:40,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261226537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:40,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657743737] [2021-07-09 17:55:40,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:40,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:55:40,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:40,639 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:40,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:41,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:41,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:41,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:41,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:41,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:41,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:41,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:41,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:41,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:41,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:41,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:41,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:41,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:41,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:41,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:41,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:41,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:41,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:41,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:41,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:41,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:41,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:41,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:41,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:41,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:41,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657743737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:41,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:41,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-07-09 17:55:41,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304739458] [2021-07-09 17:55:41,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:55:41,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:41,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:55:41,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:55:41,147 INFO L87 Difference]: Start difference. First operand 2015 states and 3992 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:41,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:41,717 INFO L93 Difference]: Finished difference Result 3283 states and 6567 transitions. [2021-07-09 17:55:41,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:55:41,717 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:41,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:41,721 INFO L225 Difference]: With dead ends: 3283 [2021-07-09 17:55:41,721 INFO L226 Difference]: Without dead ends: 3078 [2021-07-09 17:55:41,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 742.2ms TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:55:41,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-07-09 17:55:41,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2009. [2021-07-09 17:55:41,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 1.9810756972111554) internal successors, (3978), 2008 states have internal predecessors, (3978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:41,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 3978 transitions. [2021-07-09 17:55:41,745 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 3978 transitions. Word has length 36 [2021-07-09 17:55:41,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:41,746 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 3978 transitions. [2021-07-09 17:55:41,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:41,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 3978 transitions. [2021-07-09 17:55:41,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:41,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:41,748 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:41,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:41,953 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:41,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:41,953 INFO L82 PathProgramCache]: Analyzing trace with hash 518734893, now seen corresponding path program 93 times [2021-07-09 17:55:41,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:41,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766032823] [2021-07-09 17:55:41,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:42,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:42,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766032823] [2021-07-09 17:55:42,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766032823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:42,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045809870] [2021-07-09 17:55:42,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:42,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:55:42,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:42,233 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:42,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:42,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:42,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:42,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:42,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:42,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:42,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:42,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:42,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:42,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:42,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:42,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:42,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:42,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:42,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:42,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:42,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:42,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:42,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:42,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:42,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:42,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:42,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:42,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:42,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:42,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:42,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:42,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:42,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045809870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:42,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:42,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-09 17:55:42,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472782340] [2021-07-09 17:55:42,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:55:42,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:42,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:55:42,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:55:42,721 INFO L87 Difference]: Start difference. First operand 2009 states and 3978 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:43,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:43,155 INFO L93 Difference]: Finished difference Result 2891 states and 5824 transitions. [2021-07-09 17:55:43,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:55:43,155 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:43,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:43,158 INFO L225 Difference]: With dead ends: 2891 [2021-07-09 17:55:43,158 INFO L226 Difference]: Without dead ends: 2834 [2021-07-09 17:55:43,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 608.5ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-07-09 17:55:43,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2006. [2021-07-09 17:55:43,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 1.9810473815461347) internal successors, (3972), 2005 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:43,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 3972 transitions. [2021-07-09 17:55:43,177 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 3972 transitions. Word has length 36 [2021-07-09 17:55:43,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:43,177 INFO L482 AbstractCegarLoop]: Abstraction has 2006 states and 3972 transitions. [2021-07-09 17:55:43,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:43,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 3972 transitions. [2021-07-09 17:55:43,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:43,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:43,179 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:43,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:43,380 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:43,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:43,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1829487763, now seen corresponding path program 94 times [2021-07-09 17:55:43,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:43,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8577821] [2021-07-09 17:55:43,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:43,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:43,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8577821] [2021-07-09 17:55:43,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8577821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:43,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049619366] [2021-07-09 17:55:43,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:43,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:55:43,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:43,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:43,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:44,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:44,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:44,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:44,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:44,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:44,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:44,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:44,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:44,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:44,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:44,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:44,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:44,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:44,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:44,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:44,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:44,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:44,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:44,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:44,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:44,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:44,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:44,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:44,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:44,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:44,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:44,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:44,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049619366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:44,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:44,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-09 17:55:44,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122208998] [2021-07-09 17:55:44,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:55:44,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:44,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:55:44,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:55:44,138 INFO L87 Difference]: Start difference. First operand 2006 states and 3972 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:44,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:44,734 INFO L93 Difference]: Finished difference Result 3270 states and 6540 transitions. [2021-07-09 17:55:44,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:55:44,734 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:44,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:44,738 INFO L225 Difference]: With dead ends: 3270 [2021-07-09 17:55:44,738 INFO L226 Difference]: Without dead ends: 3074 [2021-07-09 17:55:44,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 813.3ms TimeCoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:55:44,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-07-09 17:55:44,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 2030. [2021-07-09 17:55:44,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 1.9817644159684573) internal successors, (4021), 2029 states have internal predecessors, (4021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:44,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 4021 transitions. [2021-07-09 17:55:44,758 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 4021 transitions. Word has length 36 [2021-07-09 17:55:44,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:44,758 INFO L482 AbstractCegarLoop]: Abstraction has 2030 states and 4021 transitions. [2021-07-09 17:55:44,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:44,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 4021 transitions. [2021-07-09 17:55:44,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:44,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:44,760 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:44,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-09 17:55:44,960 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:44,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:44,961 INFO L82 PathProgramCache]: Analyzing trace with hash 407689333, now seen corresponding path program 95 times [2021-07-09 17:55:44,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:44,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336258711] [2021-07-09 17:55:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:45,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:45,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336258711] [2021-07-09 17:55:45,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336258711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:45,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286829435] [2021-07-09 17:55:45,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:45,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:55:45,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:45,263 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:45,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:45,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:45,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:45,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:45,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:45,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:45,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:45,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:45,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:45,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:45,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:45,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:45,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:45,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:45,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:45,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:45,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:45,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:45,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:45,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:45,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:45,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:45,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:45,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:45,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:45,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:45,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:45,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:45,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286829435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:45,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:45,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:55:45,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865532492] [2021-07-09 17:55:45,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:55:45,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:45,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:55:45,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:45,762 INFO L87 Difference]: Start difference. First operand 2030 states and 4021 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:46,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:46,136 INFO L93 Difference]: Finished difference Result 3018 states and 6082 transitions. [2021-07-09 17:55:46,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:55:46,136 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:46,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:46,139 INFO L225 Difference]: With dead ends: 3018 [2021-07-09 17:55:46,139 INFO L226 Difference]: Without dead ends: 2956 [2021-07-09 17:55:46,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 637.8ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:55:46,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2956 states. [2021-07-09 17:55:46,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2956 to 2051. [2021-07-09 17:55:46,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 1.9834146341463414) internal successors, (4066), 2050 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:46,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 4066 transitions. [2021-07-09 17:55:46,158 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 4066 transitions. Word has length 36 [2021-07-09 17:55:46,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:46,159 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 4066 transitions. [2021-07-09 17:55:46,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:46,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 4066 transitions. [2021-07-09 17:55:46,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:46,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:46,160 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:46,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-09 17:55:46,361 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:46,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:46,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1143941907, now seen corresponding path program 96 times [2021-07-09 17:55:46,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:46,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408659399] [2021-07-09 17:55:46,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:46,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:46,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408659399] [2021-07-09 17:55:46,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408659399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:46,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374418798] [2021-07-09 17:55:46,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:46,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:55:46,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:46,643 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 17:55:46,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:47,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:47,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:47,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:47,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:47,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:47,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:47,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:47,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:47,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:47,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:47,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:47,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:47,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:47,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:47,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:47,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:47,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:47,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:47,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:47,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:47,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 37 [2021-07-09 17:55:47,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:47,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:47,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:47,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-07-09 17:55:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:47,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374418798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:47,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:47,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:55:47,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591969895] [2021-07-09 17:55:47,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:55:47,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:47,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:55:47,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:47,161 INFO L87 Difference]: Start difference. First operand 2051 states and 4066 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:47,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:47,484 INFO L93 Difference]: Finished difference Result 2747 states and 5507 transitions. [2021-07-09 17:55:47,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:55:47,484 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:47,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:47,487 INFO L225 Difference]: With dead ends: 2747 [2021-07-09 17:55:47,487 INFO L226 Difference]: Without dead ends: 2724 [2021-07-09 17:55:47,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 628.7ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:55:47,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-07-09 17:55:47,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2051. [2021-07-09 17:55:47,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 1.9834146341463414) internal successors, (4066), 2050 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:47,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 4066 transitions. [2021-07-09 17:55:47,506 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 4066 transitions. Word has length 36 [2021-07-09 17:55:47,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:47,506 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 4066 transitions. [2021-07-09 17:55:47,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:47,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 4066 transitions. [2021-07-09 17:55:47,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:47,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:47,508 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:47,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:47,709 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:47,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:47,709 INFO L82 PathProgramCache]: Analyzing trace with hash 939265351, now seen corresponding path program 97 times [2021-07-09 17:55:47,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:47,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630762778] [2021-07-09 17:55:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:55:48,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:48,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630762778] [2021-07-09 17:55:48,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630762778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:48,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844588529] [2021-07-09 17:55:48,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:48,043 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:48,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:48,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:48,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:48,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:48,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:48,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:48,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:48,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:48,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:48,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:48,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:48,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:48,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:48,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:48,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:48,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:48,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:48,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:48,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:48,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:48,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:48,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:48,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:48,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:48,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:48,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:48,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:48,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844588529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:48,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:48,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-07-09 17:55:48,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571395091] [2021-07-09 17:55:48,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:55:48,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:48,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:55:48,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:55:48,531 INFO L87 Difference]: Start difference. First operand 2051 states and 4066 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:48,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:48,988 INFO L93 Difference]: Finished difference Result 3042 states and 6095 transitions. [2021-07-09 17:55:48,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:55:48,989 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:48,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:48,992 INFO L225 Difference]: With dead ends: 3042 [2021-07-09 17:55:48,992 INFO L226 Difference]: Without dead ends: 2834 [2021-07-09 17:55:48,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 741.3ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:55:48,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-07-09 17:55:49,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2141. [2021-07-09 17:55:49,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2140 states have (on average 1.983177570093458) internal successors, (4244), 2140 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 4244 transitions. [2021-07-09 17:55:49,011 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 4244 transitions. Word has length 36 [2021-07-09 17:55:49,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:49,011 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 4244 transitions. [2021-07-09 17:55:49,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 4244 transitions. [2021-07-09 17:55:49,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:49,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:49,013 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:49,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 17:55:49,214 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:49,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:49,214 INFO L82 PathProgramCache]: Analyzing trace with hash -534706753, now seen corresponding path program 98 times [2021-07-09 17:55:49,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:49,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770774147] [2021-07-09 17:55:49,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:49,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:49,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770774147] [2021-07-09 17:55:49,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770774147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:49,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203800867] [2021-07-09 17:55:49,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:49,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:55:49,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:49,490 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:49,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:49,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:49,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:49,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:49,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:49,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:49,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:49,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:49,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:49,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:49,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:49,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:49,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:49,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:49,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:49,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:49,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:49,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:49,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:49,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:49,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:49,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:49,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:49,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:49,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:49,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:50,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203800867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:50,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:50,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-09 17:55:50,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830187553] [2021-07-09 17:55:50,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:55:50,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:50,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:55:50,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:55:50,008 INFO L87 Difference]: Start difference. First operand 2141 states and 4244 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:50,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:50,369 INFO L93 Difference]: Finished difference Result 3881 states and 7802 transitions. [2021-07-09 17:55:50,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:55:50,369 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:50,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:50,373 INFO L225 Difference]: With dead ends: 3881 [2021-07-09 17:55:50,373 INFO L226 Difference]: Without dead ends: 3816 [2021-07-09 17:55:50,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 632.4ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:50,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-07-09 17:55:50,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 2072. [2021-07-09 17:55:50,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 1.981651376146789) internal successors, (4104), 2071 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:50,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 4104 transitions. [2021-07-09 17:55:50,396 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 4104 transitions. Word has length 36 [2021-07-09 17:55:50,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:50,396 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 4104 transitions. [2021-07-09 17:55:50,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:50,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 4104 transitions. [2021-07-09 17:55:50,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:50,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:50,398 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:50,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 17:55:50,599 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:50,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:50,599 INFO L82 PathProgramCache]: Analyzing trace with hash -501889653, now seen corresponding path program 99 times [2021-07-09 17:55:50,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:50,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753245355] [2021-07-09 17:55:50,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:50,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:50,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753245355] [2021-07-09 17:55:50,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753245355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:50,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760146726] [2021-07-09 17:55:50,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:50,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:55:50,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:50,935 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:50,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:51,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:51,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:51,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:51,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:51,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:51,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:51,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:51,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:51,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:51,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:51,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:51,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:51,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:51,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:51,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:51,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:51,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:51,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:51,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:51,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:51,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:51,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:51,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:51,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:51,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:51,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:51,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:51,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:51,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760146726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:51,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:51,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:55:51,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814792817] [2021-07-09 17:55:51,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:55:51,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:51,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:55:51,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:51,450 INFO L87 Difference]: Start difference. First operand 2072 states and 4104 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:51,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:51,897 INFO L93 Difference]: Finished difference Result 3168 states and 6373 transitions. [2021-07-09 17:55:51,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:55:51,897 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:51,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:51,900 INFO L225 Difference]: With dead ends: 3168 [2021-07-09 17:55:51,900 INFO L226 Difference]: Without dead ends: 3111 [2021-07-09 17:55:51,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 691.8ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:55:51,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-07-09 17:55:51,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 2114. [2021-07-09 17:55:51,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.9820160908660671) internal successors, (4188), 2113 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:51,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 4188 transitions. [2021-07-09 17:55:51,920 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 4188 transitions. Word has length 36 [2021-07-09 17:55:51,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:51,920 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 4188 transitions. [2021-07-09 17:55:51,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:51,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 4188 transitions. [2021-07-09 17:55:51,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:51,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:51,922 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:52,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-09 17:55:52,124 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:52,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:52,124 INFO L82 PathProgramCache]: Analyzing trace with hash -2053520893, now seen corresponding path program 100 times [2021-07-09 17:55:52,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:52,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640900165] [2021-07-09 17:55:52,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:52,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:52,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640900165] [2021-07-09 17:55:52,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640900165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:52,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108658849] [2021-07-09 17:55:52,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:52,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:55:52,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:52,440 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:52,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:52,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:52,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:52,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:52,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:52,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:52,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:52,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:52,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:52,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:52,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:52,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:52,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:52,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:52,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:52,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:52,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:52,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:52,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:52,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:52,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:52,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:52,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:52,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:52,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:52,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:52,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108658849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:52,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:52,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:55:52,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639827734] [2021-07-09 17:55:52,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:55:52,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:52,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:55:52,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:52,977 INFO L87 Difference]: Start difference. First operand 2114 states and 4188 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:53,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:53,354 INFO L93 Difference]: Finished difference Result 2764 states and 5529 transitions. [2021-07-09 17:55:53,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:55:53,355 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:53,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:53,358 INFO L225 Difference]: With dead ends: 2764 [2021-07-09 17:55:53,358 INFO L226 Difference]: Without dead ends: 2741 [2021-07-09 17:55:53,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 685.5ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:55:53,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2021-07-09 17:55:53,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 2114. [2021-07-09 17:55:53,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.9820160908660671) internal successors, (4188), 2113 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:53,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 4188 transitions. [2021-07-09 17:55:53,381 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 4188 transitions. Word has length 36 [2021-07-09 17:55:53,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:53,381 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 4188 transitions. [2021-07-09 17:55:53,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:53,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 4188 transitions. [2021-07-09 17:55:53,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:53,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:53,383 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:53,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:53,589 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:53,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:53,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1050580755, now seen corresponding path program 101 times [2021-07-09 17:55:53,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:53,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527023489] [2021-07-09 17:55:53,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:53,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:53,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527023489] [2021-07-09 17:55:53,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527023489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:53,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156641541] [2021-07-09 17:55:53,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:53,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:55:53,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:53,880 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:53,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:54,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:54,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:54,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:54,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:54,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:54,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:54,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:54,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:54,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:54,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:54,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:54,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:54,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:54,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:54,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:54,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:54,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:54,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:54,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:54,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:54,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:54,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:54,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:54,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:54,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:54,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:54,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156641541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:54,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:54,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:55:54,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246505494] [2021-07-09 17:55:54,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:55:54,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:54,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:55:54,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:54,408 INFO L87 Difference]: Start difference. First operand 2114 states and 4188 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:54,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:54,879 INFO L93 Difference]: Finished difference Result 2775 states and 5552 transitions. [2021-07-09 17:55:54,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:55:54,880 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:54,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:54,883 INFO L225 Difference]: With dead ends: 2775 [2021-07-09 17:55:54,883 INFO L226 Difference]: Without dead ends: 2751 [2021-07-09 17:55:54,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 649.6ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:55:54,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-07-09 17:55:54,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2114. [2021-07-09 17:55:54,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.9820160908660671) internal successors, (4188), 2113 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:54,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 4188 transitions. [2021-07-09 17:55:54,905 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 4188 transitions. Word has length 36 [2021-07-09 17:55:54,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:54,906 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 4188 transitions. [2021-07-09 17:55:54,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:54,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 4188 transitions. [2021-07-09 17:55:54,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:54,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:54,908 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:55,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-09 17:55:55,108 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:55,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:55,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1598664591, now seen corresponding path program 102 times [2021-07-09 17:55:55,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:55,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503873201] [2021-07-09 17:55:55,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:55:55,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:55,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503873201] [2021-07-09 17:55:55,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503873201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:55,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209981797] [2021-07-09 17:55:55,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:55,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:55:55,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:55,373 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-09 17:55:55,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:55,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:55,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:55,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:55,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:55,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:55,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:55,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:55,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:55,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:55,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:55,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:55,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:55,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:55,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:55,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:55,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:55,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:55,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:55,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:55,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:55,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:55,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:55,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:55,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:55,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:55,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209981797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:55,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:55,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-07-09 17:55:55,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801474911] [2021-07-09 17:55:55,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:55:55,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:55,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:55:55,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:55:55,896 INFO L87 Difference]: Start difference. First operand 2114 states and 4188 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:56,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:56,340 INFO L93 Difference]: Finished difference Result 3031 states and 6075 transitions. [2021-07-09 17:55:56,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:55:56,341 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:56,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:56,344 INFO L225 Difference]: With dead ends: 3031 [2021-07-09 17:55:56,344 INFO L226 Difference]: Without dead ends: 2851 [2021-07-09 17:55:56,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 707.4ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:55:56,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-07-09 17:55:56,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2204. [2021-07-09 17:55:56,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.9809350885156605) internal successors, (4364), 2203 states have internal predecessors, (4364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:56,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 4364 transitions. [2021-07-09 17:55:56,364 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 4364 transitions. Word has length 36 [2021-07-09 17:55:56,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:56,364 INFO L482 AbstractCegarLoop]: Abstraction has 2204 states and 4364 transitions. [2021-07-09 17:55:56,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:56,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 4364 transitions. [2021-07-09 17:55:56,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:56,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:56,366 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:56,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-09 17:55:56,566 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:56,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:56,567 INFO L82 PathProgramCache]: Analyzing trace with hash 124692487, now seen corresponding path program 103 times [2021-07-09 17:55:56,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:56,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654824696] [2021-07-09 17:55:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:56,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:56,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654824696] [2021-07-09 17:55:56,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654824696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:56,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648165493] [2021-07-09 17:55:56,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:56,848 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:56,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:57,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:57,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:57,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:57,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:57,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:57,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:57,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:57,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:57,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:57,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:57,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:57,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:57,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:57,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:57,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:57,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:57,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:57,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:57,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:57,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:57,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:57,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:57,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:57,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:57,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:57,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:57,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:57,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:57,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648165493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:57,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:57,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-09 17:55:57,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911351823] [2021-07-09 17:55:57,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:55:57,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:57,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:55:57,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:55:57,350 INFO L87 Difference]: Start difference. First operand 2204 states and 4364 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:57,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:57,702 INFO L93 Difference]: Finished difference Result 3432 states and 6914 transitions. [2021-07-09 17:55:57,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:55:57,702 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:57,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:57,705 INFO L225 Difference]: With dead ends: 3432 [2021-07-09 17:55:57,705 INFO L226 Difference]: Without dead ends: 3379 [2021-07-09 17:55:57,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 642.1ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:57,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3379 states. [2021-07-09 17:55:57,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3379 to 2192. [2021-07-09 17:55:57,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 1.9808306709265175) internal successors, (4340), 2191 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:57,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 4340 transitions. [2021-07-09 17:55:57,728 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 4340 transitions. Word has length 36 [2021-07-09 17:55:57,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:57,729 INFO L482 AbstractCegarLoop]: Abstraction has 2192 states and 4340 transitions. [2021-07-09 17:55:57,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:57,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 4340 transitions. [2021-07-09 17:55:57,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:57,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:57,731 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:57,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:57,931 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:57,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:57,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1579308017, now seen corresponding path program 104 times [2021-07-09 17:55:57,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:57,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810112973] [2021-07-09 17:55:57,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:58,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:58,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810112973] [2021-07-09 17:55:58,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810112973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:58,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175855314] [2021-07-09 17:55:58,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:58,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:55:58,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:58,235 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:58,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:58,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:58,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:58,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:58,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:58,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:58,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:58,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:58,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:58,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:58,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:58,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:58,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:58,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:58,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:58,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:58,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:58,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:58,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:58,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:58,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:58,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:55:58,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:58,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:58,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:58,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:55:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:58,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175855314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:58,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:58,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-09 17:55:58,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544577828] [2021-07-09 17:55:58,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:55:58,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:58,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:55:58,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:55:58,742 INFO L87 Difference]: Start difference. First operand 2192 states and 4340 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:59,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:59,015 INFO L93 Difference]: Finished difference Result 3344 states and 6703 transitions. [2021-07-09 17:55:59,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:55:59,015 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:59,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:59,019 INFO L225 Difference]: With dead ends: 3344 [2021-07-09 17:55:59,019 INFO L226 Difference]: Without dead ends: 3283 [2021-07-09 17:55:59,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 651.3ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:55:59,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-07-09 17:55:59,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2207. [2021-07-09 17:55:59,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2206 states have (on average 1.9805077062556664) internal successors, (4369), 2206 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:59,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 4369 transitions. [2021-07-09 17:55:59,045 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 4369 transitions. Word has length 36 [2021-07-09 17:55:59,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:59,045 INFO L482 AbstractCegarLoop]: Abstraction has 2207 states and 4369 transitions. [2021-07-09 17:55:59,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:59,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 4369 transitions. [2021-07-09 17:55:59,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:59,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:59,047 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:59,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:59,247 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:59,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:59,248 INFO L82 PathProgramCache]: Analyzing trace with hash 157509587, now seen corresponding path program 105 times [2021-07-09 17:55:59,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:59,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013032718] [2021-07-09 17:55:59,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:59,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:59,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013032718] [2021-07-09 17:55:59,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013032718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:59,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600148574] [2021-07-09 17:55:59,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:59,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:55:59,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:59,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:55:59,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:00,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:00,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:00,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:00,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:00,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:00,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:00,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:00,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:00,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:00,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:00,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:00,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:00,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:00,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:00,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:00,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:00,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:00,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:00,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:00,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:00,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:00,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:00,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:00,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:00,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:00,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:00,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:00,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:00,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600148574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:00,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:00,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:56:00,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485196980] [2021-07-09 17:56:00,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:56:00,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:00,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:56:00,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:56:00,063 INFO L87 Difference]: Start difference. First operand 2207 states and 4369 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:00,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:00,562 INFO L93 Difference]: Finished difference Result 3254 states and 6538 transitions. [2021-07-09 17:56:00,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:56:00,562 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:00,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:00,566 INFO L225 Difference]: With dead ends: 3254 [2021-07-09 17:56:00,566 INFO L226 Difference]: Without dead ends: 3197 [2021-07-09 17:56:00,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 656.3ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:56:00,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2021-07-09 17:56:00,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 2195. [2021-07-09 17:56:00,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 1.980401093892434) internal successors, (4345), 2194 states have internal predecessors, (4345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:00,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 4345 transitions. [2021-07-09 17:56:00,598 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 4345 transitions. Word has length 36 [2021-07-09 17:56:00,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:00,599 INFO L482 AbstractCegarLoop]: Abstraction has 2195 states and 4345 transitions. [2021-07-09 17:56:00,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 4345 transitions. [2021-07-09 17:56:00,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:00,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:00,600 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:00,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:00,818 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:00,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:00,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1394121653, now seen corresponding path program 106 times [2021-07-09 17:56:00,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:00,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152238195] [2021-07-09 17:56:00,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:01,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:01,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152238195] [2021-07-09 17:56:01,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152238195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:01,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446877105] [2021-07-09 17:56:01,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:01,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:56:01,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:01,108 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:01,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:01,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:01,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:01,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:01,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:01,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:01,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:01,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:01,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:01,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:01,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:01,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:01,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:01,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:01,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:01,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:01,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:01,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:01,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:01,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:01,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:01,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:01,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:01,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:01,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:01,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:01,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446877105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:01,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:01,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:56:01,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417623712] [2021-07-09 17:56:01,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:56:01,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:01,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:56:01,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:56:01,673 INFO L87 Difference]: Start difference. First operand 2195 states and 4345 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:02,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:02,043 INFO L93 Difference]: Finished difference Result 2867 states and 5731 transitions. [2021-07-09 17:56:02,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:56:02,043 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:02,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:02,046 INFO L225 Difference]: With dead ends: 2867 [2021-07-09 17:56:02,046 INFO L226 Difference]: Without dead ends: 2844 [2021-07-09 17:56:02,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 676.9ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:56:02,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2844 states. [2021-07-09 17:56:02,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2844 to 2204. [2021-07-09 17:56:02,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.9804811620517475) internal successors, (4363), 2203 states have internal predecessors, (4363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:02,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 4363 transitions. [2021-07-09 17:56:02,065 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 4363 transitions. Word has length 36 [2021-07-09 17:56:02,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:02,066 INFO L482 AbstractCegarLoop]: Abstraction has 2204 states and 4363 transitions. [2021-07-09 17:56:02,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:02,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 4363 transitions. [2021-07-09 17:56:02,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:02,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:02,068 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:02,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:02,289 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:02,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:02,290 INFO L82 PathProgramCache]: Analyzing trace with hash -391181515, now seen corresponding path program 107 times [2021-07-09 17:56:02,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:02,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163059112] [2021-07-09 17:56:02,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:02,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:02,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163059112] [2021-07-09 17:56:02,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163059112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:02,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897925946] [2021-07-09 17:56:02,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:02,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:56:02,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:02,571 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:02,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:03,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:03,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:03,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:03,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:03,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:03,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:03,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:03,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:03,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:03,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:03,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:03,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:03,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:03,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:03,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:03,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:03,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:03,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:03,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:03,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:03,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:03,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:03,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:03,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:03,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:03,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:03,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:03,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:03,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897925946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:03,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:03,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:56:03,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344905125] [2021-07-09 17:56:03,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:56:03,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:03,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:56:03,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:56:03,105 INFO L87 Difference]: Start difference. First operand 2204 states and 4363 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:03,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:03,579 INFO L93 Difference]: Finished difference Result 2878 states and 5754 transitions. [2021-07-09 17:56:03,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:56:03,580 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:03,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:03,583 INFO L225 Difference]: With dead ends: 2878 [2021-07-09 17:56:03,583 INFO L226 Difference]: Without dead ends: 2854 [2021-07-09 17:56:03,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 642.1ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:56:03,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-07-09 17:56:03,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2204. [2021-07-09 17:56:03,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.9804811620517475) internal successors, (4363), 2203 states have internal predecessors, (4363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:03,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 4363 transitions. [2021-07-09 17:56:03,602 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 4363 transitions. Word has length 36 [2021-07-09 17:56:03,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:03,602 INFO L482 AbstractCegarLoop]: Abstraction has 2204 states and 4363 transitions. [2021-07-09 17:56:03,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:03,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 4363 transitions. [2021-07-09 17:56:03,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:03,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:03,604 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:03,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-09 17:56:03,805 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:03,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:03,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1155151443, now seen corresponding path program 108 times [2021-07-09 17:56:03,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:03,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120140560] [2021-07-09 17:56:03,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:04,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:04,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120140560] [2021-07-09 17:56:04,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120140560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:04,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969366678] [2021-07-09 17:56:04,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:04,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:56:04,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:04,078 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 17:56:04,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:04,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:04,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:04,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:04,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:04,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:04,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:04,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:04,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:04,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:04,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:04,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:04,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:04,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:04,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:04,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:04,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:04,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:04,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:04,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:04,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:04,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:04,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:04,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:04,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:04,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:04,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969366678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:04,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:04,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:56:04,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666819835] [2021-07-09 17:56:04,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:56:04,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:04,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:56:04,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:56:04,617 INFO L87 Difference]: Start difference. First operand 2204 states and 4363 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:05,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:05,101 INFO L93 Difference]: Finished difference Result 3075 states and 6179 transitions. [2021-07-09 17:56:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:56:05,101 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:05,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:05,104 INFO L225 Difference]: With dead ends: 3075 [2021-07-09 17:56:05,104 INFO L226 Difference]: Without dead ends: 2931 [2021-07-09 17:56:05,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 636.8ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:56:05,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2931 states. [2021-07-09 17:56:05,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2931 to 2247. [2021-07-09 17:56:05,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 1.9821905609973285) internal successors, (4452), 2246 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:05,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 4452 transitions. [2021-07-09 17:56:05,124 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 4452 transitions. Word has length 36 [2021-07-09 17:56:05,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:05,124 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 4452 transitions. [2021-07-09 17:56:05,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:05,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 4452 transitions. [2021-07-09 17:56:05,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:05,126 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:05,126 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:05,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-09 17:56:05,327 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:05,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:05,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1735088919, now seen corresponding path program 109 times [2021-07-09 17:56:05,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:05,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824786006] [2021-07-09 17:56:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:05,622 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:56:05,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:05,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824786006] [2021-07-09 17:56:05,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824786006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:05,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710317842] [2021-07-09 17:56:05,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:05,661 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:05,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:06,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:06,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:06,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:06,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:06,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:06,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:06,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:06,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:06,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:06,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:06,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:06,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:06,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:06,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:06,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:06,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:06,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:06,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:06,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:06,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:06,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:06,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:06,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:06,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:06,207 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:06,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710317842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:06,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:06,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-09 17:56:06,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310965641] [2021-07-09 17:56:06,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:56:06,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:06,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:56:06,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:56:06,208 INFO L87 Difference]: Start difference. First operand 2247 states and 4452 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:06,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:06,842 INFO L93 Difference]: Finished difference Result 4634 states and 9317 transitions. [2021-07-09 17:56:06,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:56:06,843 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:06,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:06,848 INFO L225 Difference]: With dead ends: 4634 [2021-07-09 17:56:06,848 INFO L226 Difference]: Without dead ends: 4591 [2021-07-09 17:56:06,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 794.8ms TimeCoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:56:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2021-07-09 17:56:06,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 2286. [2021-07-09 17:56:06,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2285 states have (on average 1.9785557986870896) internal successors, (4521), 2285 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:06,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 4521 transitions. [2021-07-09 17:56:06,876 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 4521 transitions. Word has length 36 [2021-07-09 17:56:06,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:06,877 INFO L482 AbstractCegarLoop]: Abstraction has 2286 states and 4521 transitions. [2021-07-09 17:56:06,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:06,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 4521 transitions. [2021-07-09 17:56:06,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:06,879 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:06,879 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:07,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-09 17:56:07,079 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:07,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:07,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1139316895, now seen corresponding path program 110 times [2021-07-09 17:56:07,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:07,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803833051] [2021-07-09 17:56:07,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:07,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:07,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803833051] [2021-07-09 17:56:07,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803833051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:07,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054719686] [2021-07-09 17:56:07,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:07,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:56:07,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:07,348 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 17:56:07,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:07,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:07,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:07,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:07,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:07,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:07,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:07,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:07,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:07,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:07,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:07,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:07,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:07,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:07,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:07,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:07,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:07,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 37 [2021-07-09 17:56:07,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:07,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:07,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:07,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-07-09 17:56:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:07,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054719686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:07,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:07,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:56:07,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114431319] [2021-07-09 17:56:07,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:56:07,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:07,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:56:07,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:56:07,854 INFO L87 Difference]: Start difference. First operand 2286 states and 4521 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:08,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:08,473 INFO L93 Difference]: Finished difference Result 4423 states and 8911 transitions. [2021-07-09 17:56:08,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:56:08,474 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:08,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:08,479 INFO L225 Difference]: With dead ends: 4423 [2021-07-09 17:56:08,479 INFO L226 Difference]: Without dead ends: 4375 [2021-07-09 17:56:08,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 731.2ms TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:56:08,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4375 states. [2021-07-09 17:56:08,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4375 to 2331. [2021-07-09 17:56:08,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 1.978969957081545) internal successors, (4611), 2330 states have internal predecessors, (4611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:08,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 4611 transitions. [2021-07-09 17:56:08,505 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 4611 transitions. Word has length 36 [2021-07-09 17:56:08,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:08,505 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 4611 transitions. [2021-07-09 17:56:08,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:08,505 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 4611 transitions. [2021-07-09 17:56:08,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:08,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:08,509 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:08,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:08,729 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:08,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:08,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1250362455, now seen corresponding path program 111 times [2021-07-09 17:56:08,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:08,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352222014] [2021-07-09 17:56:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:08,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:08,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352222014] [2021-07-09 17:56:08,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352222014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:08,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930014548] [2021-07-09 17:56:08,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:09,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:56:09,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:09,008 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:09,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:09,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:09,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:09,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:09,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:09,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:09,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:09,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:09,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:09,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:09,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:09,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:09,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:09,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:09,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:09,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:09,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:09,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:09,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:09,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:09,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:09,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:09,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:09,498 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:09,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930014548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:09,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:09,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:56:09,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005315039] [2021-07-09 17:56:09,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:56:09,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:09,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:56:09,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:56:09,532 INFO L87 Difference]: Start difference. First operand 2331 states and 4611 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:10,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:10,257 INFO L93 Difference]: Finished difference Result 4274 states and 8601 transitions. [2021-07-09 17:56:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:56:10,257 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:10,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:10,262 INFO L225 Difference]: With dead ends: 4274 [2021-07-09 17:56:10,262 INFO L226 Difference]: Without dead ends: 4231 [2021-07-09 17:56:10,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 790.3ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:56:10,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2021-07-09 17:56:10,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 2382. [2021-07-09 17:56:10,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2381 states have (on average 1.9794204115917682) internal successors, (4713), 2381 states have internal predecessors, (4713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:10,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 4713 transitions. [2021-07-09 17:56:10,288 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 4713 transitions. Word has length 36 [2021-07-09 17:56:10,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:10,288 INFO L482 AbstractCegarLoop]: Abstraction has 2382 states and 4713 transitions. [2021-07-09 17:56:10,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:10,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 4713 transitions. [2021-07-09 17:56:10,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:10,290 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:10,290 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:10,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-09 17:56:10,491 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:10,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:10,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1492973601, now seen corresponding path program 112 times [2021-07-09 17:56:10,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:10,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304448297] [2021-07-09 17:56:10,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:10,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:10,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304448297] [2021-07-09 17:56:10,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304448297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:10,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770735754] [2021-07-09 17:56:10,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:10,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:56:10,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:10,793 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:10,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:11,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:11,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:11,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:11,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:11,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:11,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:11,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:11,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:11,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:11,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:11,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:11,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:11,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:11,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:11,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:11,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:11,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:11,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:11,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:11,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:11,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:11,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770735754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:11,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:11,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 17:56:11,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108219862] [2021-07-09 17:56:11,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:56:11,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:11,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:56:11,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:56:11,313 INFO L87 Difference]: Start difference. First operand 2382 states and 4713 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:12,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:12,102 INFO L93 Difference]: Finished difference Result 4262 states and 8590 transitions. [2021-07-09 17:56:12,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:56:12,103 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:12,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:12,108 INFO L225 Difference]: With dead ends: 4262 [2021-07-09 17:56:12,108 INFO L226 Difference]: Without dead ends: 4200 [2021-07-09 17:56:12,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 830.6ms TimeCoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:56:12,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4200 states. [2021-07-09 17:56:12,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4200 to 2372. [2021-07-09 17:56:12,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 2371 states have (on average 1.9801771404470687) internal successors, (4695), 2371 states have internal predecessors, (4695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:12,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 4695 transitions. [2021-07-09 17:56:12,135 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 4695 transitions. Word has length 36 [2021-07-09 17:56:12,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:12,135 INFO L482 AbstractCegarLoop]: Abstraction has 2372 states and 4695 transitions. [2021-07-09 17:56:12,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:12,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 4695 transitions. [2021-07-09 17:56:12,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:12,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:12,137 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:12,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:12,338 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:12,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:12,338 INFO L82 PathProgramCache]: Analyzing trace with hash 140658571, now seen corresponding path program 113 times [2021-07-09 17:56:12,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:12,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69269462] [2021-07-09 17:56:12,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:12,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:12,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69269462] [2021-07-09 17:56:12,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69269462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:12,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720343404] [2021-07-09 17:56:12,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:12,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:56:12,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:12,620 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-09 17:56:12,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:13,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:13,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:13,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:13,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:13,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:13,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:13,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:13,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:13,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:13,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:13,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:13,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:13,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:13,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:13,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:13,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:13,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:13,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:13,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:13,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:13,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:13,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:13,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:13,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:13,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:13,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-07-09 17:56:13,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:13,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:13,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:13,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-07-09 17:56:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:13,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720343404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:13,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:13,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-07-09 17:56:13,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973240376] [2021-07-09 17:56:13,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 17:56:13,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:13,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 17:56:13,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:56:13,219 INFO L87 Difference]: Start difference. First operand 2372 states and 4695 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:14,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:14,687 INFO L93 Difference]: Finished difference Result 3919 states and 7823 transitions. [2021-07-09 17:56:14,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:56:14,687 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:14,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:14,691 INFO L225 Difference]: With dead ends: 3919 [2021-07-09 17:56:14,691 INFO L226 Difference]: Without dead ends: 3722 [2021-07-09 17:56:14,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1376.5ms TimeCoverageRelationStatistics Valid=184, Invalid=2168, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:56:14,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2021-07-09 17:56:14,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 2432. [2021-07-09 17:56:14,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2431 states have (on average 1.9819004524886878) internal successors, (4818), 2431 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:14,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 4818 transitions. [2021-07-09 17:56:14,715 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 4818 transitions. Word has length 36 [2021-07-09 17:56:14,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:14,715 INFO L482 AbstractCegarLoop]: Abstraction has 2432 states and 4818 transitions. [2021-07-09 17:56:14,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:14,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 4818 transitions. [2021-07-09 17:56:14,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:14,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:14,717 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:14,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-09 17:56:14,917 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:14,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:14,918 INFO L82 PathProgramCache]: Analyzing trace with hash -768920415, now seen corresponding path program 114 times [2021-07-09 17:56:14,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:14,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704923555] [2021-07-09 17:56:14,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:15,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:15,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704923555] [2021-07-09 17:56:15,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704923555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:15,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637286503] [2021-07-09 17:56:15,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:15,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:56:15,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:15,213 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 17:56:15,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:15,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:15,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:15,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:15,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:15,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:15,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:15,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:15,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:15,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:15,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:15,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:15,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:15,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:15,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:15,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:15,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:15,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:15,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:15,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:15,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:15,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:15,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:15,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637286503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:15,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:15,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-07-09 17:56:15,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195579959] [2021-07-09 17:56:15,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:56:15,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:15,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:56:15,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:56:15,707 INFO L87 Difference]: Start difference. First operand 2432 states and 4818 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:16,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:16,224 INFO L93 Difference]: Finished difference Result 3994 states and 7991 transitions. [2021-07-09 17:56:16,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:56:16,225 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:16,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:16,229 INFO L225 Difference]: With dead ends: 3994 [2021-07-09 17:56:16,229 INFO L226 Difference]: Without dead ends: 3807 [2021-07-09 17:56:16,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 647.3ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:56:16,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-07-09 17:56:16,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 2486. [2021-07-09 17:56:16,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 1.9847082494969819) internal successors, (4932), 2485 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 4932 transitions. [2021-07-09 17:56:16,252 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 4932 transitions. Word has length 36 [2021-07-09 17:56:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:16,253 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 4932 transitions. [2021-07-09 17:56:16,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 4932 transitions. [2021-07-09 17:56:16,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:16,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:16,255 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:16,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:16,455 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:16,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:16,455 INFO L82 PathProgramCache]: Analyzing trace with hash 234019723, now seen corresponding path program 115 times [2021-07-09 17:56:16,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:16,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072948584] [2021-07-09 17:56:16,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:16,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:16,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072948584] [2021-07-09 17:56:16,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072948584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:16,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340588391] [2021-07-09 17:56:16,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:16,732 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:16,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:17,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:17,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:17,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:17,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:17,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:17,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:17,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:17,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:17,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:17,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:17,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:17,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:17,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:17,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:17,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:17,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:17,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:17,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:17,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:17,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:17,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:17,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:17,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:17,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:17,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340588391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:17,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:17,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-07-09 17:56:17,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837195105] [2021-07-09 17:56:17,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:56:17,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:17,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:56:17,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:56:17,217 INFO L87 Difference]: Start difference. First operand 2486 states and 4932 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:17,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:17,829 INFO L93 Difference]: Finished difference Result 3663 states and 7313 transitions. [2021-07-09 17:56:17,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:56:17,829 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:17,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:17,833 INFO L225 Difference]: With dead ends: 3663 [2021-07-09 17:56:17,833 INFO L226 Difference]: Without dead ends: 3639 [2021-07-09 17:56:17,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 621.2ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:56:17,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2021-07-09 17:56:17,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 2486. [2021-07-09 17:56:17,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 1.9847082494969819) internal successors, (4932), 2485 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:17,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 4932 transitions. [2021-07-09 17:56:17,860 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 4932 transitions. Word has length 36 [2021-07-09 17:56:17,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:17,860 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 4932 transitions. [2021-07-09 17:56:17,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:17,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 4932 transitions. [2021-07-09 17:56:17,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:17,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:17,863 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:18,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:18,084 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:18,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:18,084 INFO L82 PathProgramCache]: Analyzing trace with hash 726123041, now seen corresponding path program 116 times [2021-07-09 17:56:18,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:18,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104847733] [2021-07-09 17:56:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:56:18,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:18,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104847733] [2021-07-09 17:56:18,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104847733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:18,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975895795] [2021-07-09 17:56:18,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:18,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:56:18,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:18,432 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:18,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:18,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:18,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:18,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:18,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:18,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:18,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:18,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:18,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:18,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:18,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:18,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:18,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:18,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:18,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:18,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:18,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:18,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:18,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:18,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:18,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:18,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:18,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:18,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:18,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:18,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975895795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:18,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:18,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 27 [2021-07-09 17:56:18,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521946217] [2021-07-09 17:56:18,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:56:18,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:18,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:56:18,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:56:18,881 INFO L87 Difference]: Start difference. First operand 2486 states and 4932 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:19,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:19,295 INFO L93 Difference]: Finished difference Result 3578 states and 7155 transitions. [2021-07-09 17:56:19,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:56:19,296 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:19,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:19,300 INFO L225 Difference]: With dead ends: 3578 [2021-07-09 17:56:19,300 INFO L226 Difference]: Without dead ends: 3364 [2021-07-09 17:56:19,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 704.9ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:56:19,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2021-07-09 17:56:19,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 2624. [2021-07-09 17:56:19,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 1.9797941288600838) internal successors, (5193), 2623 states have internal predecessors, (5193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:19,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 5193 transitions. [2021-07-09 17:56:19,326 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 5193 transitions. Word has length 36 [2021-07-09 17:56:19,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:19,326 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 5193 transitions. [2021-07-09 17:56:19,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:19,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 5193 transitions. [2021-07-09 17:56:19,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:19,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:19,328 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:19,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-07-09 17:56:19,529 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:19,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:19,529 INFO L82 PathProgramCache]: Analyzing trace with hash 144742215, now seen corresponding path program 117 times [2021-07-09 17:56:19,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:19,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740339649] [2021-07-09 17:56:19,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:56:19,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:19,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740339649] [2021-07-09 17:56:19,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740339649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:19,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632007538] [2021-07-09 17:56:19,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:19,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:56:19,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:19,773 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:19,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:20,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:20,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:20,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:20,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:20,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:20,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:20,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:20,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:20,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:20,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:20,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:20,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:20,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:20,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:20,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:20,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:20,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:20,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:20,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:20,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:20,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:20,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:20,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:20,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:20,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:20,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:20,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:20,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632007538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:20,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:20,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 26 [2021-07-09 17:56:20,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088626524] [2021-07-09 17:56:20,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:56:20,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:20,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:56:20,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:56:20,212 INFO L87 Difference]: Start difference. First operand 2624 states and 5193 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:20,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:20,669 INFO L93 Difference]: Finished difference Result 3703 states and 7416 transitions. [2021-07-09 17:56:20,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:56:20,669 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:20,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:20,673 INFO L225 Difference]: With dead ends: 3703 [2021-07-09 17:56:20,673 INFO L226 Difference]: Without dead ends: 3490 [2021-07-09 17:56:20,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 634.1ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:56:20,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2021-07-09 17:56:20,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 2501. [2021-07-09 17:56:20,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2500 states have (on average 1.982) internal successors, (4955), 2500 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 4955 transitions. [2021-07-09 17:56:20,697 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 4955 transitions. Word has length 36 [2021-07-09 17:56:20,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:20,697 INFO L482 AbstractCegarLoop]: Abstraction has 2501 states and 4955 transitions. [2021-07-09 17:56:20,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:20,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 4955 transitions. [2021-07-09 17:56:20,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:20,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:20,699 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:20,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-09 17:56:20,900 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:20,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:20,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1446923267, now seen corresponding path program 118 times [2021-07-09 17:56:20,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:20,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090965325] [2021-07-09 17:56:20,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:21,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:21,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090965325] [2021-07-09 17:56:21,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090965325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:21,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783788854] [2021-07-09 17:56:21,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:21,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:56:21,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:21,240 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:21,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:21,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:21,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:21,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:21,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:21,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:21,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:21,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:21,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:21,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:21,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:21,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:21,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:21,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:21,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:21,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:21,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:21,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:21,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:21,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:21,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:21,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:21,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783788854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:21,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:21,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-07-09 17:56:21,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623764390] [2021-07-09 17:56:21,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:56:21,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:21,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:56:21,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:56:21,718 INFO L87 Difference]: Start difference. First operand 2501 states and 4955 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:22,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:22,338 INFO L93 Difference]: Finished difference Result 3628 states and 7297 transitions. [2021-07-09 17:56:22,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:56:22,338 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:22,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:22,342 INFO L225 Difference]: With dead ends: 3628 [2021-07-09 17:56:22,342 INFO L226 Difference]: Without dead ends: 3563 [2021-07-09 17:56:22,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 669.3ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:56:22,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-07-09 17:56:22,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 2501. [2021-07-09 17:56:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2500 states have (on average 1.982) internal successors, (4955), 2500 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:22,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 4955 transitions. [2021-07-09 17:56:22,366 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 4955 transitions. Word has length 36 [2021-07-09 17:56:22,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:22,366 INFO L482 AbstractCegarLoop]: Abstraction has 2501 states and 4955 transitions. [2021-07-09 17:56:22,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:22,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 4955 transitions. [2021-07-09 17:56:22,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:22,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:22,368 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:22,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:22,569 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:22,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:22,569 INFO L82 PathProgramCache]: Analyzing trace with hash 537344281, now seen corresponding path program 119 times [2021-07-09 17:56:22,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:22,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159197454] [2021-07-09 17:56:22,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:22,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:22,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159197454] [2021-07-09 17:56:22,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159197454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:22,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388120067] [2021-07-09 17:56:22,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:22,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:56:22,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:22,896 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-09 17:56:22,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:23,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:23,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:23,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:23,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:23,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:23,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:23,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:23,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:23,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:23,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:23,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:23,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:23,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:23,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:23,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:23,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:23,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:23,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:23,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:23,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:23,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:23,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:23,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:23,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:23,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:23,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-07-09 17:56:23,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:23,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:23,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:23,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-07-09 17:56:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:23,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388120067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:23,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:23,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-07-09 17:56:23,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159429832] [2021-07-09 17:56:23,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 17:56:23,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:23,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 17:56:23,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:56:23,506 INFO L87 Difference]: Start difference. First operand 2501 states and 4955 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:25,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:25,044 INFO L93 Difference]: Finished difference Result 3874 states and 7764 transitions. [2021-07-09 17:56:25,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:56:25,045 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:25,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:25,049 INFO L225 Difference]: With dead ends: 3874 [2021-07-09 17:56:25,049 INFO L226 Difference]: Without dead ends: 3713 [2021-07-09 17:56:25,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1611.3ms TimeCoverageRelationStatistics Valid=214, Invalid=2648, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 17:56:25,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3713 states. [2021-07-09 17:56:25,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3713 to 2540. [2021-07-09 17:56:25,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 1.9838519102008665) internal successors, (5037), 2539 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:25,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 5037 transitions. [2021-07-09 17:56:25,073 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 5037 transitions. Word has length 36 [2021-07-09 17:56:25,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:25,073 INFO L482 AbstractCegarLoop]: Abstraction has 2540 states and 5037 transitions. [2021-07-09 17:56:25,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:25,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 5037 transitions. [2021-07-09 17:56:25,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:25,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:25,075 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:25,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-09 17:56:25,276 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:25,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:25,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1540284419, now seen corresponding path program 120 times [2021-07-09 17:56:25,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:25,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012938475] [2021-07-09 17:56:25,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:25,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:25,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012938475] [2021-07-09 17:56:25,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012938475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:25,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363172540] [2021-07-09 17:56:25,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:25,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:56:25,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:25,552 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:25,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:26,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:26,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:26,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:26,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:26,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:26,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:26,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:26,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:26,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:26,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:26,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:26,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:26,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:26,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:26,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:26,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:26,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:26,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:26,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:26,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:26,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:26,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:26,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:26,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:26,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363172540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:26,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:26,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-07-09 17:56:26,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649715620] [2021-07-09 17:56:26,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:56:26,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:26,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:56:26,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:56:26,059 INFO L87 Difference]: Start difference. First operand 2540 states and 5037 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:26,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:26,507 INFO L93 Difference]: Finished difference Result 3517 states and 7032 transitions. [2021-07-09 17:56:26,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:56:26,507 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:26,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:26,511 INFO L225 Difference]: With dead ends: 3517 [2021-07-09 17:56:26,511 INFO L226 Difference]: Without dead ends: 3493 [2021-07-09 17:56:26,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 634.1ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:56:26,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3493 states. [2021-07-09 17:56:26,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3493 to 2540. [2021-07-09 17:56:26,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 1.9838519102008665) internal successors, (5037), 2539 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 5037 transitions. [2021-07-09 17:56:26,535 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 5037 transitions. Word has length 36 [2021-07-09 17:56:26,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:26,535 INFO L482 AbstractCegarLoop]: Abstraction has 2540 states and 5037 transitions. [2021-07-09 17:56:26,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:26,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 5037 transitions. [2021-07-09 17:56:26,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:26,537 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:26,537 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:26,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:26,737 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:26,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:26,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1196743521, now seen corresponding path program 121 times [2021-07-09 17:56:26,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:26,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724461255] [2021-07-09 17:56:26,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:27,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:27,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724461255] [2021-07-09 17:56:27,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724461255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:27,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325215688] [2021-07-09 17:56:27,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:27,030 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:27,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:27,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:27,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:27,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:27,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:27,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:27,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:27,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:27,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:27,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:27,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:27,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:27,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:27,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:27,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:27,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:27,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:27,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:27,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:27,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:27,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:27,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:27,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:27,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:27,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:27,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325215688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:27,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:27,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-07-09 17:56:27,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204528314] [2021-07-09 17:56:27,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:56:27,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:27,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:56:27,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:56:27,519 INFO L87 Difference]: Start difference. First operand 2540 states and 5037 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:28,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:28,035 INFO L93 Difference]: Finished difference Result 3604 states and 7227 transitions. [2021-07-09 17:56:28,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:56:28,036 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:28,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:28,039 INFO L225 Difference]: With dead ends: 3604 [2021-07-09 17:56:28,039 INFO L226 Difference]: Without dead ends: 3560 [2021-07-09 17:56:28,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 651.9ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:56:28,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3560 states. [2021-07-09 17:56:28,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3560 to 2534. [2021-07-09 17:56:28,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 1.9838136596920648) internal successors, (5025), 2533 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:28,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 5025 transitions. [2021-07-09 17:56:28,063 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 5025 transitions. Word has length 36 [2021-07-09 17:56:28,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:28,063 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 5025 transitions. [2021-07-09 17:56:28,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:28,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 5025 transitions. [2021-07-09 17:56:28,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:28,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:28,065 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:28,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-09 17:56:28,268 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:28,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:28,268 INFO L82 PathProgramCache]: Analyzing trace with hash -2095283637, now seen corresponding path program 122 times [2021-07-09 17:56:28,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:28,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674434653] [2021-07-09 17:56:28,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:28,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:28,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674434653] [2021-07-09 17:56:28,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674434653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:28,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445981719] [2021-07-09 17:56:28,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:28,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:56:28,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:28,556 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:28,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:29,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:29,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:29,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:29,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:29,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:29,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:29,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:29,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:29,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:29,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:29,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:29,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:29,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:29,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:29,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:29,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:29,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:29,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:29,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:29,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:29,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:29,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:29,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:29,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445981719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:29,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:29,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-07-09 17:56:29,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240708225] [2021-07-09 17:56:29,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:56:29,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:29,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:56:29,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:56:29,057 INFO L87 Difference]: Start difference. First operand 2534 states and 5025 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:29,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:29,781 INFO L93 Difference]: Finished difference Result 3514 states and 7026 transitions. [2021-07-09 17:56:29,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:56:29,781 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:29,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:29,785 INFO L225 Difference]: With dead ends: 3514 [2021-07-09 17:56:29,785 INFO L226 Difference]: Without dead ends: 3490 [2021-07-09 17:56:29,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 645.0ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:56:29,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2021-07-09 17:56:29,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 2531. [2021-07-09 17:56:29,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2530 states have (on average 1.9837944664031621) internal successors, (5019), 2530 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:29,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 5019 transitions. [2021-07-09 17:56:29,810 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 5019 transitions. Word has length 36 [2021-07-09 17:56:29,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:29,810 INFO L482 AbstractCegarLoop]: Abstraction has 2531 states and 5019 transitions. [2021-07-09 17:56:29,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:29,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 5019 transitions. [2021-07-09 17:56:29,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:29,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:29,812 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:30,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:30,014 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:30,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:30,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1435713731, now seen corresponding path program 123 times [2021-07-09 17:56:30,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:30,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197140008] [2021-07-09 17:56:30,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:30,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:30,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197140008] [2021-07-09 17:56:30,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197140008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:30,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100631902] [2021-07-09 17:56:30,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:30,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:56:30,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:30,293 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:30,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:30,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:30,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:30,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:30,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:30,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:30,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:30,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:30,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:30,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:30,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:30,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:30,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:30,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:30,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:30,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:30,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:30,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:30,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:30,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:30,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:30,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:30,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:30,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:30,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:30,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100631902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:30,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:30,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-07-09 17:56:30,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275879580] [2021-07-09 17:56:30,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:56:30,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:30,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:56:30,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:56:30,798 INFO L87 Difference]: Start difference. First operand 2531 states and 5019 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:31,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:31,441 INFO L93 Difference]: Finished difference Result 3529 states and 7060 transitions. [2021-07-09 17:56:31,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:56:31,441 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:31,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:31,454 INFO L225 Difference]: With dead ends: 3529 [2021-07-09 17:56:31,454 INFO L226 Difference]: Without dead ends: 3504 [2021-07-09 17:56:31,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 641.2ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:56:31,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3504 states. [2021-07-09 17:56:31,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3504 to 2534. [2021-07-09 17:56:31,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 1.9838136596920648) internal successors, (5025), 2533 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 5025 transitions. [2021-07-09 17:56:31,477 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 5025 transitions. Word has length 36 [2021-07-09 17:56:31,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:31,477 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 5025 transitions. [2021-07-09 17:56:31,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:31,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 5025 transitions. [2021-07-09 17:56:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:31,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:31,479 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:31,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-09 17:56:31,680 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:31,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:31,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1768497397, now seen corresponding path program 124 times [2021-07-09 17:56:31,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:31,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934367982] [2021-07-09 17:56:31,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:56:31,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:31,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934367982] [2021-07-09 17:56:31,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934367982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:31,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443359197] [2021-07-09 17:56:31,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:32,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:56:32,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:32,036 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:32,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:32,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:32,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:32,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:32,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:32,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:32,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:32,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:32,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:32,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:32,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:32,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:32,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:32,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:32,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:32,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:32,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:32,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:32,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:32,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:32,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443359197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:32,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:32,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-07-09 17:56:32,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53300133] [2021-07-09 17:56:32,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:56:32,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:32,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:56:32,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:56:32,537 INFO L87 Difference]: Start difference. First operand 2534 states and 5025 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:33,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:33,022 INFO L93 Difference]: Finished difference Result 3439 states and 6862 transitions. [2021-07-09 17:56:33,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:56:33,022 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:33,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:33,026 INFO L225 Difference]: With dead ends: 3439 [2021-07-09 17:56:33,026 INFO L226 Difference]: Without dead ends: 3280 [2021-07-09 17:56:33,026 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 789.0ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:56:33,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-07-09 17:56:33,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2606. [2021-07-09 17:56:33,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 2605 states have (on average 1.982341650671785) internal successors, (5164), 2605 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:33,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 5164 transitions. [2021-07-09 17:56:33,049 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 5164 transitions. Word has length 36 [2021-07-09 17:56:33,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:33,050 INFO L482 AbstractCegarLoop]: Abstraction has 2606 states and 5164 transitions. [2021-07-09 17:56:33,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:33,050 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 5164 transitions. [2021-07-09 17:56:33,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:33,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:33,052 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:33,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-09 17:56:33,252 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:33,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:33,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1516299603, now seen corresponding path program 125 times [2021-07-09 17:56:33,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:33,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006379525] [2021-07-09 17:56:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:56:33,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:33,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006379525] [2021-07-09 17:56:33,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006379525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:33,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217325662] [2021-07-09 17:56:33,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:33,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:56:33,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:33,516 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-09 17:56:33,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:33,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:33,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:33,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:33,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:33,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:33,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:33,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:33,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:33,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:33,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:33,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:33,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:33,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:33,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:33,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:33,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:33,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:33,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:33,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217325662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:33,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:33,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-07-09 17:56:33,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915378369] [2021-07-09 17:56:33,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:56:33,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:33,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:56:33,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:56:33,943 INFO L87 Difference]: Start difference. First operand 2606 states and 5164 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:34,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:34,465 INFO L93 Difference]: Finished difference Result 3655 states and 7282 transitions. [2021-07-09 17:56:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:56:34,465 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:34,469 INFO L225 Difference]: With dead ends: 3655 [2021-07-09 17:56:34,469 INFO L226 Difference]: Without dead ends: 3429 [2021-07-09 17:56:34,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 673.5ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:56:34,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2021-07-09 17:56:34,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 2750. [2021-07-09 17:56:34,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2750 states, 2749 states have (on average 1.9774463441251364) internal successors, (5436), 2749 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:34,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 5436 transitions. [2021-07-09 17:56:34,494 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 5436 transitions. Word has length 36 [2021-07-09 17:56:34,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:34,494 INFO L482 AbstractCegarLoop]: Abstraction has 2750 states and 5436 transitions. [2021-07-09 17:56:34,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:34,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 5436 transitions. [2021-07-09 17:56:34,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:34,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:34,496 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:34,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:34,697 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:34,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:34,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1945089073, now seen corresponding path program 126 times [2021-07-09 17:56:34,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:34,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274788799] [2021-07-09 17:56:34,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:34,943 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:56:34,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:34,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274788799] [2021-07-09 17:56:34,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274788799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:34,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043617495] [2021-07-09 17:56:34,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:34,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:56:34,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:34,976 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:34,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:35,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:35,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:35,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:35,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:35,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:35,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:35,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:35,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:35,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:35,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:35,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:35,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:35,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:35,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:35,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:35,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:35,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:35,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:35,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:35,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:35,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:35,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:35,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043617495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:35,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:35,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-07-09 17:56:35,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458575659] [2021-07-09 17:56:35,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:56:35,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:35,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:56:35,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:56:35,440 INFO L87 Difference]: Start difference. First operand 2750 states and 5436 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:35,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:35,929 INFO L93 Difference]: Finished difference Result 4517 states and 8999 transitions. [2021-07-09 17:56:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:56:35,929 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:35,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:35,934 INFO L225 Difference]: With dead ends: 4517 [2021-07-09 17:56:35,934 INFO L226 Difference]: Without dead ends: 4275 [2021-07-09 17:56:35,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 754.0ms TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:56:35,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2021-07-09 17:56:35,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3137. [2021-07-09 17:56:35,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3137 states, 3136 states have (on average 1.9716198979591837) internal successors, (6183), 3136 states have internal predecessors, (6183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:35,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 6183 transitions. [2021-07-09 17:56:35,966 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 6183 transitions. Word has length 36 [2021-07-09 17:56:35,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:35,967 INFO L482 AbstractCegarLoop]: Abstraction has 3137 states and 6183 transitions. [2021-07-09 17:56:35,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:35,967 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 6183 transitions. [2021-07-09 17:56:35,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:35,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:35,969 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:36,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:36,170 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:36,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:36,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1047697171, now seen corresponding path program 127 times [2021-07-09 17:56:36,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:36,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663259254] [2021-07-09 17:56:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:36,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:36,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663259254] [2021-07-09 17:56:36,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663259254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:36,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158177860] [2021-07-09 17:56:36,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:36,467 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:36,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:36,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:36,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:36,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:36,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:36,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:36,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:36,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:36,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:36,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:36,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:36,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:36,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:36,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:36,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:36,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:36,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:36,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:36,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:36,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:36,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:36,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158177860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:36,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:36,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-07-09 17:56:36,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099074093] [2021-07-09 17:56:36,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:56:36,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:36,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:56:36,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:56:36,923 INFO L87 Difference]: Start difference. First operand 3137 states and 6183 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-07-09 17:56:37,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:37,233 INFO L93 Difference]: Finished difference Result 4057 states and 8128 transitions. [2021-07-09 17:56:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:56:37,233 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:37,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:37,237 INFO L225 Difference]: With dead ends: 4057 [2021-07-09 17:56:37,238 INFO L226 Difference]: Without dead ends: 3966 [2021-07-09 17:56:37,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 614.7ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:56:37,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3966 states. [2021-07-09 17:56:37,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3966 to 3158. [2021-07-09 17:56:37,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3158 states, 3157 states have (on average 1.9718086791257523) internal successors, (6225), 3157 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:37,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3158 states to 3158 states and 6225 transitions. [2021-07-09 17:56:37,280 INFO L78 Accepts]: Start accepts. Automaton has 3158 states and 6225 transitions. Word has length 36 [2021-07-09 17:56:37,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:37,280 INFO L482 AbstractCegarLoop]: Abstraction has 3158 states and 6225 transitions. [2021-07-09 17:56:37,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-07-09 17:56:37,280 INFO L276 IsEmpty]: Start isEmpty. Operand 3158 states and 6225 transitions. [2021-07-09 17:56:37,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:37,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:37,283 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:37,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:37,483 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:37,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:37,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1035510087, now seen corresponding path program 128 times [2021-07-09 17:56:37,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:37,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367442951] [2021-07-09 17:56:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:56:37,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:37,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367442951] [2021-07-09 17:56:37,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367442951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:37,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262322929] [2021-07-09 17:56:37,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:37,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:56:37,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:37,757 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:37,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:38,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:38,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:38,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:38,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:38,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:38,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:38,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:38,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:38,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:38,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:38,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:38,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:38,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:38,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:38,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:38,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:38,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:38,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:38,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262322929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:38,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:38,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-07-09 17:56:38,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102998738] [2021-07-09 17:56:38,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:56:38,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:38,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:56:38,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:56:38,176 INFO L87 Difference]: Start difference. First operand 3158 states and 6225 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:38,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:38,677 INFO L93 Difference]: Finished difference Result 4075 states and 8096 transitions. [2021-07-09 17:56:38,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:56:38,677 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:38,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:38,681 INFO L225 Difference]: With dead ends: 4075 [2021-07-09 17:56:38,681 INFO L226 Difference]: Without dead ends: 3853 [2021-07-09 17:56:38,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 701.9ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:56:38,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3853 states. [2021-07-09 17:56:38,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3853 to 3251. [2021-07-09 17:56:38,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 3250 states have (on average 1.9726153846153847) internal successors, (6411), 3250 states have internal predecessors, (6411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:38,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 6411 transitions. [2021-07-09 17:56:38,710 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 6411 transitions. Word has length 36 [2021-07-09 17:56:38,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:38,710 INFO L482 AbstractCegarLoop]: Abstraction has 3251 states and 6411 transitions. [2021-07-09 17:56:38,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:38,710 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 6411 transitions. [2021-07-09 17:56:38,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:38,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:38,712 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:38,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:38,913 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:38,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:38,913 INFO L82 PathProgramCache]: Analyzing trace with hash -438462017, now seen corresponding path program 129 times [2021-07-09 17:56:38,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:38,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462440875] [2021-07-09 17:56:38,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:39,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:39,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462440875] [2021-07-09 17:56:39,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462440875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:39,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980570945] [2021-07-09 17:56:39,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:39,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:56:39,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:39,190 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:39,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:39,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:39,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:39,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:39,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:39,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:39,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:39,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:39,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:39,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:39,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:39,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:39,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:39,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:39,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:39,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:39,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:39,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:39,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:39,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:39,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:39,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:39,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980570945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:39,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:39,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-07-09 17:56:39,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086789652] [2021-07-09 17:56:39,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:56:39,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:39,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:56:39,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:56:39,639 INFO L87 Difference]: Start difference. First operand 3251 states and 6411 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) 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) [2021-07-09 17:56:40,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:40,144 INFO L93 Difference]: Finished difference Result 5265 states and 10504 transitions. [2021-07-09 17:56:40,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:56:40,144 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) 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) Word has length 36 [2021-07-09 17:56:40,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:40,150 INFO L225 Difference]: With dead ends: 5265 [2021-07-09 17:56:40,150 INFO L226 Difference]: Without dead ends: 5202 [2021-07-09 17:56:40,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 602.8ms TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:56:40,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5202 states. [2021-07-09 17:56:40,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5202 to 3164. [2021-07-09 17:56:40,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3164 states, 3163 states have (on average 1.971862156180841) internal successors, (6237), 3163 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:40,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 6237 transitions. [2021-07-09 17:56:40,185 INFO L78 Accepts]: Start accepts. Automaton has 3164 states and 6237 transitions. Word has length 36 [2021-07-09 17:56:40,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:40,185 INFO L482 AbstractCegarLoop]: Abstraction has 3164 states and 6237 transitions. [2021-07-09 17:56:40,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) 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) [2021-07-09 17:56:40,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3164 states and 6237 transitions. [2021-07-09 17:56:40,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:40,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:40,187 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:40,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-09 17:56:40,388 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:40,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:40,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1957276157, now seen corresponding path program 130 times [2021-07-09 17:56:40,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:40,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006441122] [2021-07-09 17:56:40,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:40,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:40,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006441122] [2021-07-09 17:56:40,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006441122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:40,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824496786] [2021-07-09 17:56:40,660 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 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 [2021-07-09 17:56:40,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:56:40,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:40,685 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:40,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:41,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:41,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:41,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:41,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:41,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:41,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:41,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:41,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:41,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:41,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:41,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:41,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:41,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:41,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:41,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:41,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:41,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:41,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:41,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:41,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824496786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:41,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:41,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-07-09 17:56:41,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602480281] [2021-07-09 17:56:41,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:56:41,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:41,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:56:41,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:56:41,152 INFO L87 Difference]: Start difference. First operand 3164 states and 6237 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-07-09 17:56:41,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:41,533 INFO L93 Difference]: Finished difference Result 4252 states and 8498 transitions. [2021-07-09 17:56:41,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:56:41,534 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:41,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:41,538 INFO L225 Difference]: With dead ends: 4252 [2021-07-09 17:56:41,538 INFO L226 Difference]: Without dead ends: 4193 [2021-07-09 17:56:41,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 608.1ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:56:41,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2021-07-09 17:56:41,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 3191. [2021-07-09 17:56:41,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3190 states have (on average 1.9721003134796238) internal successors, (6291), 3190 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:41,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 6291 transitions. [2021-07-09 17:56:41,569 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 6291 transitions. Word has length 36 [2021-07-09 17:56:41,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:41,569 INFO L482 AbstractCegarLoop]: Abstraction has 3191 states and 6291 transitions. [2021-07-09 17:56:41,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-07-09 17:56:41,569 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 6291 transitions. [2021-07-09 17:56:41,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:41,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:41,585 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:41,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-09 17:56:41,786 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:41,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:41,786 INFO L82 PathProgramCache]: Analyzing trace with hash -954336019, now seen corresponding path program 131 times [2021-07-09 17:56:41,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:41,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917617433] [2021-07-09 17:56:41,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:42,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:42,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917617433] [2021-07-09 17:56:42,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917617433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:42,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825458280] [2021-07-09 17:56:42,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:42,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:56:42,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:42,090 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:42,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:42,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:42,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:42,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:42,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:42,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:42,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:42,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:42,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:42,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:42,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:42,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:42,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:42,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:42,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:42,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:42,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:42,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:42,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:42,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:42,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:42,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825458280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:42,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:42,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-07-09 17:56:42,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632871270] [2021-07-09 17:56:42,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:56:42,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:42,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:56:42,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:56:42,613 INFO L87 Difference]: Start difference. First operand 3191 states and 6291 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-07-09 17:56:43,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:43,043 INFO L93 Difference]: Finished difference Result 3853 states and 7654 transitions. [2021-07-09 17:56:43,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:56:43,043 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:43,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:43,047 INFO L225 Difference]: With dead ends: 3853 [2021-07-09 17:56:43,047 INFO L226 Difference]: Without dead ends: 3829 [2021-07-09 17:56:43,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 660.0ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:56:43,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3829 states. [2021-07-09 17:56:43,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3829 to 3191. [2021-07-09 17:56:43,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3190 states have (on average 1.9721003134796238) internal successors, (6291), 3190 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:43,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 6291 transitions. [2021-07-09 17:56:43,086 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 6291 transitions. Word has length 36 [2021-07-09 17:56:43,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:43,086 INFO L482 AbstractCegarLoop]: Abstraction has 3191 states and 6291 transitions. [2021-07-09 17:56:43,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-07-09 17:56:43,087 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 6291 transitions. [2021-07-09 17:56:43,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:43,089 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:43,089 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:43,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-09 17:56:43,289 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:43,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:43,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1694909327, now seen corresponding path program 132 times [2021-07-09 17:56:43,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:43,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724435341] [2021-07-09 17:56:43,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:56:43,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:43,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724435341] [2021-07-09 17:56:43,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724435341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:43,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35950653] [2021-07-09 17:56:43,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:43,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:56:43,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:43,604 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:43,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:44,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:44,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:44,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:44,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:44,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:44,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:44,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:44,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:44,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:44,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:44,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:44,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:44,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:44,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:44,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:44,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:44,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:44,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:44,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:44,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:44,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:44,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:44,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35950653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:44,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:44,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-07-09 17:56:44,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654004828] [2021-07-09 17:56:44,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:56:44,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:44,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:56:44,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:56:44,033 INFO L87 Difference]: Start difference. First operand 3191 states and 6291 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:44,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:44,576 INFO L93 Difference]: Finished difference Result 4117 states and 8186 transitions. [2021-07-09 17:56:44,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:56:44,577 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:44,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:44,581 INFO L225 Difference]: With dead ends: 4117 [2021-07-09 17:56:44,581 INFO L226 Difference]: Without dead ends: 3907 [2021-07-09 17:56:44,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 763.5ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:56:44,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-07-09 17:56:44,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 3290. [2021-07-09 17:56:44,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 3289 states have (on average 1.9723320158102766) internal successors, (6487), 3289 states have internal predecessors, (6487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:44,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 6487 transitions. [2021-07-09 17:56:44,617 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 6487 transitions. Word has length 36 [2021-07-09 17:56:44,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:44,617 INFO L482 AbstractCegarLoop]: Abstraction has 3290 states and 6487 transitions. [2021-07-09 17:56:44,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:44,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 6487 transitions. [2021-07-09 17:56:44,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:44,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:44,620 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:44,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:44,821 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:44,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:44,821 INFO L82 PathProgramCache]: Analyzing trace with hash 220937223, now seen corresponding path program 133 times [2021-07-09 17:56:44,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:44,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291004414] [2021-07-09 17:56:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:45,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:45,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291004414] [2021-07-09 17:56:45,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291004414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:45,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054560999] [2021-07-09 17:56:45,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:45,118 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:45,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:45,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:45,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:45,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:45,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:45,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:45,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:45,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:45,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:45,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:45,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:45,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:45,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:45,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:45,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:45,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:45,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:45,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:45,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:45,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054560999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:45,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:45,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-07-09 17:56:45,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063698161] [2021-07-09 17:56:45,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:56:45,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:45,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:56:45,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:56:45,558 INFO L87 Difference]: Start difference. First operand 3290 states and 6487 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) 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) [2021-07-09 17:56:45,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:45,944 INFO L93 Difference]: Finished difference Result 4583 states and 9168 transitions. [2021-07-09 17:56:45,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:56:45,944 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) 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) Word has length 36 [2021-07-09 17:56:45,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:45,949 INFO L225 Difference]: With dead ends: 4583 [2021-07-09 17:56:45,949 INFO L226 Difference]: Without dead ends: 4530 [2021-07-09 17:56:45,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 612.7ms TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:56:45,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4530 states. [2021-07-09 17:56:45,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4530 to 3230. [2021-07-09 17:56:45,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3230 states, 3229 states have (on average 1.9733663672963766) internal successors, (6372), 3229 states have internal predecessors, (6372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:45,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3230 states to 3230 states and 6372 transitions. [2021-07-09 17:56:45,982 INFO L78 Accepts]: Start accepts. Automaton has 3230 states and 6372 transitions. Word has length 36 [2021-07-09 17:56:45,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:45,982 INFO L482 AbstractCegarLoop]: Abstraction has 3230 states and 6372 transitions. [2021-07-09 17:56:45,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) 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) [2021-07-09 17:56:45,982 INFO L276 IsEmpty]: Start isEmpty. Operand 3230 states and 6372 transitions. [2021-07-09 17:56:45,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:45,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:45,985 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:46,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-09 17:56:46,185 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:46,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:46,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1675552753, now seen corresponding path program 134 times [2021-07-09 17:56:46,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:46,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831134317] [2021-07-09 17:56:46,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:46,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:46,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831134317] [2021-07-09 17:56:46,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831134317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:46,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852943652] [2021-07-09 17:56:46,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:46,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:56:46,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:46,540 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:46,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:46,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:46,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:46,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:46,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:46,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:46,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:46,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:46,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:46,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:46,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:46,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:46,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:46,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:46,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:46,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:46,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:46,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:46,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:46,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:46,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:46,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852943652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:46,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:46,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-07-09 17:56:46,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694489172] [2021-07-09 17:56:46,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:56:46,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:46,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:56:46,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:56:46,984 INFO L87 Difference]: Start difference. First operand 3230 states and 6372 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) 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) [2021-07-09 17:56:47,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:47,516 INFO L93 Difference]: Finished difference Result 4673 states and 9315 transitions. [2021-07-09 17:56:47,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:56:47,516 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) 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) Word has length 36 [2021-07-09 17:56:47,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:47,521 INFO L225 Difference]: With dead ends: 4673 [2021-07-09 17:56:47,521 INFO L226 Difference]: Without dead ends: 4610 [2021-07-09 17:56:47,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 656.5ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:56:47,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2021-07-09 17:56:47,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 3248. [2021-07-09 17:56:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 3247 states have (on average 1.9728980597474592) internal successors, (6406), 3247 states have internal predecessors, (6406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:47,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 6406 transitions. [2021-07-09 17:56:47,552 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 6406 transitions. Word has length 36 [2021-07-09 17:56:47,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:47,552 INFO L482 AbstractCegarLoop]: Abstraction has 3248 states and 6406 transitions. [2021-07-09 17:56:47,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) 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) [2021-07-09 17:56:47,553 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 6406 transitions. [2021-07-09 17:56:47,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:47,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:47,555 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:47,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:47,756 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:47,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:47,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1297876917, now seen corresponding path program 135 times [2021-07-09 17:56:47,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:47,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032159687] [2021-07-09 17:56:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:48,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:48,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032159687] [2021-07-09 17:56:48,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032159687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:48,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653284656] [2021-07-09 17:56:48,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:48,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:56:48,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:48,039 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:48,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:48,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:48,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:48,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:48,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:48,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:48,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:48,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:48,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:48,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:48,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:48,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:48,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:48,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:48,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:48,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:48,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:48,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:48,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:48,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:48,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:48,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653284656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:48,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:48,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-07-09 17:56:48,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486426410] [2021-07-09 17:56:48,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:56:48,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:48,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:56:48,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:56:48,490 INFO L87 Difference]: Start difference. First operand 3248 states and 6406 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-07-09 17:56:48,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:48,868 INFO L93 Difference]: Finished difference Result 4370 states and 8737 transitions. [2021-07-09 17:56:48,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:56:48,869 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:48,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:48,873 INFO L225 Difference]: With dead ends: 4370 [2021-07-09 17:56:48,873 INFO L226 Difference]: Without dead ends: 4311 [2021-07-09 17:56:48,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 600.1ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:56:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2021-07-09 17:56:48,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 3263. [2021-07-09 17:56:48,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 1.9730226854690374) internal successors, (6436), 3262 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:48,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 6436 transitions. [2021-07-09 17:56:48,904 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 6436 transitions. Word has length 36 [2021-07-09 17:56:48,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:48,904 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 6436 transitions. [2021-07-09 17:56:48,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-07-09 17:56:48,904 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 6436 transitions. [2021-07-09 17:56:48,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:48,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:48,906 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:49,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:49,107 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:49,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:49,107 INFO L82 PathProgramCache]: Analyzing trace with hash -294936779, now seen corresponding path program 136 times [2021-07-09 17:56:49,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:49,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938821122] [2021-07-09 17:56:49,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:49,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:49,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938821122] [2021-07-09 17:56:49,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938821122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:49,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47625991] [2021-07-09 17:56:49,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:49,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:56:49,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:49,400 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:49,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:49,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:49,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:49,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:49,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:49,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:49,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:49,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:49,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:49,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:49,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:49,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:49,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:49,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:49,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:49,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:49,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:49,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:49,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:49,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:49,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:49,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47625991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:49,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:49,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-07-09 17:56:49,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395364672] [2021-07-09 17:56:49,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:56:49,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:49,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:56:49,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:56:49,852 INFO L87 Difference]: Start difference. First operand 3263 states and 6436 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-07-09 17:56:50,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:50,230 INFO L93 Difference]: Finished difference Result 3962 states and 7874 transitions. [2021-07-09 17:56:50,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:56:50,230 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:50,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:50,234 INFO L225 Difference]: With dead ends: 3962 [2021-07-09 17:56:50,234 INFO L226 Difference]: Without dead ends: 3938 [2021-07-09 17:56:50,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 605.4ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:56:50,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2021-07-09 17:56:50,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3263. [2021-07-09 17:56:50,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 1.9730226854690374) internal successors, (6436), 3262 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 6436 transitions. [2021-07-09 17:56:50,264 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 6436 transitions. Word has length 36 [2021-07-09 17:56:50,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:50,264 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 6436 transitions. [2021-07-09 17:56:50,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-07-09 17:56:50,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 6436 transitions. [2021-07-09 17:56:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:50,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:50,267 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:50,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:50,468 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:50,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1058906707, now seen corresponding path program 137 times [2021-07-09 17:56:50,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:50,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205291915] [2021-07-09 17:56:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:50,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:50,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205291915] [2021-07-09 17:56:50,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205291915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:50,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006818354] [2021-07-09 17:56:50,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:50,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:56:50,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:50,768 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 17:56:50,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:51,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:51,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:51,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:51,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:51,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:51,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:51,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:51,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:51,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:51,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:51,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:51,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:51,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:51,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:51,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:51,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:51,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:51,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:51,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:51,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:51,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:51,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:51,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:51,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006818354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:51,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:51,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-07-09 17:56:51,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890526068] [2021-07-09 17:56:51,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:56:51,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:51,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:56:51,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:56:51,255 INFO L87 Difference]: Start difference. First operand 3263 states and 6436 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-07-09 17:56:51,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:51,746 INFO L93 Difference]: Finished difference Result 3982 states and 7910 transitions. [2021-07-09 17:56:51,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:56:51,746 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:51,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:51,751 INFO L225 Difference]: With dead ends: 3982 [2021-07-09 17:56:51,751 INFO L226 Difference]: Without dead ends: 3948 [2021-07-09 17:56:51,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 622.3ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:56:51,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-07-09 17:56:51,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 3263. [2021-07-09 17:56:51,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 1.9730226854690374) internal successors, (6436), 3262 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:51,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 6436 transitions. [2021-07-09 17:56:51,780 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 6436 transitions. Word has length 36 [2021-07-09 17:56:51,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:51,780 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 6436 transitions. [2021-07-09 17:56:51,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-07-09 17:56:51,780 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 6436 transitions. [2021-07-09 17:56:51,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:51,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:51,782 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:51,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:51,983 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:51,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:51,983 INFO L82 PathProgramCache]: Analyzing trace with hash -532135131, now seen corresponding path program 138 times [2021-07-09 17:56:51,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:51,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781365176] [2021-07-09 17:56:51,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:56:52,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:52,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781365176] [2021-07-09 17:56:52,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781365176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:52,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233128449] [2021-07-09 17:56:52,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:52,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:56:52,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:52,269 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:52,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:52,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:52,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:52,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:52,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:52,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:52,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:52,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:52,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:52,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:52,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:52,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:52,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:52,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:52,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:52,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:52,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:52,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:52,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:52,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:52,683 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:52,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233128449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:52,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:52,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 25 [2021-07-09 17:56:52,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439443596] [2021-07-09 17:56:52,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:56:52,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:52,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:56:52,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:56:52,684 INFO L87 Difference]: Start difference. First operand 3263 states and 6436 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:53,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:53,199 INFO L93 Difference]: Finished difference Result 4128 states and 8203 transitions. [2021-07-09 17:56:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:56:53,199 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:53,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:53,204 INFO L225 Difference]: With dead ends: 4128 [2021-07-09 17:56:53,204 INFO L226 Difference]: Without dead ends: 3903 [2021-07-09 17:56:53,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 759.5ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:56:53,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3903 states. [2021-07-09 17:56:53,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3903 to 3338. [2021-07-09 17:56:53,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 3337 states have (on average 1.9733293377284986) internal successors, (6585), 3337 states have internal predecessors, (6585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:53,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 6585 transitions. [2021-07-09 17:56:53,234 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 6585 transitions. Word has length 36 [2021-07-09 17:56:53,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:53,234 INFO L482 AbstractCegarLoop]: Abstraction has 3338 states and 6585 transitions. [2021-07-09 17:56:53,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:53,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 6585 transitions. [2021-07-09 17:56:53,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:53,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:53,237 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:53,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:53,437 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:53,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:53,438 INFO L82 PathProgramCache]: Analyzing trace with hash -2006107235, now seen corresponding path program 139 times [2021-07-09 17:56:53,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:53,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964037962] [2021-07-09 17:56:53,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:53,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:53,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964037962] [2021-07-09 17:56:53,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964037962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:53,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749303591] [2021-07-09 17:56:53,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:53,799 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:53,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:54,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:54,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:54,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:54,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:54,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:54,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:54,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:54,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:54,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:54,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:54,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:54,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:54,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:54,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:54,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:54,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:54,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:54,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:54,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749303591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:54,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:54,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 26 [2021-07-09 17:56:54,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716120612] [2021-07-09 17:56:54,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:56:54,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:54,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:56:54,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:56:54,355 INFO L87 Difference]: Start difference. First operand 3338 states and 6585 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:54,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:54,696 INFO L93 Difference]: Finished difference Result 4598 states and 9201 transitions. [2021-07-09 17:56:54,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:56:54,696 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:54,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:54,702 INFO L225 Difference]: With dead ends: 4598 [2021-07-09 17:56:54,702 INFO L226 Difference]: Without dead ends: 4545 [2021-07-09 17:56:54,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 771.6ms TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:56:54,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4545 states. [2021-07-09 17:56:54,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4545 to 3326. [2021-07-09 17:56:54,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 3325 states have (on average 1.973233082706767) internal successors, (6561), 3325 states have internal predecessors, (6561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:54,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 6561 transitions. [2021-07-09 17:56:54,739 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 6561 transitions. Word has length 36 [2021-07-09 17:56:54,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:54,739 INFO L482 AbstractCegarLoop]: Abstraction has 3326 states and 6561 transitions. [2021-07-09 17:56:54,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:54,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 6561 transitions. [2021-07-09 17:56:54,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:54,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:54,742 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:54,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-09 17:56:54,942 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:54,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:54,943 INFO L82 PathProgramCache]: Analyzing trace with hash -551491705, now seen corresponding path program 140 times [2021-07-09 17:56:54,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:54,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691371115] [2021-07-09 17:56:54,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:55,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:55,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691371115] [2021-07-09 17:56:55,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691371115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:55,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233625217] [2021-07-09 17:56:55,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:55,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:56:55,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:55,294 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:55,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:55,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:55,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:55,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:55,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:55,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:55,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:55,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:55,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:55,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:55,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:55,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:55,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:55,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:55,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:55,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:55,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:55,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:55,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:55,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233625217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:55,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:55,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 26 [2021-07-09 17:56:55,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067972899] [2021-07-09 17:56:55,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:56:55,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:55,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:56:55,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:56:55,745 INFO L87 Difference]: Start difference. First operand 3326 states and 6561 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:56,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:56,072 INFO L93 Difference]: Finished difference Result 4391 states and 8752 transitions. [2021-07-09 17:56:56,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:56:56,072 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:56,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:56,077 INFO L225 Difference]: With dead ends: 4391 [2021-07-09 17:56:56,077 INFO L226 Difference]: Without dead ends: 4338 [2021-07-09 17:56:56,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 655.8ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:56:56,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4338 states. [2021-07-09 17:56:56,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4338 to 3344. [2021-07-09 17:56:56,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3343 states have (on average 1.9736763386180078) internal successors, (6598), 3343 states have internal predecessors, (6598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:56,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 6598 transitions. [2021-07-09 17:56:56,108 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 6598 transitions. Word has length 36 [2021-07-09 17:56:56,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:56,108 INFO L482 AbstractCegarLoop]: Abstraction has 3344 states and 6598 transitions. [2021-07-09 17:56:56,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:56,109 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 6598 transitions. [2021-07-09 17:56:56,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:56,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:56,111 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:56,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-09 17:56:56,311 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:56,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:56,312 INFO L82 PathProgramCache]: Analyzing trace with hash 300524031, now seen corresponding path program 141 times [2021-07-09 17:56:56,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:56,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83584886] [2021-07-09 17:56:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:56,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:56,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83584886] [2021-07-09 17:56:56,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83584886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:56,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755052907] [2021-07-09 17:56:56,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:56,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:56:56,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:56,659 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-09 17:56:56,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:57,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:57,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:57,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:57,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:57,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:57,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:57,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:57,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:57,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:57,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:57,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:57,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:57,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:57,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:57,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:57,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:57,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:57,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 37 [2021-07-09 17:56:57,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:57,292 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.3 percent of original size [2021-07-09 17:56:57,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:57,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:107, output treesize:10 [2021-07-09 17:56:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:57,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755052907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:57,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:57,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-07-09 17:56:57,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034255341] [2021-07-09 17:56:57,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:56:57,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:57,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:56:57,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:56:57,303 INFO L87 Difference]: Start difference. First operand 3344 states and 6598 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:58,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:58,314 INFO L93 Difference]: Finished difference Result 4634 states and 9234 transitions. [2021-07-09 17:56:58,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:56:58,314 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:58,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:58,319 INFO L225 Difference]: With dead ends: 4634 [2021-07-09 17:56:58,319 INFO L226 Difference]: Without dead ends: 4520 [2021-07-09 17:56:58,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1199.7ms TimeCoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:56:58,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4520 states. [2021-07-09 17:56:58,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4520 to 3368. [2021-07-09 17:56:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3368 states, 3367 states have (on average 1.9747549747549749) internal successors, (6649), 3367 states have internal predecessors, (6649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 6649 transitions. [2021-07-09 17:56:58,351 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 6649 transitions. Word has length 36 [2021-07-09 17:56:58,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:58,351 INFO L482 AbstractCegarLoop]: Abstraction has 3368 states and 6649 transitions. [2021-07-09 17:56:58,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:58,351 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 6649 transitions. [2021-07-09 17:56:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:58,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:58,354 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:58,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-09 17:56:58,556 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:58,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:58,556 INFO L82 PathProgramCache]: Analyzing trace with hash 770045921, now seen corresponding path program 142 times [2021-07-09 17:56:58,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:58,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297024694] [2021-07-09 17:56:58,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:58,855 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:58,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:58,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297024694] [2021-07-09 17:56:58,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297024694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:58,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023791738] [2021-07-09 17:56:58,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:58,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:56:58,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:58,881 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:56:58,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:59,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:59,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:59,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:59,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:59,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:59,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:59,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:59,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:59,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:59,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:56:59,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:59,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:59,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:59,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:56:59,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:59,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:59,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:59,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:56:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:59,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023791738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:59,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:59,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-07-09 17:56:59,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897942420] [2021-07-09 17:56:59,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:56:59,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:59,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:56:59,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:56:59,313 INFO L87 Difference]: Start difference. First operand 3368 states and 6649 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:59,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:59,634 INFO L93 Difference]: Finished difference Result 4433 states and 8859 transitions. [2021-07-09 17:56:59,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:56:59,634 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:59,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:59,639 INFO L225 Difference]: With dead ends: 4433 [2021-07-09 17:56:59,639 INFO L226 Difference]: Without dead ends: 4374 [2021-07-09 17:56:59,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 616.2ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:56:59,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4374 states. [2021-07-09 17:56:59,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4374 to 3356. [2021-07-09 17:56:59,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 1.9746646795827123) internal successors, (6625), 3355 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:59,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 6625 transitions. [2021-07-09 17:56:59,671 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 6625 transitions. Word has length 36 [2021-07-09 17:56:59,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:59,671 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 6625 transitions. [2021-07-09 17:56:59,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:59,671 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 6625 transitions. [2021-07-09 17:56:59,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:59,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:59,673 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:59,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-09 17:56:59,874 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:59,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:59,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1772986059, now seen corresponding path program 143 times [2021-07-09 17:56:59,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:59,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572381655] [2021-07-09 17:56:59,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:00,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:00,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572381655] [2021-07-09 17:57:00,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572381655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:00,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791925419] [2021-07-09 17:57:00,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:00,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:57:00,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:00,177 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:57:00,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:00,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:00,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:00,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:00,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:00,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:00,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:00,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:00,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:00,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:00,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:00,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:00,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:00,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:00,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:00,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:57:00,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:00,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:00,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:00,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:57:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:00,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791925419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:00,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:00,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-07-09 17:57:00,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711059859] [2021-07-09 17:57:00,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:57:00,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:00,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:57:00,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:57:00,620 INFO L87 Difference]: Start difference. First operand 3356 states and 6625 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:01,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:01,100 INFO L93 Difference]: Finished difference Result 4113 states and 8183 transitions. [2021-07-09 17:57:01,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:57:01,101 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:57:01,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:01,105 INFO L225 Difference]: With dead ends: 4113 [2021-07-09 17:57:01,106 INFO L226 Difference]: Without dead ends: 4089 [2021-07-09 17:57:01,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 593.6ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:57:01,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-07-09 17:57:01,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 3356. [2021-07-09 17:57:01,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 1.9746646795827123) internal successors, (6625), 3355 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 6625 transitions. [2021-07-09 17:57:01,141 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 6625 transitions. Word has length 36 [2021-07-09 17:57:01,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:01,141 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 6625 transitions. [2021-07-09 17:57:01,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:01,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 6625 transitions. [2021-07-09 17:57:01,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:57:01,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:01,144 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:01,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:01,344 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:01,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:01,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1009016131, now seen corresponding path program 144 times [2021-07-09 17:57:01,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:01,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163901191] [2021-07-09 17:57:01,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:01,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:01,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163901191] [2021-07-09 17:57:01,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163901191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:01,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063086693] [2021-07-09 17:57:01,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:01,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:57:01,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:01,634 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:57:01,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:02,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:02,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:02,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:02,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:02,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:02,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:02,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:02,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:02,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:02,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:02,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:02,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:02,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:02,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 37 [2021-07-09 17:57:02,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:02,936 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.3 percent of original size [2021-07-09 17:57:02,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:02,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:104, output treesize:10 [2021-07-09 17:57:02,946 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:02,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063086693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:02,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:02,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-07-09 17:57:02,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218059336] [2021-07-09 17:57:02,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:57:02,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:02,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:57:02,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:57:02,947 INFO L87 Difference]: Start difference. First operand 3356 states and 6625 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:07,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:07,700 INFO L93 Difference]: Finished difference Result 4097 states and 8147 transitions. [2021-07-09 17:57:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:57:07,701 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:57:07,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:07,705 INFO L225 Difference]: With dead ends: 4097 [2021-07-09 17:57:07,705 INFO L226 Difference]: Without dead ends: 4063 [2021-07-09 17:57:07,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 2864.5ms TimeCoverageRelationStatistics Valid=153, Invalid=1487, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:57:07,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4063 states. [2021-07-09 17:57:07,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4063 to 3353. [2021-07-09 17:57:07,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 1.974343675417661) internal successors, (6618), 3352 states have internal predecessors, (6618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 6618 transitions. [2021-07-09 17:57:07,735 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 6618 transitions. Word has length 36 [2021-07-09 17:57:07,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:07,735 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 6618 transitions. [2021-07-09 17:57:07,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:07,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 6618 transitions. [2021-07-09 17:57:07,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:57:07,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:07,737 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:07,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-07-09 17:57:07,938 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:07,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:07,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1533152851, now seen corresponding path program 145 times [2021-07-09 17:57:07,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:07,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512656449] [2021-07-09 17:57:07,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:08,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:08,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512656449] [2021-07-09 17:57:08,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512656449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:08,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185908911] [2021-07-09 17:57:08,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:08,351 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:57:08,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:08,718 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-07-09 17:57:08,718 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:57:08,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:08,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:08,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:08,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:89, output treesize:10 [2021-07-09 17:57:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:08,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185908911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:08,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:08,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2021-07-09 17:57:08,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915934186] [2021-07-09 17:57:08,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:57:08,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:08,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:57:08,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:57:08,735 INFO L87 Difference]: Start difference. First operand 3353 states and 6618 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:08,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:08,991 INFO L93 Difference]: Finished difference Result 3920 states and 7778 transitions. [2021-07-09 17:57:08,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:57:08,991 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:57:08,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:08,995 INFO L225 Difference]: With dead ends: 3920 [2021-07-09 17:57:08,995 INFO L226 Difference]: Without dead ends: 3905 [2021-07-09 17:57:08,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 652.1ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:57:08,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3905 states. [2021-07-09 17:57:09,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3905 to 3360. [2021-07-09 17:57:09,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 1.9746948496576362) internal successors, (6633), 3359 states have internal predecessors, (6633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:09,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 6633 transitions. [2021-07-09 17:57:09,023 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 6633 transitions. Word has length 36 [2021-07-09 17:57:09,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:09,023 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 6633 transitions. [2021-07-09 17:57:09,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:09,023 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 6633 transitions. [2021-07-09 17:57:09,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:57:09,026 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:09,026 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:09,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:09,226 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:09,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:09,227 INFO L82 PathProgramCache]: Analyzing trace with hash 297908302, now seen corresponding path program 146 times [2021-07-09 17:57:09,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:09,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840432231] [2021-07-09 17:57:09,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 41 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:09,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:09,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840432231] [2021-07-09 17:57:09,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840432231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:09,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508051700] [2021-07-09 17:57:09,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:09,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:09,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:09,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:57:09,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 41 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:09,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508051700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:09,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:09,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:57:09,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021063561] [2021-07-09 17:57:09,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:57:09,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:09,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:57:09,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:57:09,348 INFO L87 Difference]: Start difference. First operand 3360 states and 6633 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:09,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:09,381 INFO L93 Difference]: Finished difference Result 3841 states and 7613 transitions. [2021-07-09 17:57:09,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:57:09,381 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:57:09,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:09,385 INFO L225 Difference]: With dead ends: 3841 [2021-07-09 17:57:09,385 INFO L226 Difference]: Without dead ends: 3830 [2021-07-09 17:57:09,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:57:09,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3830 states. [2021-07-09 17:57:09,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3830 to 3470. [2021-07-09 17:57:09,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3470 states, 3469 states have (on average 1.9824156817526666) internal successors, (6877), 3469 states have internal predecessors, (6877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:09,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 6877 transitions. [2021-07-09 17:57:09,420 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 6877 transitions. Word has length 38 [2021-07-09 17:57:09,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:09,420 INFO L482 AbstractCegarLoop]: Abstraction has 3470 states and 6877 transitions. [2021-07-09 17:57:09,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:09,420 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 6877 transitions. [2021-07-09 17:57:09,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 17:57:09,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:09,423 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:09,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:09,624 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:09,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:09,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1224230535, now seen corresponding path program 147 times [2021-07-09 17:57:09,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:09,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16591480] [2021-07-09 17:57:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:09,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:09,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16591480] [2021-07-09 17:57:09,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16591480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:09,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092384044] [2021-07-09 17:57:09,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:09,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:57:09,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:09,904 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:57:09,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:10,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:10,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:10,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:10,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:10,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:10,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:10,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:10,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:10,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:10,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:10,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:10,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:10,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:10,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:10,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:10,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:10,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:10,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:10,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:57:10,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:10,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:10,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:10,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:57:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:10,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092384044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:10,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:10,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-07-09 17:57:10,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011972642] [2021-07-09 17:57:10,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:57:10,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:10,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:57:10,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:57:10,352 INFO L87 Difference]: Start difference. First operand 3470 states and 6877 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:11,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:11,074 INFO L93 Difference]: Finished difference Result 4514 states and 9036 transitions. [2021-07-09 17:57:11,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:57:11,074 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 17:57:11,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:11,079 INFO L225 Difference]: With dead ends: 4514 [2021-07-09 17:57:11,079 INFO L226 Difference]: Without dead ends: 4469 [2021-07-09 17:57:11,080 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 787.3ms TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:57:11,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2021-07-09 17:57:11,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 3509. [2021-07-09 17:57:11,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3509 states, 3508 states have (on average 1.9817559863169898) internal successors, (6952), 3508 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:11,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3509 states to 3509 states and 6952 transitions. [2021-07-09 17:57:11,113 INFO L78 Accepts]: Start accepts. Automaton has 3509 states and 6952 transitions. Word has length 39 [2021-07-09 17:57:11,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:11,113 INFO L482 AbstractCegarLoop]: Abstraction has 3509 states and 6952 transitions. [2021-07-09 17:57:11,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:11,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3509 states and 6952 transitions. [2021-07-09 17:57:11,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 17:57:11,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:11,116 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:11,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:11,317 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:11,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:11,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2076785471, now seen corresponding path program 148 times [2021-07-09 17:57:11,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:11,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265284841] [2021-07-09 17:57:11,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:11,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:11,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265284841] [2021-07-09 17:57:11,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265284841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:11,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144918163] [2021-07-09 17:57:11,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:11,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:57:11,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:11,620 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:57:11,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:12,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:12,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:12,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:12,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:12,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:12,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:12,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:12,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:12,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:12,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:12,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:12,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:12,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:12,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:12,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:12,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:57:12,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:12,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:12,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:12,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:57:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:12,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144918163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:12,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:12,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-07-09 17:57:12,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437969648] [2021-07-09 17:57:12,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:57:12,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:12,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:57:12,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:57:12,063 INFO L87 Difference]: Start difference. First operand 3509 states and 6952 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:12,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:12,746 INFO L93 Difference]: Finished difference Result 4780 states and 9544 transitions. [2021-07-09 17:57:12,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:57:12,747 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 17:57:12,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:12,752 INFO L225 Difference]: With dead ends: 4780 [2021-07-09 17:57:12,753 INFO L226 Difference]: Without dead ends: 4735 [2021-07-09 17:57:12,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 817.8ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:57:12,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4735 states. [2021-07-09 17:57:12,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4735 to 3509. [2021-07-09 17:57:12,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3509 states, 3508 states have (on average 1.9817559863169898) internal successors, (6952), 3508 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:12,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3509 states to 3509 states and 6952 transitions. [2021-07-09 17:57:12,793 INFO L78 Accepts]: Start accepts. Automaton has 3509 states and 6952 transitions. Word has length 39 [2021-07-09 17:57:12,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:12,794 INFO L482 AbstractCegarLoop]: Abstraction has 3509 states and 6952 transitions. [2021-07-09 17:57:12,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:12,794 INFO L276 IsEmpty]: Start isEmpty. Operand 3509 states and 6952 transitions. [2021-07-09 17:57:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 17:57:12,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:12,797 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:12,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:12,997 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:12,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:12,998 INFO L82 PathProgramCache]: Analyzing trace with hash 101428265, now seen corresponding path program 149 times [2021-07-09 17:57:12,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:12,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238907010] [2021-07-09 17:57:12,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:57:13,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:13,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238907010] [2021-07-09 17:57:13,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238907010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:13,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514257359] [2021-07-09 17:57:13,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:13,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:57:13,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:13,305 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:57:13,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:13,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:13,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:13,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:13,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:13,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:13,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:13,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:13,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:13,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:13,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:13,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:13,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:13,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:13,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:13,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:13,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:13,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:13,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:13,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:13,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:13,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:13,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:13,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:13,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:13,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:13,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-07-09 17:57:13,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:13,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:13,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:13,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-07-09 17:57:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:57:13,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514257359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:13,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:13,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-07-09 17:57:13,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950914757] [2021-07-09 17:57:13,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 17:57:13,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:13,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 17:57:13,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:57:13,873 INFO L87 Difference]: Start difference. First operand 3509 states and 6952 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:14,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:14,929 INFO L93 Difference]: Finished difference Result 4916 states and 9863 transitions. [2021-07-09 17:57:14,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:57:14,929 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 17:57:14,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:14,934 INFO L225 Difference]: With dead ends: 4916 [2021-07-09 17:57:14,935 INFO L226 Difference]: Without dead ends: 4871 [2021-07-09 17:57:14,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1206.8ms TimeCoverageRelationStatistics Valid=212, Invalid=1950, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:57:14,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2021-07-09 17:57:14,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 3533. [2021-07-09 17:57:14,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3533 states, 3532 states have (on average 1.9818799546998866) internal successors, (7000), 3532 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:14,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3533 states to 3533 states and 7000 transitions. [2021-07-09 17:57:14,969 INFO L78 Accepts]: Start accepts. Automaton has 3533 states and 7000 transitions. Word has length 39 [2021-07-09 17:57:14,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:14,970 INFO L482 AbstractCegarLoop]: Abstraction has 3533 states and 7000 transitions. [2021-07-09 17:57:14,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:14,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3533 states and 7000 transitions. [2021-07-09 17:57:14,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 17:57:14,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:14,973 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:15,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:15,173 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:15,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:15,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1574344523, now seen corresponding path program 150 times [2021-07-09 17:57:15,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:15,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798967657] [2021-07-09 17:57:15,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:57:15,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:15,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798967657] [2021-07-09 17:57:15,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798967657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:15,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44351188] [2021-07-09 17:57:15,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:15,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:57:15,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:15,431 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:57:15,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:15,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:15,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:15,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:15,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:15,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:15,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:15,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:15,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:15,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:15,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:15,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:15,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:15,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:15,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:15,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:15,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:57:15,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:15,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:15,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:15,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:57:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:57:15,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44351188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:15,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:15,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-07-09 17:57:15,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377512188] [2021-07-09 17:57:15,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:57:15,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:15,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:57:15,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:57:15,892 INFO L87 Difference]: Start difference. First operand 3533 states and 7000 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:16,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:16,514 INFO L93 Difference]: Finished difference Result 5103 states and 10179 transitions. [2021-07-09 17:57:16,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:57:16,514 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 17:57:16,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:16,520 INFO L225 Difference]: With dead ends: 5103 [2021-07-09 17:57:16,520 INFO L226 Difference]: Without dead ends: 4891 [2021-07-09 17:57:16,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 870.0ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:57:16,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2021-07-09 17:57:16,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 3611. [2021-07-09 17:57:16,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3611 states, 3610 states have (on average 1.9817174515235456) internal successors, (7154), 3610 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:16,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3611 states to 3611 states and 7154 transitions. [2021-07-09 17:57:16,561 INFO L78 Accepts]: Start accepts. Automaton has 3611 states and 7154 transitions. Word has length 39 [2021-07-09 17:57:16,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:16,561 INFO L482 AbstractCegarLoop]: Abstraction has 3611 states and 7154 transitions. [2021-07-09 17:57:16,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:16,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3611 states and 7154 transitions. [2021-07-09 17:57:16,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 17:57:16,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:16,565 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:16,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-07-09 17:57:16,765 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:16,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:16,765 INFO L82 PathProgramCache]: Analyzing trace with hash 935790731, now seen corresponding path program 151 times [2021-07-09 17:57:16,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:16,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91682760] [2021-07-09 17:57:16,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:16,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:57:16,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:16,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91682760] [2021-07-09 17:57:16,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91682760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:16,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149666341] [2021-07-09 17:57:16,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:17,024 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:57:17,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:17,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:17,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:17,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:17,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:17,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:17,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:17,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:17,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:17,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:17,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:17,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:17,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:17,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:17,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:57:17,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:17,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:17,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:17,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:57:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:57:17,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149666341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:17,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:17,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-07-09 17:57:17,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36981916] [2021-07-09 17:57:17,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:57:17,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:17,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:57:17,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:57:17,473 INFO L87 Difference]: Start difference. First operand 3611 states and 7154 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:18,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:18,264 INFO L93 Difference]: Finished difference Result 4917 states and 9849 transitions. [2021-07-09 17:57:18,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:57:18,264 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 17:57:18,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:18,270 INFO L225 Difference]: With dead ends: 4917 [2021-07-09 17:57:18,270 INFO L226 Difference]: Without dead ends: 4872 [2021-07-09 17:57:18,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 906.7ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:57:18,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2021-07-09 17:57:18,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 3671. [2021-07-09 17:57:18,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3670 states have (on average 1.98283378746594) internal successors, (7277), 3670 states have internal predecessors, (7277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:18,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 7277 transitions. [2021-07-09 17:57:18,308 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 7277 transitions. Word has length 39 [2021-07-09 17:57:18,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:18,308 INFO L482 AbstractCegarLoop]: Abstraction has 3671 states and 7277 transitions. [2021-07-09 17:57:18,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:18,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 7277 transitions. [2021-07-09 17:57:18,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 17:57:18,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:18,311 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:18,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:18,512 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:18,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:18,512 INFO L82 PathProgramCache]: Analyzing trace with hash 616889269, now seen corresponding path program 152 times [2021-07-09 17:57:18,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:18,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981058280] [2021-07-09 17:57:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:57:18,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:18,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981058280] [2021-07-09 17:57:18,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981058280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:18,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133508530] [2021-07-09 17:57:18,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:57:18,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:18,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:18,771 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:57:18,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:19,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:19,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:19,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:19,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:19,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:19,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:19,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:19,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:19,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:19,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:19,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:19,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:19,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:19,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-09 17:57:19,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:19,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:19,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:19,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-09 17:57:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:57:19,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133508530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:19,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:19,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-07-09 17:57:19,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684051945] [2021-07-09 17:57:19,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:57:19,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:19,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:57:19,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:57:19,221 INFO L87 Difference]: Start difference. First operand 3671 states and 7277 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:20,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:20,007 INFO L93 Difference]: Finished difference Result 5037 states and 10091 transitions. [2021-07-09 17:57:20,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:57:20,007 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 17:57:20,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:20,013 INFO L225 Difference]: With dead ends: 5037 [2021-07-09 17:57:20,013 INFO L226 Difference]: Without dead ends: 4992 [2021-07-09 17:57:20,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 856.1ms TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:57:20,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4992 states. [2021-07-09 17:57:20,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4992 to 3698. [2021-07-09 17:57:20,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3698 states, 3697 states have (on average 1.9829591560724913) internal successors, (7331), 3697 states have internal predecessors, (7331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3698 states to 3698 states and 7331 transitions. [2021-07-09 17:57:20,049 INFO L78 Accepts]: Start accepts. Automaton has 3698 states and 7331 transitions. Word has length 39 [2021-07-09 17:57:20,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:20,049 INFO L482 AbstractCegarLoop]: Abstraction has 3698 states and 7331 transitions. [2021-07-09 17:57:20,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:20,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3698 states and 7331 transitions. [2021-07-09 17:57:20,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:57:20,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:20,053 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:20,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-09 17:57:20,253 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:20,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:20,253 INFO L82 PathProgramCache]: Analyzing trace with hash 490317244, now seen corresponding path program 153 times [2021-07-09 17:57:20,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:20,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451264664] [2021-07-09 17:57:20,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:57:20,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:20,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451264664] [2021-07-09 17:57:20,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451264664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:20,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483677517] [2021-07-09 17:57:20,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:20,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:57:20,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:20,577 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 60 conjunts are in the unsatisfiable core [2021-07-09 17:57:20,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:21,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:21,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:21,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:21,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:21,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:21,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 44 [2021-07-09 17:57:21,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:21,743 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.9 percent of original size [2021-07-09 17:57:21,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:21,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:123, output treesize:12 [2021-07-09 17:57:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 4 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:21,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483677517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:21,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:21,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 34 [2021-07-09 17:57:21,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311557985] [2021-07-09 17:57:21,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 17:57:21,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:21,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 17:57:21,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:57:21,756 INFO L87 Difference]: Start difference. First operand 3698 states and 7331 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:23,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:23,296 INFO L93 Difference]: Finished difference Result 6069 states and 12152 transitions. [2021-07-09 17:57:23,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:57:23,296 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:57:23,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:23,303 INFO L225 Difference]: With dead ends: 6069 [2021-07-09 17:57:23,303 INFO L226 Difference]: Without dead ends: 6002 [2021-07-09 17:57:23,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1322.5ms TimeCoverageRelationStatistics Valid=170, Invalid=1810, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:57:23,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6002 states. [2021-07-09 17:57:23,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6002 to 3716. [2021-07-09 17:57:23,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 1.9822341857335128) internal successors, (7364), 3715 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:23,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 7364 transitions. [2021-07-09 17:57:23,360 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 7364 transitions. Word has length 41 [2021-07-09 17:57:23,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:23,360 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 7364 transitions. [2021-07-09 17:57:23,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:23,360 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 7364 transitions. [2021-07-09 17:57:23,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:57:23,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:23,363 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:23,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-09 17:57:23,564 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:23,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:23,564 INFO L82 PathProgramCache]: Analyzing trace with hash -543142796, now seen corresponding path program 154 times [2021-07-09 17:57:23,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:23,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987638245] [2021-07-09 17:57:23,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:23,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:23,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987638245] [2021-07-09 17:57:23,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987638245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:23,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581818227] [2021-07-09 17:57:23,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:23,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:57:23,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:23,897 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 17:57:23,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:24,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:24,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:24,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:24,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:24,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:24,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-09 17:57:24,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:24,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:24,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:24,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-09 17:57:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:24,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581818227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:24,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:24,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-07-09 17:57:24,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170063383] [2021-07-09 17:57:24,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 17:57:24,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:24,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 17:57:24,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:57:24,625 INFO L87 Difference]: Start difference. First operand 3716 states and 7364 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) 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) [2021-07-09 17:57:25,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:25,398 INFO L93 Difference]: Finished difference Result 6664 states and 13360 transitions. [2021-07-09 17:57:25,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:57:25,399 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) 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) Word has length 41 [2021-07-09 17:57:25,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:25,406 INFO L225 Difference]: With dead ends: 6664 [2021-07-09 17:57:25,406 INFO L226 Difference]: Without dead ends: 6597 [2021-07-09 17:57:25,406 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 986.9ms TimeCoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:57:25,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6597 states. [2021-07-09 17:57:25,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6597 to 3716. [2021-07-09 17:57:25,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 1.9822341857335128) internal successors, (7364), 3715 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:25,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 7364 transitions. [2021-07-09 17:57:25,450 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 7364 transitions. Word has length 41 [2021-07-09 17:57:25,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:25,450 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 7364 transitions. [2021-07-09 17:57:25,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) 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) [2021-07-09 17:57:25,450 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 7364 transitions. [2021-07-09 17:57:25,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:57:25,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:25,453 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:25,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-07-09 17:57:25,654 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:25,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:25,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1543593212, now seen corresponding path program 155 times [2021-07-09 17:57:25,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:25,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348916510] [2021-07-09 17:57:25,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:25,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:25,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348916510] [2021-07-09 17:57:25,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348916510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:25,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499390748] [2021-07-09 17:57:25,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:26,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:57:26,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:26,007 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 17:57:26,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:26,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:26,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:26,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:26,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:26,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:26,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:26,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-09 17:57:26,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:26,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:26,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:26,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-09 17:57:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:26,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499390748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:26,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:26,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-09 17:57:26,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550907798] [2021-07-09 17:57:26,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 17:57:26,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:26,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 17:57:26,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1205, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:57:26,739 INFO L87 Difference]: Start difference. First operand 3716 states and 7364 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:57:27,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:27,457 INFO L93 Difference]: Finished difference Result 7025 states and 14072 transitions. [2021-07-09 17:57:27,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:57:27,457 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:57:27,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:27,466 INFO L225 Difference]: With dead ends: 7025 [2021-07-09 17:57:27,467 INFO L226 Difference]: Without dead ends: 6922 [2021-07-09 17:57:27,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1029.7ms TimeCoverageRelationStatistics Valid=173, Invalid=1807, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:57:27,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6922 states. [2021-07-09 17:57:27,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6922 to 3857. [2021-07-09 17:57:27,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3856 states have (on average 1.97899377593361) internal successors, (7631), 3856 states have internal predecessors, (7631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:27,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 7631 transitions. [2021-07-09 17:57:27,522 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 7631 transitions. Word has length 41 [2021-07-09 17:57:27,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:27,522 INFO L482 AbstractCegarLoop]: Abstraction has 3857 states and 7631 transitions. [2021-07-09 17:57:27,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:57:27,522 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 7631 transitions. [2021-07-09 17:57:27,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:57:27,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:27,526 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:27,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:27,726 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:27,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:27,727 INFO L82 PathProgramCache]: Analyzing trace with hash -13013580, now seen corresponding path program 156 times [2021-07-09 17:57:27,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:27,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504674615] [2021-07-09 17:57:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:28,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:28,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504674615] [2021-07-09 17:57:28,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504674615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:28,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944012685] [2021-07-09 17:57:28,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:28,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:57:28,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:28,083 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 17:57:28,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:28,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:28,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:28,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:28,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:28,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:28,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:28,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-09 17:57:28,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:28,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:28,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:28,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-09 17:57:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:28,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944012685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:28,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:28,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-09 17:57:28,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662864616] [2021-07-09 17:57:28,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 17:57:28,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:28,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 17:57:28,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1204, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:57:28,965 INFO L87 Difference]: Start difference. First operand 3857 states and 7631 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:57:29,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:29,736 INFO L93 Difference]: Finished difference Result 5973 states and 11891 transitions. [2021-07-09 17:57:29,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:57:29,736 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:57:29,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:29,743 INFO L225 Difference]: With dead ends: 5973 [2021-07-09 17:57:29,743 INFO L226 Difference]: Without dead ends: 5944 [2021-07-09 17:57:29,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1164.8ms TimeCoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:57:29,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5944 states. [2021-07-09 17:57:29,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5944 to 3896. [2021-07-09 17:57:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3896 states, 3895 states have (on average 1.9802310654685493) internal successors, (7713), 3895 states have internal predecessors, (7713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:29,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3896 states to 3896 states and 7713 transitions. [2021-07-09 17:57:29,786 INFO L78 Accepts]: Start accepts. Automaton has 3896 states and 7713 transitions. Word has length 41 [2021-07-09 17:57:29,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:29,786 INFO L482 AbstractCegarLoop]: Abstraction has 3896 states and 7713 transitions. [2021-07-09 17:57:29,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:57:29,786 INFO L276 IsEmpty]: Start isEmpty. Operand 3896 states and 7713 transitions. [2021-07-09 17:57:29,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:57:29,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:29,789 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:29,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-07-09 17:57:29,990 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:29,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:29,990 INFO L82 PathProgramCache]: Analyzing trace with hash -862044258, now seen corresponding path program 157 times [2021-07-09 17:57:29,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:29,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891656916] [2021-07-09 17:57:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:30,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:30,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891656916] [2021-07-09 17:57:30,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891656916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:30,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516288387] [2021-07-09 17:57:30,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:30,349 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 17:57:30,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:31,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:31,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:31,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:31,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:31,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:31,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:31,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-09 17:57:31,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:31,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:31,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:31,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-09 17:57:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:31,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516288387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:31,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:31,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-07-09 17:57:31,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834174182] [2021-07-09 17:57:31,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 17:57:31,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:31,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 17:57:31,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:57:31,044 INFO L87 Difference]: Start difference. First operand 3896 states and 7713 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) 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) [2021-07-09 17:57:31,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:31,825 INFO L93 Difference]: Finished difference Result 6364 states and 12786 transitions. [2021-07-09 17:57:31,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:57:31,825 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) 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) Word has length 41 [2021-07-09 17:57:31,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:31,831 INFO L225 Difference]: With dead ends: 6364 [2021-07-09 17:57:31,831 INFO L226 Difference]: Without dead ends: 6297 [2021-07-09 17:57:31,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1014.3ms TimeCoverageRelationStatistics Valid=166, Invalid=1726, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:57:31,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6297 states. [2021-07-09 17:57:31,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6297 to 3182. [2021-07-09 17:57:31,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3182 states, 3181 states have (on average 1.994970135177617) internal successors, (6346), 3181 states have internal predecessors, (6346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:31,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 6346 transitions. [2021-07-09 17:57:31,867 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 6346 transitions. Word has length 41 [2021-07-09 17:57:31,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:31,867 INFO L482 AbstractCegarLoop]: Abstraction has 3182 states and 6346 transitions. [2021-07-09 17:57:31,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) 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) [2021-07-09 17:57:31,867 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 6346 transitions. [2021-07-09 17:57:31,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:57:31,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:31,870 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:32,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:32,070 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:32,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:32,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1224691750, now seen corresponding path program 158 times [2021-07-09 17:57:32,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:32,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892387677] [2021-07-09 17:57:32,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:32,499 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:32,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:32,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892387677] [2021-07-09 17:57:32,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892387677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:32,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431129066] [2021-07-09 17:57:32,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:32,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:32,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:32,533 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 17:57:32,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:33,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:33,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:33,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:33,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:33,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:33,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:33,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-09 17:57:33,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:33,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:33,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:33,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-09 17:57:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:33,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431129066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:33,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:33,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-09 17:57:33,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416333441] [2021-07-09 17:57:33,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 17:57:33,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:33,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 17:57:33,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:57:33,289 INFO L87 Difference]: Start difference. First operand 3182 states and 6346 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:57:34,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:34,180 INFO L93 Difference]: Finished difference Result 5735 states and 11591 transitions. [2021-07-09 17:57:34,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:57:34,180 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:57:34,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:34,189 INFO L225 Difference]: With dead ends: 5735 [2021-07-09 17:57:34,189 INFO L226 Difference]: Without dead ends: 5632 [2021-07-09 17:57:34,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1208.7ms TimeCoverageRelationStatistics Valid=176, Invalid=1894, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:57:34,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5632 states. [2021-07-09 17:57:34,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5632 to 2936. [2021-07-09 17:57:34,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2936 states, 2935 states have (on average 2.005792163543441) internal successors, (5887), 2935 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:34,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2936 states to 2936 states and 5887 transitions. [2021-07-09 17:57:34,234 INFO L78 Accepts]: Start accepts. Automaton has 2936 states and 5887 transitions. Word has length 41 [2021-07-09 17:57:34,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:34,234 INFO L482 AbstractCegarLoop]: Abstraction has 2936 states and 5887 transitions. [2021-07-09 17:57:34,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:57:34,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2936 states and 5887 transitions. [2021-07-09 17:57:34,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:57:34,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:34,237 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:34,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:34,437 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:34,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:34,437 INFO L82 PathProgramCache]: Analyzing trace with hash -331915042, now seen corresponding path program 159 times [2021-07-09 17:57:34,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:34,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532789381] [2021-07-09 17:57:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:34,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:34,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532789381] [2021-07-09 17:57:34,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532789381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:34,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781049968] [2021-07-09 17:57:34,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:34,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:57:34,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:34,818 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 62 conjunts are in the unsatisfiable core [2021-07-09 17:57:34,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:35,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:35,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:35,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:35,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:35,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:35,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 44 [2021-07-09 17:57:35,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:35,726 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-07-09 17:57:35,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:35,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:126, output treesize:12 [2021-07-09 17:57:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:35,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781049968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:35,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:35,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-09 17:57:35,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159997177] [2021-07-09 17:57:35,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 17:57:35,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:35,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 17:57:35,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1233, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:57:35,737 INFO L87 Difference]: Start difference. First operand 2936 states and 5887 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:57:38,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:38,150 INFO L93 Difference]: Finished difference Result 5251 states and 10563 transitions. [2021-07-09 17:57:38,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:57:38,150 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:57:38,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:38,156 INFO L225 Difference]: With dead ends: 5251 [2021-07-09 17:57:38,156 INFO L226 Difference]: Without dead ends: 5054 [2021-07-09 17:57:38,157 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 2264.1ms TimeCoverageRelationStatistics Valid=269, Invalid=3763, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 17:57:38,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5054 states. [2021-07-09 17:57:38,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5054 to 3113. [2021-07-09 17:57:38,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3113 states, 3112 states have (on average 1.9983933161953729) internal successors, (6219), 3112 states have internal predecessors, (6219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3113 states to 3113 states and 6219 transitions. [2021-07-09 17:57:38,188 INFO L78 Accepts]: Start accepts. Automaton has 3113 states and 6219 transitions. Word has length 41 [2021-07-09 17:57:38,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:38,188 INFO L482 AbstractCegarLoop]: Abstraction has 3113 states and 6219 transitions. [2021-07-09 17:57:38,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:57:38,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3113 states and 6219 transitions. [2021-07-09 17:57:38,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:57:38,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:38,191 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:38,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:38,391 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:38,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:38,392 INFO L82 PathProgramCache]: Analyzing trace with hash 199723986, now seen corresponding path program 160 times [2021-07-09 17:57:38,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:38,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019627705] [2021-07-09 17:57:38,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:38,715 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:38,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:38,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019627705] [2021-07-09 17:57:38,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019627705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:38,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002855457] [2021-07-09 17:57:38,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:38,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:57:38,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:38,742 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 17:57:38,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:39,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:39,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:39,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:39,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:39,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:39,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:39,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-09 17:57:39,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:39,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:39,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:39,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-09 17:57:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:39,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002855457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:39,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:39,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-07-09 17:57:39,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308489713] [2021-07-09 17:57:39,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 17:57:39,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:39,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 17:57:39,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:57:39,479 INFO L87 Difference]: Start difference. First operand 3113 states and 6219 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) 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) [2021-07-09 17:57:40,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:40,209 INFO L93 Difference]: Finished difference Result 5901 states and 11893 transitions. [2021-07-09 17:57:40,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:57:40,210 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) 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) Word has length 41 [2021-07-09 17:57:40,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:40,216 INFO L225 Difference]: With dead ends: 5901 [2021-07-09 17:57:40,217 INFO L226 Difference]: Without dead ends: 5804 [2021-07-09 17:57:40,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1055.9ms TimeCoverageRelationStatistics Valid=170, Invalid=1722, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:57:40,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5804 states. [2021-07-09 17:57:40,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5804 to 3365. [2021-07-09 17:57:40,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3365 states, 3364 states have (on average 1.9913793103448276) internal successors, (6699), 3364 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3365 states to 3365 states and 6699 transitions. [2021-07-09 17:57:40,258 INFO L78 Accepts]: Start accepts. Automaton has 3365 states and 6699 transitions. Word has length 41 [2021-07-09 17:57:40,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:40,258 INFO L482 AbstractCegarLoop]: Abstraction has 3365 states and 6699 transitions. [2021-07-09 17:57:40,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) 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) [2021-07-09 17:57:40,258 INFO L276 IsEmpty]: Start isEmpty. Operand 3365 states and 6699 transitions. [2021-07-09 17:57:40,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:57:40,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:40,261 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:40,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:40,461 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:40,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:40,462 INFO L82 PathProgramCache]: Analyzing trace with hash -273135364, now seen corresponding path program 161 times [2021-07-09 17:57:40,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:40,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288574279] [2021-07-09 17:57:40,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:40,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:40,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288574279] [2021-07-09 17:57:40,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288574279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:40,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199180388] [2021-07-09 17:57:40,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:40,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:57:40,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:40,845 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 17:57:40,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:42,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:42,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:42,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:42,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:42,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:42,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:42,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:42,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 36 [2021-07-09 17:57:42,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:42,523 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-07-09 17:57:42,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:42,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:99, output treesize:9 [2021-07-09 17:57:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:42,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199180388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:42,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:42,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-07-09 17:57:42,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29265140] [2021-07-09 17:57:42,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-09 17:57:42,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:42,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-09 17:57:42,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:57:42,549 INFO L87 Difference]: Start difference. First operand 3365 states and 6699 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:47,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:47,914 INFO L93 Difference]: Finished difference Result 6066 states and 12161 transitions. [2021-07-09 17:57:47,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:57:47,914 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:57:47,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:47,921 INFO L225 Difference]: With dead ends: 6066 [2021-07-09 17:57:47,921 INFO L226 Difference]: Without dead ends: 5834 [2021-07-09 17:57:47,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 3518.4ms TimeCoverageRelationStatistics Valid=242, Invalid=3064, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 17:57:47,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5834 states. [2021-07-09 17:57:47,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5834 to 3467. [2021-07-09 17:57:47,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3467 states, 3466 states have (on average 1.9899019042123485) internal successors, (6897), 3466 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:47,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3467 states to 3467 states and 6897 transitions. [2021-07-09 17:57:47,963 INFO L78 Accepts]: Start accepts. Automaton has 3467 states and 6897 transitions. Word has length 41 [2021-07-09 17:57:47,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:47,964 INFO L482 AbstractCegarLoop]: Abstraction has 3467 states and 6897 transitions. [2021-07-09 17:57:47,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:47,964 INFO L276 IsEmpty]: Start isEmpty. Operand 3467 states and 6897 transitions. [2021-07-09 17:57:47,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:57:47,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:47,967 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:48,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-07-09 17:57:48,167 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:48,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:48,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1829742156, now seen corresponding path program 162 times [2021-07-09 17:57:48,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:48,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108685906] [2021-07-09 17:57:48,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:48,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:48,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108685906] [2021-07-09 17:57:48,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108685906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:48,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947154716] [2021-07-09 17:57:48,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:48,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:57:48,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:48,542 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 17:57:48,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:49,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:49,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:49,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:49,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:49,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:49,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:49,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-09 17:57:49,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:49,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:49,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:49,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-09 17:57:49,334 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:49,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947154716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:49,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:49,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-09 17:57:49,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717776918] [2021-07-09 17:57:49,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 17:57:49,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:49,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 17:57:49,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:57:49,335 INFO L87 Difference]: Start difference. First operand 3467 states and 6897 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:57:50,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:50,141 INFO L93 Difference]: Finished difference Result 5352 states and 10712 transitions. [2021-07-09 17:57:50,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:57:50,141 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:57:50,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:50,147 INFO L225 Difference]: With dead ends: 5352 [2021-07-09 17:57:50,147 INFO L226 Difference]: Without dead ends: 5323 [2021-07-09 17:57:50,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1106.5ms TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:57:50,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5323 states. [2021-07-09 17:57:50,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5323 to 3467. [2021-07-09 17:57:50,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3467 states, 3466 states have (on average 1.9899019042123485) internal successors, (6897), 3466 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:50,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3467 states to 3467 states and 6897 transitions. [2021-07-09 17:57:50,185 INFO L78 Accepts]: Start accepts. Automaton has 3467 states and 6897 transitions. Word has length 41 [2021-07-09 17:57:50,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:50,185 INFO L482 AbstractCegarLoop]: Abstraction has 3467 states and 6897 transitions. [2021-07-09 17:57:50,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:57:50,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3467 states and 6897 transitions. [2021-07-09 17:57:50,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:57:50,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:50,188 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:50,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-07-09 17:57:50,389 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:50,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:50,389 INFO L82 PathProgramCache]: Analyzing trace with hash -981044130, now seen corresponding path program 163 times [2021-07-09 17:57:50,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:50,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261975562] [2021-07-09 17:57:50,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:50,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:50,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261975562] [2021-07-09 17:57:50,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261975562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:50,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675144148] [2021-07-09 17:57:50,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:50,773 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 17:57:50,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:51,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:51,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:51,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:51,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:51,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:51,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:51,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-09 17:57:51,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:51,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:51,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:51,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-09 17:57:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:51,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675144148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:51,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:51,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-09 17:57:51,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726995477] [2021-07-09 17:57:51,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 17:57:51,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:51,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 17:57:51,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:57:51,531 INFO L87 Difference]: Start difference. First operand 3467 states and 6897 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:57:52,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:52,331 INFO L93 Difference]: Finished difference Result 5320 states and 10648 transitions. [2021-07-09 17:57:52,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:57:52,331 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:57:52,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:52,337 INFO L225 Difference]: With dead ends: 5320 [2021-07-09 17:57:52,337 INFO L226 Difference]: Without dead ends: 5289 [2021-07-09 17:57:52,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1099.3ms TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:57:52,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5289 states. [2021-07-09 17:57:52,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5289 to 3506. [2021-07-09 17:57:52,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 1.9905848787446505) internal successors, (6977), 3505 states have internal predecessors, (6977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:52,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 6977 transitions. [2021-07-09 17:57:52,372 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 6977 transitions. Word has length 41 [2021-07-09 17:57:52,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:52,372 INFO L482 AbstractCegarLoop]: Abstraction has 3506 states and 6977 transitions. [2021-07-09 17:57:52,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:57:52,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 6977 transitions. [2021-07-09 17:57:52,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:57:52,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:52,376 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:52,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:52,577 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:52,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:52,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1879697322, now seen corresponding path program 164 times [2021-07-09 17:57:52,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:52,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482000100] [2021-07-09 17:57:52,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:52,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:52,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482000100] [2021-07-09 17:57:52,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482000100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:52,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497082382] [2021-07-09 17:57:52,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:57:52,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:52,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:52,957 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 17:57:52,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:53,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:53,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:53,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:53,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:53,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:53,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:53,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-09 17:57:53,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:53,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:53,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:53,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-09 17:57:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:53,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497082382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:53,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:53,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-07-09 17:57:53,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299953186] [2021-07-09 17:57:53,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 17:57:53,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:53,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 17:57:53,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:57:53,665 INFO L87 Difference]: Start difference. First operand 3506 states and 6977 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) 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) [2021-07-09 17:57:54,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:54,453 INFO L93 Difference]: Finished difference Result 6035 states and 12259 transitions. [2021-07-09 17:57:54,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:57:54,454 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) 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) Word has length 41 [2021-07-09 17:57:54,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:54,460 INFO L225 Difference]: With dead ends: 6035 [2021-07-09 17:57:54,460 INFO L226 Difference]: Without dead ends: 5929 [2021-07-09 17:57:54,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1058.6ms TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:57:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5929 states. [2021-07-09 17:57:54,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5929 to 3122. [2021-07-09 17:57:54,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3122 states, 3121 states have (on average 1.993912207625761) internal successors, (6223), 3121 states have internal predecessors, (6223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:54,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3122 states to 3122 states and 6223 transitions. [2021-07-09 17:57:54,497 INFO L78 Accepts]: Start accepts. Automaton has 3122 states and 6223 transitions. Word has length 41 [2021-07-09 17:57:54,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:54,497 INFO L482 AbstractCegarLoop]: Abstraction has 3122 states and 6223 transitions. [2021-07-09 17:57:54,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) 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) [2021-07-09 17:57:54,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3122 states and 6223 transitions. [2021-07-09 17:57:54,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:57:54,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:54,500 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:54,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-07-09 17:57:54,700 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:54,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:54,701 INFO L82 PathProgramCache]: Analyzing trace with hash 207038686, now seen corresponding path program 165 times [2021-07-09 17:57:54,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:54,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087667882] [2021-07-09 17:57:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:55,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:55,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087667882] [2021-07-09 17:57:55,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087667882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:55,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980334821] [2021-07-09 17:57:55,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:55,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:57:55,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:55,075 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 17:57:55,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:55,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:55,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:55,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:55,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:55,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:55,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:55,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-09 17:57:55,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:55,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:55,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:55,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-09 17:57:55,850 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:55,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980334821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:55,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:55,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-09 17:57:55,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311320242] [2021-07-09 17:57:55,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 17:57:55,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:55,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 17:57:55,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:57:55,851 INFO L87 Difference]: Start difference. First operand 3122 states and 6223 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:57:56,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:56,510 INFO L93 Difference]: Finished difference Result 5436 states and 11008 transitions. [2021-07-09 17:57:56,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:57:56,510 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:57:56,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:56,516 INFO L225 Difference]: With dead ends: 5436 [2021-07-09 17:57:56,516 INFO L226 Difference]: Without dead ends: 5333 [2021-07-09 17:57:56,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1148.0ms TimeCoverageRelationStatistics Valid=184, Invalid=1978, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:57:56,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5333 states. [2021-07-09 17:57:56,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5333 to 2879. [2021-07-09 17:57:56,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.0027797081306464) internal successors, (5764), 2878 states have internal predecessors, (5764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:56,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 5764 transitions. [2021-07-09 17:57:56,548 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 5764 transitions. Word has length 41 [2021-07-09 17:57:56,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:56,548 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 5764 transitions. [2021-07-09 17:57:56,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:57:56,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 5764 transitions. [2021-07-09 17:57:56,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:57:56,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:56,550 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:56,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:56,751 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:56,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:56,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1349568106, now seen corresponding path program 166 times [2021-07-09 17:57:56,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:56,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247251495] [2021-07-09 17:57:56,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:57,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:57,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247251495] [2021-07-09 17:57:57,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247251495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:57,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688270746] [2021-07-09 17:57:57,091 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 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 [2021-07-09 17:57:57,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:57:57,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:57,118 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 17:57:57,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:57,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:57,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:57,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:57,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:57,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:57,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:57,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-09 17:57:57,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:57,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:57,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:57,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-09 17:57:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:57,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688270746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:57,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:57,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-09 17:57:57,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866007520] [2021-07-09 17:57:57,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 17:57:57,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:57,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 17:57:57,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1209, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:57:57,881 INFO L87 Difference]: Start difference. First operand 2879 states and 5764 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:57:58,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:58,758 INFO L93 Difference]: Finished difference Result 4690 states and 9451 transitions. [2021-07-09 17:57:58,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:57:58,758 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:57:58,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:58,764 INFO L225 Difference]: With dead ends: 4690 [2021-07-09 17:57:58,764 INFO L226 Difference]: Without dead ends: 4661 [2021-07-09 17:57:58,764 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1144.3ms TimeCoverageRelationStatistics Valid=188, Invalid=1974, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:57:58,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2021-07-09 17:57:58,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 2879. [2021-07-09 17:57:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.0027797081306464) internal successors, (5764), 2878 states have internal predecessors, (5764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 5764 transitions. [2021-07-09 17:57:58,794 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 5764 transitions. Word has length 41 [2021-07-09 17:57:58,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:58,794 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 5764 transitions. [2021-07-09 17:57:58,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:57:58,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 5764 transitions. [2021-07-09 17:57:58,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:57:58,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:58,796 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:58,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-07-09 17:57:58,997 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:58,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:58,997 INFO L82 PathProgramCache]: Analyzing trace with hash 301499944, now seen corresponding path program 167 times [2021-07-09 17:57:58,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:58,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391321268] [2021-07-09 17:57:58,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:59,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:59,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391321268] [2021-07-09 17:57:59,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391321268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:59,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409700107] [2021-07-09 17:57:59,338 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 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 [2021-07-09 17:57:59,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:57:59,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:59,367 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 17:57:59,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:00,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:00,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:00,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:00,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:00,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:00,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:00,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:00,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 36 [2021-07-09 17:58:00,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:00,163 INFO L628 ElimStorePlain]: treesize reduction 5, result has 82.8 percent of original size [2021-07-09 17:58:00,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:00,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:98, output treesize:9 [2021-07-09 17:58:00,186 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:00,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409700107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:00,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:00,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2021-07-09 17:58:00,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399627455] [2021-07-09 17:58:00,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 17:58:00,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:00,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 17:58:00,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:58:00,187 INFO L87 Difference]: Start difference. First operand 2879 states and 5764 transitions. Second operand has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:01,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:01,271 INFO L93 Difference]: Finished difference Result 5671 states and 11398 transitions. [2021-07-09 17:58:01,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 17:58:01,272 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:58:01,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:01,279 INFO L225 Difference]: With dead ends: 5671 [2021-07-09 17:58:01,279 INFO L226 Difference]: Without dead ends: 5413 [2021-07-09 17:58:01,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1279.0ms TimeCoverageRelationStatistics Valid=210, Invalid=2340, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:58:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-07-09 17:58:01,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 3262. [2021-07-09 17:58:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3262 states, 3261 states have (on average 1.9908003679852806) internal successors, (6492), 3261 states have internal predecessors, (6492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:01,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 6492 transitions. [2021-07-09 17:58:01,323 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 6492 transitions. Word has length 41 [2021-07-09 17:58:01,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:01,323 INFO L482 AbstractCegarLoop]: Abstraction has 3262 states and 6492 transitions. [2021-07-09 17:58:01,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:01,323 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 6492 transitions. [2021-07-09 17:58:01,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:58:01,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:01,326 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:01,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:01,526 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:01,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:01,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1290788428, now seen corresponding path program 168 times [2021-07-09 17:58:01,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:01,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622199067] [2021-07-09 17:58:01,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:01,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:01,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622199067] [2021-07-09 17:58:01,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622199067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:01,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587724187] [2021-07-09 17:58:01,941 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 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 [2021-07-09 17:58:01,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:58:01,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:01,971 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 17:58:01,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:02,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:02,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:02,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:02,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:02,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:02,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:02,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-09 17:58:02,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:02,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:02,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:02,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-09 17:58:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:02,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587724187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:02,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:02,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-09 17:58:02,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857409321] [2021-07-09 17:58:02,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 17:58:02,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:02,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 17:58:02,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:58:02,724 INFO L87 Difference]: Start difference. First operand 3262 states and 6492 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:58:03,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:03,588 INFO L93 Difference]: Finished difference Result 6007 states and 12122 transitions. [2021-07-09 17:58:03,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:58:03,589 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:58:03,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:03,596 INFO L225 Difference]: With dead ends: 6007 [2021-07-09 17:58:03,596 INFO L226 Difference]: Without dead ends: 5784 [2021-07-09 17:58:03,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1205.6ms TimeCoverageRelationStatistics Valid=183, Invalid=1979, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:58:03,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5784 states. [2021-07-09 17:58:03,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5784 to 2866. [2021-07-09 17:58:03,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2865 states have (on average 1.9720767888307156) internal successors, (5650), 2865 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:03,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 5650 transitions. [2021-07-09 17:58:03,631 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 5650 transitions. Word has length 41 [2021-07-09 17:58:03,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:03,631 INFO L482 AbstractCegarLoop]: Abstraction has 2866 states and 5650 transitions. [2021-07-09 17:58:03,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:58:03,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 5650 transitions. [2021-07-09 17:58:03,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:58:03,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:03,633 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:03,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:03,834 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:03,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:03,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1447572076, now seen corresponding path program 169 times [2021-07-09 17:58:03,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:03,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786415137] [2021-07-09 17:58:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:04,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:04,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786415137] [2021-07-09 17:58:04,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786415137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:04,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487555927] [2021-07-09 17:58:04,181 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 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 [2021-07-09 17:58:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:04,221 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 17:58:04,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:04,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:04,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:04,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:04,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:04,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:04,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:04,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-09 17:58:04,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:04,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:04,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:04,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-09 17:58:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:04,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487555927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:04,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:04,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-09 17:58:04,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106930112] [2021-07-09 17:58:04,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 17:58:04,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:04,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 17:58:04,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:58:04,991 INFO L87 Difference]: Start difference. First operand 2866 states and 5650 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:58:05,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:05,845 INFO L93 Difference]: Finished difference Result 4555 states and 9072 transitions. [2021-07-09 17:58:05,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:58:05,845 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:58:05,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:05,851 INFO L225 Difference]: With dead ends: 4555 [2021-07-09 17:58:05,851 INFO L226 Difference]: Without dead ends: 4532 [2021-07-09 17:58:05,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1121.5ms TimeCoverageRelationStatistics Valid=175, Invalid=1805, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:58:05,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4532 states. [2021-07-09 17:58:05,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4532 to 2872. [2021-07-09 17:58:05,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 1.9721351445489377) internal successors, (5662), 2871 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 5662 transitions. [2021-07-09 17:58:05,889 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 5662 transitions. Word has length 41 [2021-07-09 17:58:05,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:05,889 INFO L482 AbstractCegarLoop]: Abstraction has 2872 states and 5662 transitions. [2021-07-09 17:58:05,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:58:05,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 5662 transitions. [2021-07-09 17:58:05,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:58:05,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:05,891 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:06,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:06,092 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:06,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:06,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1998697194, now seen corresponding path program 170 times [2021-07-09 17:58:06,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:06,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738308385] [2021-07-09 17:58:06,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:06,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:06,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738308385] [2021-07-09 17:58:06,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738308385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:06,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6721472] [2021-07-09 17:58:06,437 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 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 [2021-07-09 17:58:06,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:58:06,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:06,464 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 17:58:06,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:07,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:07,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:07,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:07,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:07,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:07,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:07,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-09 17:58:07,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:07,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:07,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:07,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-09 17:58:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:07,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6721472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:07,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:07,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-09 17:58:07,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032246444] [2021-07-09 17:58:07,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 17:58:07,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:07,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 17:58:07,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:58:07,228 INFO L87 Difference]: Start difference. First operand 2872 states and 5662 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:58:07,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:07,985 INFO L93 Difference]: Finished difference Result 4567 states and 9099 transitions. [2021-07-09 17:58:07,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:58:07,985 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:58:07,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:07,990 INFO L225 Difference]: With dead ends: 4567 [2021-07-09 17:58:07,991 INFO L226 Difference]: Without dead ends: 4543 [2021-07-09 17:58:07,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1105.1ms TimeCoverageRelationStatistics Valid=175, Invalid=1805, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:58:07,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2021-07-09 17:58:08,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 2872. [2021-07-09 17:58:08,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 1.9721351445489377) internal successors, (5662), 2871 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:08,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 5662 transitions. [2021-07-09 17:58:08,019 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 5662 transitions. Word has length 41 [2021-07-09 17:58:08,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:08,019 INFO L482 AbstractCegarLoop]: Abstraction has 2872 states and 5662 transitions. [2021-07-09 17:58:08,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2021-07-09 17:58:08,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 5662 transitions. [2021-07-09 17:58:08,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:58:08,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:08,022 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:08,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:08,223 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:08,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:08,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1053452280, now seen corresponding path program 171 times [2021-07-09 17:58:08,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:08,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610379368] [2021-07-09 17:58:08,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 75 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:58:08,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:08,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610379368] [2021-07-09 17:58:08,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610379368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:08,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888845805] [2021-07-09 17:58:08,537 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 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 [2021-07-09 17:58:08,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:58:08,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:08,565 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 60 conjunts are in the unsatisfiable core [2021-07-09 17:58:08,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:50,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:50,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:50,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:50,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:50,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:50,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:50,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 44 [2021-07-09 17:58:50,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:50,514 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-09 17:58:50,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:50,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:12 [2021-07-09 17:58:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:50,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888845805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:50,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:50,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 34 [2021-07-09 17:58:50,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626681559] [2021-07-09 17:58:50,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 17:58:50,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:50,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 17:58:50,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1078, Unknown=14, NotChecked=0, Total=1190 [2021-07-09 17:58:50,525 INFO L87 Difference]: Start difference. First operand 2872 states and 5662 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:35,838 WARN L227 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2021-07-09 18:00:35,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:00:36,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:36,040 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:847) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:761) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:474) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:367) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:293) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:238) ... 48 more [2021-07-09 18:00:36,044 INFO L168 Benchmark]: Toolchain (without parser) took 411471.59 ms. Allocated memory was 181.4 MB in the beginning and 660.6 MB in the end (delta: 479.2 MB). Free memory was 160.8 MB in the beginning and 575.4 MB in the end (delta: -414.6 MB). Peak memory consumption was 65.7 MB. Max. memory is 8.0 GB. [2021-07-09 18:00:36,044 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 181.4 MB. Free memory is still 161.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:00:36,044 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.96 ms. Allocated memory is still 181.4 MB. Free memory was 160.7 MB in the beginning and 159.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:00:36,044 INFO L168 Benchmark]: Boogie Preprocessor took 15.59 ms. Allocated memory is still 181.4 MB. Free memory was 159.3 MB in the beginning and 158.4 MB in the end (delta: 939.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:00:36,044 INFO L168 Benchmark]: RCFGBuilder took 205.09 ms. Allocated memory is still 181.4 MB. Free memory was 158.3 MB in the beginning and 146.1 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-09 18:00:36,044 INFO L168 Benchmark]: TraceAbstraction took 411224.29 ms. Allocated memory was 181.4 MB in the beginning and 660.6 MB in the end (delta: 479.2 MB). Free memory was 145.6 MB in the beginning and 575.4 MB in the end (delta: -429.8 MB). Peak memory consumption was 51.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:00:36,044 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 181.4 MB. Free memory is still 161.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.96 ms. Allocated memory is still 181.4 MB. Free memory was 160.7 MB in the beginning and 159.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.59 ms. Allocated memory is still 181.4 MB. Free memory was 159.3 MB in the beginning and 158.4 MB in the end (delta: 939.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 205.09 ms. Allocated memory is still 181.4 MB. Free memory was 158.3 MB in the beginning and 146.1 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 411224.29 ms. Allocated memory was 181.4 MB in the beginning and 660.6 MB in the end (delta: 479.2 MB). Free memory was 145.6 MB in the beginning and 575.4 MB in the end (delta: -429.8 MB). Peak memory consumption was 51.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...